From 07903ada96139ced48f2f893fe57a26a8fbc6043 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 26 May 2017 12:03:10 +0300 Subject: mmtimer: Remove the SGI SN2 mmtimer driver This driver supports direct system clock access on the ancient SGI SN2 IA64 systems, and implement the only non-builtin k_clock instance. Remove it as any remaining IA64 altix user will be running just as old distros anyway. Dimitri Sivanich stated: "Since this is SN2 specific, this can be removed." Note that this does not affect the never uv_mmtimer driver for x86-based Altix systems. [ tglx: Added comment to CLOCK_SGI_CYCLE ] Signed-off-by: Christoph Hellwig Signed-off-by: Thomas Gleixner Cc: Mike Travis Cc: Dimitri Sivanich Link: http://lkml.kernel.org/r/20170526090311.3377-2-hch@lst.de --- drivers/char/Kconfig | 9 - drivers/char/Makefile | 1 - drivers/char/mmtimer.c | 858 ---------------------------------------------- include/uapi/linux/time.h | 6 +- 4 files changed, 5 insertions(+), 869 deletions(-) delete mode 100644 drivers/char/mmtimer.c diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index 31adbebf812e..2af70014ee5a 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -539,15 +539,6 @@ config HANGCHECK_TIMER out to lunch past a certain margin. It can reboot the system or merely print a warning. -config MMTIMER - tristate "MMTIMER Memory mapped RTC for SGI Altix" - depends on IA64_GENERIC || IA64_SGI_SN2 - depends on POSIX_TIMERS - default y - help - The mmtimer device allows direct userspace access to the - Altix system timer. - config UV_MMTIMER tristate "UV_MMTIMER Memory mapped RTC for SGI UV" depends on X86_UV diff --git a/drivers/char/Makefile b/drivers/char/Makefile index 6e6c244a66a0..53e33720818c 100644 --- a/drivers/char/Makefile +++ b/drivers/char/Makefile @@ -10,7 +10,6 @@ obj-$(CONFIG_VIRTIO_CONSOLE) += virtio_console.o obj-$(CONFIG_RAW_DRIVER) += raw.o obj-$(CONFIG_SGI_SNSC) += snsc.o snsc_event.o obj-$(CONFIG_MSPEC) += mspec.o -obj-$(CONFIG_MMTIMER) += mmtimer.o obj-$(CONFIG_UV_MMTIMER) += uv_mmtimer.o obj-$(CONFIG_IBM_BSR) += bsr.o obj-$(CONFIG_SGI_MBCS) += mbcs.o diff --git a/drivers/char/mmtimer.c b/drivers/char/mmtimer.c deleted file mode 100644 index 0e7fcb04f01e..000000000000 --- a/drivers/char/mmtimer.c +++ /dev/null @@ -1,858 +0,0 @@ -/* - * Timer device implementation for SGI SN platforms. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (c) 2001-2006 Silicon Graphics, Inc. All rights reserved. - * - * This driver exports an API that should be supportable by any HPET or IA-PC - * multimedia timer. The code below is currently specific to the SGI Altix - * SHub RTC, however. - * - * 11/01/01 - jbarnes - initial revision - * 9/10/04 - Christoph Lameter - remove interrupt support for kernel inclusion - * 10/1/04 - Christoph Lameter - provide posix clock CLOCK_SGI_CYCLE - * 10/13/04 - Christoph Lameter, Dimitri Sivanich - provide timer interrupt - * support via the posix timer interface - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include - -MODULE_AUTHOR("Jesse Barnes "); -MODULE_DESCRIPTION("SGI Altix RTC Timer"); -MODULE_LICENSE("GPL"); - -/* name of the device, usually in /dev */ -#define MMTIMER_NAME "mmtimer" -#define MMTIMER_DESC "SGI Altix RTC Timer" -#define MMTIMER_VERSION "2.1" - -#define RTC_BITS 55 /* 55 bits for this implementation */ - -static struct k_clock sgi_clock; - -extern unsigned long sn_rtc_cycles_per_second; - -#define RTC_COUNTER_ADDR ((long *)LOCAL_MMR_ADDR(SH_RTC)) - -#define rtc_time() (*RTC_COUNTER_ADDR) - -static DEFINE_MUTEX(mmtimer_mutex); -static long mmtimer_ioctl(struct file *file, unsigned int cmd, - unsigned long arg); -static int mmtimer_mmap(struct file *file, struct vm_area_struct *vma); - -/* - * Period in femtoseconds (10^-15 s) - */ -static unsigned long mmtimer_femtoperiod = 0; - -static const struct file_operations mmtimer_fops = { - .owner = THIS_MODULE, - .mmap = mmtimer_mmap, - .unlocked_ioctl = mmtimer_ioctl, - .llseek = noop_llseek, -}; - -/* - * We only have comparison registers RTC1-4 currently available per - * node. RTC0 is used by SAL. - */ -/* Check for an RTC interrupt pending */ -static int mmtimer_int_pending(int comparator) -{ - if (HUB_L((unsigned long *)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED)) & - SH_EVENT_OCCURRED_RTC1_INT_MASK << comparator) - return 1; - else - return 0; -} - -/* Clear the RTC interrupt pending bit */ -static void mmtimer_clr_int_pending(int comparator) -{ - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED_ALIAS), - SH_EVENT_OCCURRED_RTC1_INT_MASK << comparator); -} - -/* Setup timer on comparator RTC1 */ -static void mmtimer_setup_int_0(int cpu, u64 expires) -{ - u64 val; - - /* Disable interrupt */ - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC1_INT_ENABLE), 0UL); - - /* Initialize comparator value */ - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_INT_CMPB), -1L); - - /* Clear pending bit */ - mmtimer_clr_int_pending(0); - - val = ((u64)SGI_MMTIMER_VECTOR << SH_RTC1_INT_CONFIG_IDX_SHFT) | - ((u64)cpu_physical_id(cpu) << - SH_RTC1_INT_CONFIG_PID_SHFT); - - /* Set configuration */ - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC1_INT_CONFIG), val); - - /* Enable RTC interrupts */ - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC1_INT_ENABLE), 1UL); - - /* Initialize comparator value */ - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_INT_CMPB), expires); - - -} - -/* Setup timer on comparator RTC2 */ -static void mmtimer_setup_int_1(int cpu, u64 expires) -{ - u64 val; - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC2_INT_ENABLE), 0UL); - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_INT_CMPC), -1L); - - mmtimer_clr_int_pending(1); - - val = ((u64)SGI_MMTIMER_VECTOR << SH_RTC2_INT_CONFIG_IDX_SHFT) | - ((u64)cpu_physical_id(cpu) << - SH_RTC2_INT_CONFIG_PID_SHFT); - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC2_INT_CONFIG), val); - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC2_INT_ENABLE), 1UL); - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_INT_CMPC), expires); -} - -/* Setup timer on comparator RTC3 */ -static void mmtimer_setup_int_2(int cpu, u64 expires) -{ - u64 val; - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC3_INT_ENABLE), 0UL); - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_INT_CMPD), -1L); - - mmtimer_clr_int_pending(2); - - val = ((u64)SGI_MMTIMER_VECTOR << SH_RTC3_INT_CONFIG_IDX_SHFT) | - ((u64)cpu_physical_id(cpu) << - SH_RTC3_INT_CONFIG_PID_SHFT); - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC3_INT_CONFIG), val); - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC3_INT_ENABLE), 1UL); - - HUB_S((u64 *)LOCAL_MMR_ADDR(SH_INT_CMPD), expires); -} - -/* - * This function must be called with interrupts disabled and preemption off - * in order to insure that the setup succeeds in a deterministic time frame. - * It will check if the interrupt setup succeeded. - */ -static int mmtimer_setup(int cpu, int comparator, unsigned long expires, - u64 *set_completion_time) -{ - switch (comparator) { - case 0: - mmtimer_setup_int_0(cpu, expires); - break; - case 1: - mmtimer_setup_int_1(cpu, expires); - break; - case 2: - mmtimer_setup_int_2(cpu, expires); - break; - } - /* We might've missed our expiration time */ - *set_completion_time = rtc_time(); - if (*set_completion_time <= expires) - return 1; - - /* - * If an interrupt is already pending then its okay - * if not then we failed - */ - return mmtimer_int_pending(comparator); -} - -static int mmtimer_disable_int(long nasid, int comparator) -{ - switch (comparator) { - case 0: - nasid == -1 ? HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC1_INT_ENABLE), - 0UL) : REMOTE_HUB_S(nasid, SH_RTC1_INT_ENABLE, 0UL); - break; - case 1: - nasid == -1 ? HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC2_INT_ENABLE), - 0UL) : REMOTE_HUB_S(nasid, SH_RTC2_INT_ENABLE, 0UL); - break; - case 2: - nasid == -1 ? HUB_S((u64 *)LOCAL_MMR_ADDR(SH_RTC3_INT_ENABLE), - 0UL) : REMOTE_HUB_S(nasid, SH_RTC3_INT_ENABLE, 0UL); - break; - default: - return -EFAULT; - } - return 0; -} - -#define COMPARATOR 1 /* The comparator to use */ - -#define TIMER_OFF 0xbadcabLL /* Timer is not setup */ -#define TIMER_SET 0 /* Comparator is set for this timer */ - -#define MMTIMER_INTERVAL_RETRY_INCREMENT_DEFAULT 40 - -/* There is one of these for each timer */ -struct mmtimer { - struct rb_node list; - struct k_itimer *timer; - int cpu; -}; - -struct mmtimer_node { - spinlock_t lock ____cacheline_aligned; - struct rb_root timer_head; - struct rb_node *next; - struct tasklet_struct tasklet; -}; -static struct mmtimer_node *timers; - -static unsigned mmtimer_interval_retry_increment = - MMTIMER_INTERVAL_RETRY_INCREMENT_DEFAULT; -module_param(mmtimer_interval_retry_increment, uint, 0644); -MODULE_PARM_DESC(mmtimer_interval_retry_increment, - "RTC ticks to add to expiration on interval retry (default 40)"); - -/* - * Add a new mmtimer struct to the node's mmtimer list. - * This function assumes the struct mmtimer_node is locked. - */ -static void mmtimer_add_list(struct mmtimer *n) -{ - int nodeid = n->timer->it.mmtimer.node; - unsigned long expires = n->timer->it.mmtimer.expires; - struct rb_node **link = &timers[nodeid].timer_head.rb_node; - struct rb_node *parent = NULL; - struct mmtimer *x; - - /* - * Find the right place in the rbtree: - */ - while (*link) { - parent = *link; - x = rb_entry(parent, struct mmtimer, list); - - if (expires < x->timer->it.mmtimer.expires) - link = &(*link)->rb_left; - else - link = &(*link)->rb_right; - } - - /* - * Insert the timer to the rbtree and check whether it - * replaces the first pending timer - */ - rb_link_node(&n->list, parent, link); - rb_insert_color(&n->list, &timers[nodeid].timer_head); - - if (!timers[nodeid].next || expires < rb_entry(timers[nodeid].next, - struct mmtimer, list)->timer->it.mmtimer.expires) - timers[nodeid].next = &n->list; -} - -/* - * Set the comparator for the next timer. - * This function assumes the struct mmtimer_node is locked. - */ -static void mmtimer_set_next_timer(int nodeid) -{ - struct mmtimer_node *n = &timers[nodeid]; - struct mmtimer *x; - struct k_itimer *t; - u64 expires, exp, set_completion_time; - int i; - -restart: - if (n->next == NULL) - return; - - x = rb_entry(n->next, struct mmtimer, list); - t = x->timer; - if (!t->it.mmtimer.incr) { - /* Not an interval timer */ - if (!mmtimer_setup(x->cpu, COMPARATOR, - t->it.mmtimer.expires, - &set_completion_time)) { - /* Late setup, fire now */ - tasklet_schedule(&n->tasklet); - } - return; - } - - /* Interval timer */ - i = 0; - expires = exp = t->it.mmtimer.expires; - while (!mmtimer_setup(x->cpu, COMPARATOR, expires, - &set_completion_time)) { - int to; - - i++; - expires = set_completion_time + - mmtimer_interval_retry_increment + (1 << i); - /* Calculate overruns as we go. */ - to = ((u64)(expires - exp) / t->it.mmtimer.incr); - if (to) { - t->it_overrun += to; - t->it.mmtimer.expires += t->it.mmtimer.incr * to; - exp = t->it.mmtimer.expires; - } - if (i > 20) { - printk(KERN_ALERT "mmtimer: cannot reschedule timer\n"); - t->it.mmtimer.clock = TIMER_OFF; - n->next = rb_next(&x->list); - rb_erase(&x->list, &n->timer_head); - kfree(x); - goto restart; - } - } -} - -/** - * mmtimer_ioctl - ioctl interface for /dev/mmtimer - * @file: file structure for the device - * @cmd: command to execute - * @arg: optional argument to command - * - * Executes the command specified by @cmd. Returns 0 for success, < 0 for - * failure. - * - * Valid commands: - * - * %MMTIMER_GETOFFSET - Should return the offset (relative to the start - * of the page where the registers are mapped) for the counter in question. - * - * %MMTIMER_GETRES - Returns the resolution of the clock in femto (10^-15) - * seconds - * - * %MMTIMER_GETFREQ - Copies the frequency of the clock in Hz to the address - * specified by @arg - * - * %MMTIMER_GETBITS - Returns the number of bits in the clock's counter - * - * %MMTIMER_MMAPAVAIL - Returns 1 if the registers can be mmap'd into userspace - * - * %MMTIMER_GETCOUNTER - Gets the current value in the counter and places it - * in the address specified by @arg. - */ -static long mmtimer_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - int ret = 0; - - mutex_lock(&mmtimer_mutex); - - switch (cmd) { - case MMTIMER_GETOFFSET: /* offset of the counter */ - /* - * SN RTC registers are on their own 64k page - */ - if(PAGE_SIZE <= (1 << 16)) - ret = (((long)RTC_COUNTER_ADDR) & (PAGE_SIZE-1)) / 8; - else - ret = -ENOSYS; - break; - - case MMTIMER_GETRES: /* resolution of the clock in 10^-15 s */ - if(copy_to_user((unsigned long __user *)arg, - &mmtimer_femtoperiod, sizeof(unsigned long))) - ret = -EFAULT; - break; - - case MMTIMER_GETFREQ: /* frequency in Hz */ - if(copy_to_user((unsigned long __user *)arg, - &sn_rtc_cycles_per_second, - sizeof(unsigned long))) - ret = -EFAULT; - break; - - case MMTIMER_GETBITS: /* number of bits in the clock */ - ret = RTC_BITS; - break; - - case MMTIMER_MMAPAVAIL: /* can we mmap the clock into userspace? */ - ret = (PAGE_SIZE <= (1 << 16)) ? 1 : 0; - break; - - case MMTIMER_GETCOUNTER: - if(copy_to_user((unsigned long __user *)arg, - RTC_COUNTER_ADDR, sizeof(unsigned long))) - ret = -EFAULT; - break; - default: - ret = -ENOTTY; - break; - } - mutex_unlock(&mmtimer_mutex); - return ret; -} - -/** - * mmtimer_mmap - maps the clock's registers into userspace - * @file: file structure for the device - * @vma: VMA to map the registers into - * - * Calls remap_pfn_range() to map the clock's registers into - * the calling process' address space. - */ -static int mmtimer_mmap(struct file *file, struct vm_area_struct *vma) -{ - unsigned long mmtimer_addr; - - if (vma->vm_end - vma->vm_start != PAGE_SIZE) - return -EINVAL; - - if (vma->vm_flags & VM_WRITE) - return -EPERM; - - if (PAGE_SIZE > (1 << 16)) - return -ENOSYS; - - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - - mmtimer_addr = __pa(RTC_COUNTER_ADDR); - mmtimer_addr &= ~(PAGE_SIZE - 1); - mmtimer_addr &= 0xfffffffffffffffUL; - - if (remap_pfn_range(vma, vma->vm_start, mmtimer_addr >> PAGE_SHIFT, - PAGE_SIZE, vma->vm_page_prot)) { - printk(KERN_ERR "remap_pfn_range failed in mmtimer.c\n"); - return -EAGAIN; - } - - return 0; -} - -static struct miscdevice mmtimer_miscdev = { - .minor = SGI_MMTIMER, - .name = MMTIMER_NAME, - .fops = &mmtimer_fops -}; - -static struct timespec sgi_clock_offset; -static int sgi_clock_period; - -/* - * Posix Timer Interface - */ - -static struct timespec sgi_clock_offset; -static int sgi_clock_period; - -static int sgi_clock_get(clockid_t clockid, struct timespec64 *tp) -{ - u64 nsec; - - nsec = rtc_time() * sgi_clock_period - + sgi_clock_offset.tv_nsec; - *tp = ns_to_timespec64(nsec); - tp->tv_sec += sgi_clock_offset.tv_sec; - return 0; -}; - -static int sgi_clock_set(const clockid_t clockid, const struct timespec64 *tp) -{ - - u64 nsec; - u32 rem; - - nsec = rtc_time() * sgi_clock_period; - - sgi_clock_offset.tv_sec = tp->tv_sec - div_u64_rem(nsec, NSEC_PER_SEC, &rem); - - if (rem <= tp->tv_nsec) - sgi_clock_offset.tv_nsec = tp->tv_sec - rem; - else { - sgi_clock_offset.tv_nsec = tp->tv_sec + NSEC_PER_SEC - rem; - sgi_clock_offset.tv_sec--; - } - return 0; -} - -/** - * mmtimer_interrupt - timer interrupt handler - * @irq: irq received - * @dev_id: device the irq came from - * - * Called when one of the comarators matches the counter, This - * routine will send signals to processes that have requested - * them. - * - * This interrupt is run in an interrupt context - * by the SHUB. It is therefore safe to locally access SHub - * registers. - */ -static irqreturn_t -mmtimer_interrupt(int irq, void *dev_id) -{ - unsigned long expires = 0; - int result = IRQ_NONE; - unsigned indx = cpu_to_node(smp_processor_id()); - struct mmtimer *base; - - spin_lock(&timers[indx].lock); - base = rb_entry(timers[indx].next, struct mmtimer, list); - if (base == NULL) { - spin_unlock(&timers[indx].lock); - return result; - } - - if (base->cpu == smp_processor_id()) { - if (base->timer) - expires = base->timer->it.mmtimer.expires; - /* expires test won't work with shared irqs */ - if ((mmtimer_int_pending(COMPARATOR) > 0) || - (expires && (expires <= rtc_time()))) { - mmtimer_clr_int_pending(COMPARATOR); - tasklet_schedule(&timers[indx].tasklet); - result = IRQ_HANDLED; - } - } - spin_unlock(&timers[indx].lock); - return result; -} - -static void mmtimer_tasklet(unsigned long data) -{ - int nodeid = data; - struct mmtimer_node *mn = &timers[nodeid]; - struct mmtimer *x; - struct k_itimer *t; - unsigned long flags; - - /* Send signal and deal with periodic signals */ - spin_lock_irqsave(&mn->lock, flags); - if (!mn->next) - goto out; - - x = rb_entry(mn->next, struct mmtimer, list); - t = x->timer; - - if (t->it.mmtimer.clock == TIMER_OFF) - goto out; - - t->it_overrun = 0; - - mn->next = rb_next(&x->list); - rb_erase(&x->list, &mn->timer_head); - - if (posix_timer_event(t, 0) != 0) - t->it_overrun++; - - if(t->it.mmtimer.incr) { - t->it.mmtimer.expires += t->it.mmtimer.incr; - mmtimer_add_list(x); - } else { - /* Ensure we don't false trigger in mmtimer_interrupt */ - t->it.mmtimer.clock = TIMER_OFF; - t->it.mmtimer.expires = 0; - kfree(x); - } - /* Set comparator for next timer, if there is one */ - mmtimer_set_next_timer(nodeid); - - t->it_overrun_last = t->it_overrun; -out: - spin_unlock_irqrestore(&mn->lock, flags); -} - -static int sgi_timer_create(struct k_itimer *timer) -{ - /* Insure that a newly created timer is off */ - timer->it.mmtimer.clock = TIMER_OFF; - return 0; -} - -/* This does not really delete a timer. It just insures - * that the timer is not active - * - * Assumption: it_lock is already held with irq's disabled - */ -static int sgi_timer_del(struct k_itimer *timr) -{ - cnodeid_t nodeid = timr->it.mmtimer.node; - unsigned long irqflags; - - spin_lock_irqsave(&timers[nodeid].lock, irqflags); - if (timr->it.mmtimer.clock != TIMER_OFF) { - unsigned long expires = timr->it.mmtimer.expires; - struct rb_node *n = timers[nodeid].timer_head.rb_node; - struct mmtimer *uninitialized_var(t); - int r = 0; - - timr->it.mmtimer.clock = TIMER_OFF; - timr->it.mmtimer.expires = 0; - - while (n) { - t = rb_entry(n, struct mmtimer, list); - if (t->timer == timr) - break; - - if (expires < t->timer->it.mmtimer.expires) - n = n->rb_left; - else - n = n->rb_right; - } - - if (!n) { - spin_unlock_irqrestore(&timers[nodeid].lock, irqflags); - return 0; - } - - if (timers[nodeid].next == n) { - timers[nodeid].next = rb_next(n); - r = 1; - } - - rb_erase(n, &timers[nodeid].timer_head); - kfree(t); - - if (r) { - mmtimer_disable_int(cnodeid_to_nasid(nodeid), - COMPARATOR); - mmtimer_set_next_timer(nodeid); - } - } - spin_unlock_irqrestore(&timers[nodeid].lock, irqflags); - return 0; -} - -/* Assumption: it_lock is already held with irq's disabled */ -static void sgi_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) -{ - - if (timr->it.mmtimer.clock == TIMER_OFF) { - cur_setting->it_interval.tv_nsec = 0; - cur_setting->it_interval.tv_sec = 0; - cur_setting->it_value.tv_nsec = 0; - cur_setting->it_value.tv_sec =0; - return; - } - - cur_setting->it_interval = ns_to_timespec64(timr->it.mmtimer.incr * sgi_clock_period); - cur_setting->it_value = ns_to_timespec64((timr->it.mmtimer.expires - rtc_time()) * sgi_clock_period); -} - - -static int sgi_timer_set(struct k_itimer *timr, int flags, - struct itimerspec64 *new_setting, - struct itimerspec64 *old_setting) -{ - unsigned long when, period, irqflags; - int err = 0; - cnodeid_t nodeid; - struct mmtimer *base; - struct rb_node *n; - - if (old_setting) - sgi_timer_get(timr, old_setting); - - sgi_timer_del(timr); - when = timespec64_to_ns(&new_setting->it_value); - period = timespec64_to_ns(&new_setting->it_interval); - - if (when == 0) - /* Clear timer */ - return 0; - - base = kmalloc(sizeof(struct mmtimer), GFP_KERNEL); - if (base == NULL) - return -ENOMEM; - - if (flags & TIMER_ABSTIME) { - struct timespec64 n; - unsigned long now; - - getnstimeofday64(&n); - now = timespec64_to_ns(&n); - if (when > now) - when -= now; - else - /* Fire the timer immediately */ - when = 0; - } - - /* - * Convert to sgi clock period. Need to keep rtc_time() as near as possible - * to getnstimeofday() in order to be as faithful as possible to the time - * specified. - */ - when = (when + sgi_clock_period - 1) / sgi_clock_period + rtc_time(); - period = (period + sgi_clock_period - 1) / sgi_clock_period; - - /* - * We are allocating a local SHub comparator. If we would be moved to another - * cpu then another SHub may be local to us. Prohibit that by switching off - * preemption. - */ - preempt_disable(); - - nodeid = cpu_to_node(smp_processor_id()); - - /* Lock the node timer structure */ - spin_lock_irqsave(&timers[nodeid].lock, irqflags); - - base->timer = timr; - base->cpu = smp_processor_id(); - - timr->it.mmtimer.clock = TIMER_SET; - timr->it.mmtimer.node = nodeid; - timr->it.mmtimer.incr = period; - timr->it.mmtimer.expires = when; - - n = timers[nodeid].next; - - /* Add the new struct mmtimer to node's timer list */ - mmtimer_add_list(base); - - if (timers[nodeid].next == n) { - /* No need to reprogram comparator for now */ - spin_unlock_irqrestore(&timers[nodeid].lock, irqflags); - preempt_enable(); - return err; - } - - /* We need to reprogram the comparator */ - if (n) - mmtimer_disable_int(cnodeid_to_nasid(nodeid), COMPARATOR); - - mmtimer_set_next_timer(nodeid); - - /* Unlock the node timer structure */ - spin_unlock_irqrestore(&timers[nodeid].lock, irqflags); - - preempt_enable(); - - return err; -} - -static int sgi_clock_getres(const clockid_t which_clock, struct timespec64 *tp) -{ - tp->tv_sec = 0; - tp->tv_nsec = sgi_clock_period; - return 0; -} - -static struct k_clock sgi_clock = { - .clock_set = sgi_clock_set, - .clock_get = sgi_clock_get, - .clock_getres = sgi_clock_getres, - .timer_create = sgi_timer_create, - .timer_set = sgi_timer_set, - .timer_del = sgi_timer_del, - .timer_get = sgi_timer_get -}; - -/** - * mmtimer_init - device initialization routine - * - * Does initial setup for the mmtimer device. - */ -static int __init mmtimer_init(void) -{ - cnodeid_t node, maxn = -1; - - if (!ia64_platform_is("sn2")) - return 0; - - /* - * Sanity check the cycles/sec variable - */ - if (sn_rtc_cycles_per_second < 100000) { - printk(KERN_ERR "%s: unable to determine clock frequency\n", - MMTIMER_NAME); - goto out1; - } - - mmtimer_femtoperiod = ((unsigned long)1E15 + sn_rtc_cycles_per_second / - 2) / sn_rtc_cycles_per_second; - - if (request_irq(SGI_MMTIMER_VECTOR, mmtimer_interrupt, IRQF_PERCPU, MMTIMER_NAME, NULL)) { - printk(KERN_WARNING "%s: unable to allocate interrupt.", - MMTIMER_NAME); - goto out1; - } - - if (misc_register(&mmtimer_miscdev)) { - printk(KERN_ERR "%s: failed to register device\n", - MMTIMER_NAME); - goto out2; - } - - /* Get max numbered node, calculate slots needed */ - for_each_online_node(node) { - maxn = node; - } - maxn++; - - /* Allocate list of node ptrs to mmtimer_t's */ - timers = kzalloc(sizeof(struct mmtimer_node)*maxn, GFP_KERNEL); - if (!timers) { - printk(KERN_ERR "%s: failed to allocate memory for device\n", - MMTIMER_NAME); - goto out3; - } - - /* Initialize struct mmtimer's for each online node */ - for_each_online_node(node) { - spin_lock_init(&timers[node].lock); - tasklet_init(&timers[node].tasklet, mmtimer_tasklet, - (unsigned long) node); - } - - sgi_clock_period = NSEC_PER_SEC / sn_rtc_cycles_per_second; - posix_timers_register_clock(CLOCK_SGI_CYCLE, &sgi_clock); - - printk(KERN_INFO "%s: v%s, %ld MHz\n", MMTIMER_DESC, MMTIMER_VERSION, - sn_rtc_cycles_per_second/(unsigned long)1E6); - - return 0; - -out3: - misc_deregister(&mmtimer_miscdev); -out2: - free_irq(SGI_MMTIMER_VECTOR, NULL); -out1: - return -1; -} - -module_init(mmtimer_init); diff --git a/include/uapi/linux/time.h b/include/uapi/linux/time.h index e75e1b6ff27f..09299fcb842a 100644 --- a/include/uapi/linux/time.h +++ b/include/uapi/linux/time.h @@ -54,7 +54,11 @@ struct itimerval { #define CLOCK_BOOTTIME 7 #define CLOCK_REALTIME_ALARM 8 #define CLOCK_BOOTTIME_ALARM 9 -#define CLOCK_SGI_CYCLE 10 /* Hardware specific */ +/* + * The driver implementing this got removed. The clock ID is kept as a + * place holder. Do not reuse! + */ +#define CLOCK_SGI_CYCLE 10 #define CLOCK_TAI 11 #define MAX_CLOCKS 16 -- cgit v1.2.3-58-ga151 From d3ba5a9a345b1243276f8a982e1bce557c2504fd Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 26 May 2017 12:03:11 +0300 Subject: posix-timers: Make posix_clocks immutable There are no more modular users providing a posix clock. The register function is now pointless so the posix clock array can be initialized statically at compile time and the array including the various k_clock structs can be marked 'const'. Inspired by changes in the Grsecurity patch set, but done proper. [ tglx: Massaged changelog and fixed the POSIX_TIMER=n case ] Signed-off-by: Christoph Hellwig Signed-off-by: Thomas Gleixner Cc: Mike Travis Cc: Dimitri Sivanich Link: http://lkml.kernel.org/r/20170526090311.3377-3-hch@lst.de --- include/linux/posix-timers.h | 9 +- kernel/time/alarmtimer.c | 89 ++++++++++--------- kernel/time/posix-clock.c | 2 +- kernel/time/posix-cpu-timers.c | 34 +++----- kernel/time/posix-timers.c | 191 +++++++++++++++++++---------------------- 5 files changed, 151 insertions(+), 174 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 8c1e43ab14a9..b313ef2e7385 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -105,10 +105,11 @@ struct k_clock { struct itimerspec64 *cur_setting); }; -extern struct k_clock clock_posix_cpu; -extern struct k_clock clock_posix_dynamic; - -void posix_timers_register_clock(const clockid_t clock_id, struct k_clock *new_clock); +extern const struct k_clock clock_posix_cpu; +extern const struct k_clock clock_posix_dynamic; +extern const struct k_clock clock_process; +extern const struct k_clock clock_thread; +extern const struct k_clock alarm_clock; /* function to call to trigger timer event */ int posix_timer_event(struct k_itimer *timr, int si_private); diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 5cb5b0008d97..4f4cc3509b30 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -307,38 +307,6 @@ static int alarmtimer_resume(struct device *dev) } #endif -static void alarmtimer_freezerset(ktime_t absexp, enum alarmtimer_type type) -{ - struct alarm_base *base; - unsigned long flags; - ktime_t delta; - - switch(type) { - case ALARM_REALTIME: - base = &alarm_bases[ALARM_REALTIME]; - type = ALARM_REALTIME_FREEZER; - break; - case ALARM_BOOTTIME: - base = &alarm_bases[ALARM_BOOTTIME]; - type = ALARM_BOOTTIME_FREEZER; - break; - default: - WARN_ONCE(1, "Invalid alarm type: %d\n", type); - return; - } - - delta = ktime_sub(absexp, base->gettime()); - - spin_lock_irqsave(&freezer_delta_lock, flags); - if (!freezer_delta || (delta < freezer_delta)) { - freezer_delta = delta; - freezer_expires = absexp; - freezer_alarmtype = type; - } - spin_unlock_irqrestore(&freezer_delta_lock, flags); -} - - /** * alarm_init - Initialize an alarm structure * @alarm: ptr to alarm to be initialized @@ -488,6 +456,38 @@ u64 alarm_forward_now(struct alarm *alarm, ktime_t interval) } EXPORT_SYMBOL_GPL(alarm_forward_now); +#ifdef CONFIG_POSIX_TIMERS + +static void alarmtimer_freezerset(ktime_t absexp, enum alarmtimer_type type) +{ + struct alarm_base *base; + unsigned long flags; + ktime_t delta; + + switch(type) { + case ALARM_REALTIME: + base = &alarm_bases[ALARM_REALTIME]; + type = ALARM_REALTIME_FREEZER; + break; + case ALARM_BOOTTIME: + base = &alarm_bases[ALARM_BOOTTIME]; + type = ALARM_BOOTTIME_FREEZER; + break; + default: + WARN_ONCE(1, "Invalid alarm type: %d\n", type); + return; + } + + delta = ktime_sub(absexp, base->gettime()); + + spin_lock_irqsave(&freezer_delta_lock, flags); + if (!freezer_delta || (delta < freezer_delta)) { + freezer_delta = delta; + freezer_expires = absexp; + freezer_alarmtype = type; + } + spin_unlock_irqrestore(&freezer_delta_lock, flags); +} /** * clock2alarm - helper that converts from clockid to alarmtypes @@ -846,6 +846,17 @@ out: return ret; } +const struct k_clock alarm_clock = { + .clock_getres = alarm_clock_getres, + .clock_get = alarm_clock_get, + .timer_create = alarm_timer_create, + .timer_set = alarm_timer_set, + .timer_del = alarm_timer_del, + .timer_get = alarm_timer_get, + .nsleep = alarm_timer_nsleep, +}; +#endif /* CONFIG_POSIX_TIMERS */ + /* Suspend hook structures */ static const struct dev_pm_ops alarmtimer_pm_ops = { @@ -871,23 +882,9 @@ static int __init alarmtimer_init(void) struct platform_device *pdev; int error = 0; int i; - struct k_clock alarm_clock = { - .clock_getres = alarm_clock_getres, - .clock_get = alarm_clock_get, - .timer_create = alarm_timer_create, - .timer_set = alarm_timer_set, - .timer_del = alarm_timer_del, - .timer_get = alarm_timer_get, - .nsleep = alarm_timer_nsleep, - }; alarmtimer_rtc_timer_init(); - if (IS_ENABLED(CONFIG_POSIX_TIMERS)) { - posix_timers_register_clock(CLOCK_REALTIME_ALARM, &alarm_clock); - posix_timers_register_clock(CLOCK_BOOTTIME_ALARM, &alarm_clock); - } - /* Initialize alarm bases */ alarm_bases[ALARM_REALTIME].base_clockid = CLOCK_REALTIME; alarm_bases[ALARM_REALTIME].gettime = &ktime_get_real; diff --git a/kernel/time/posix-clock.c b/kernel/time/posix-clock.c index 31d588d37a17..7e453005e078 100644 --- a/kernel/time/posix-clock.c +++ b/kernel/time/posix-clock.c @@ -434,7 +434,7 @@ static int pc_timer_settime(struct k_itimer *kit, int flags, return err; } -struct k_clock clock_posix_dynamic = { +const struct k_clock clock_posix_dynamic = { .clock_getres = pc_clock_getres, .clock_set = pc_clock_settime, .clock_get = pc_clock_gettime, diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 1370f067fb51..1a522b39f19d 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1413,7 +1413,7 @@ static int thread_cpu_timer_create(struct k_itimer *timer) return posix_cpu_timer_create(timer); } -struct k_clock clock_posix_cpu = { +const struct k_clock clock_posix_cpu = { .clock_getres = posix_cpu_clock_getres, .clock_set = posix_cpu_clock_set, .clock_get = posix_cpu_clock_get, @@ -1425,24 +1425,16 @@ struct k_clock clock_posix_cpu = { .timer_get = posix_cpu_timer_get, }; -static __init int init_posix_cpu_timers(void) -{ - struct k_clock process = { - .clock_getres = process_cpu_clock_getres, - .clock_get = process_cpu_clock_get, - .timer_create = process_cpu_timer_create, - .nsleep = process_cpu_nsleep, - .nsleep_restart = process_cpu_nsleep_restart, - }; - struct k_clock thread = { - .clock_getres = thread_cpu_clock_getres, - .clock_get = thread_cpu_clock_get, - .timer_create = thread_cpu_timer_create, - }; - - posix_timers_register_clock(CLOCK_PROCESS_CPUTIME_ID, &process); - posix_timers_register_clock(CLOCK_THREAD_CPUTIME_ID, &thread); +const struct k_clock clock_process = { + .clock_getres = process_cpu_clock_getres, + .clock_get = process_cpu_clock_get, + .timer_create = process_cpu_timer_create, + .nsleep = process_cpu_nsleep, + .nsleep_restart = process_cpu_nsleep_restart, +}; - return 0; -} -__initcall(init_posix_cpu_timers); +const struct k_clock clock_thread = { + .clock_getres = thread_cpu_clock_getres, + .clock_get = thread_cpu_clock_get, + .timer_create = thread_cpu_timer_create, +}; diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 4d7b2ce09c27..0c0cccfa3586 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -125,8 +125,6 @@ static DEFINE_SPINLOCK(hash_lock); * which we beg off on and pass to do_sys_settimeofday(). */ -static struct k_clock posix_clocks[MAX_CLOCKS]; - /* * These ones are defined below. */ @@ -280,74 +278,87 @@ static int posix_get_hrtimer_res(clockid_t which_clock, struct timespec64 *tp) return 0; } + +static const struct k_clock clock_realtime = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_clock_realtime_get, + .clock_set = posix_clock_realtime_set, + .clock_adj = posix_clock_realtime_adj, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, +}; + +static const struct k_clock clock_monotonic = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_ktime_get_ts, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, +}; + +static const struct k_clock clock_monotonic_raw = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_get_monotonic_raw, +}; + +static const struct k_clock clock_realtime_coarse = { + .clock_getres = posix_get_coarse_res, + .clock_get = posix_get_realtime_coarse, +}; + +static const struct k_clock clock_monotonic_coarse = { + .clock_getres = posix_get_coarse_res, + .clock_get = posix_get_monotonic_coarse, +}; + +static const struct k_clock clock_tai = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_get_tai, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, +}; + +static const struct k_clock clock_boottime = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_get_boottime, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, +}; + +static const struct k_clock * const posix_clocks[] = { + [CLOCK_REALTIME] = &clock_realtime, + [CLOCK_MONOTONIC] = &clock_monotonic, + [CLOCK_PROCESS_CPUTIME_ID] = &clock_process, + [CLOCK_THREAD_CPUTIME_ID] = &clock_thread, + [CLOCK_MONOTONIC_RAW] = &clock_monotonic_raw, + [CLOCK_REALTIME_COARSE] = &clock_realtime_coarse, + [CLOCK_MONOTONIC_COARSE] = &clock_monotonic_coarse, + [CLOCK_BOOTTIME] = &clock_boottime, + [CLOCK_REALTIME_ALARM] = &alarm_clock, + [CLOCK_BOOTTIME_ALARM] = &alarm_clock, + [CLOCK_TAI] = &clock_tai, +}; + /* * Initialize everything, well, just everything in Posix clocks/timers ;) */ static __init int init_posix_timers(void) { - struct k_clock clock_realtime = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_clock_realtime_get, - .clock_set = posix_clock_realtime_set, - .clock_adj = posix_clock_realtime_adj, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, - }; - struct k_clock clock_monotonic = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_ktime_get_ts, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, - }; - struct k_clock clock_monotonic_raw = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_get_monotonic_raw, - }; - struct k_clock clock_realtime_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_realtime_coarse, - }; - struct k_clock clock_monotonic_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_monotonic_coarse, - }; - struct k_clock clock_tai = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_get_tai, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, - }; - struct k_clock clock_boottime = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_get_boottime, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, - }; - - posix_timers_register_clock(CLOCK_REALTIME, &clock_realtime); - posix_timers_register_clock(CLOCK_MONOTONIC, &clock_monotonic); - posix_timers_register_clock(CLOCK_MONOTONIC_RAW, &clock_monotonic_raw); - posix_timers_register_clock(CLOCK_REALTIME_COARSE, &clock_realtime_coarse); - posix_timers_register_clock(CLOCK_MONOTONIC_COARSE, &clock_monotonic_coarse); - posix_timers_register_clock(CLOCK_BOOTTIME, &clock_boottime); - posix_timers_register_clock(CLOCK_TAI, &clock_tai); - posix_timers_cache = kmem_cache_create("posix_timers_cache", sizeof (struct k_itimer), 0, SLAB_PANIC, NULL); @@ -521,30 +532,6 @@ static struct pid *good_sigevent(sigevent_t * event) return task_pid(rtn); } -void posix_timers_register_clock(const clockid_t clock_id, - struct k_clock *new_clock) -{ - if ((unsigned) clock_id >= MAX_CLOCKS) { - printk(KERN_WARNING "POSIX clock register failed for clock_id %d\n", - clock_id); - return; - } - - if (!new_clock->clock_get) { - printk(KERN_WARNING "POSIX clock id %d lacks clock_get()\n", - clock_id); - return; - } - if (!new_clock->clock_getres) { - printk(KERN_WARNING "POSIX clock id %d lacks clock_getres()\n", - clock_id); - return; - } - - posix_clocks[clock_id] = *new_clock; -} -EXPORT_SYMBOL_GPL(posix_timers_register_clock); - static struct k_itimer * alloc_posix_timer(void) { struct k_itimer *tmr; @@ -581,15 +568,15 @@ static void release_posix_timer(struct k_itimer *tmr, int it_id_set) call_rcu(&tmr->it.rcu, k_itimer_rcu_free); } -static struct k_clock *clockid_to_kclock(const clockid_t id) +static const struct k_clock *clockid_to_kclock(const clockid_t id) { if (id < 0) return (id & CLOCKFD_MASK) == CLOCKFD ? &clock_posix_dynamic : &clock_posix_cpu; - if (id >= MAX_CLOCKS || !posix_clocks[id].clock_getres) + if (id >= ARRAY_SIZE(posix_clocks) || !posix_clocks[id]) return NULL; - return &posix_clocks[id]; + return posix_clocks[id]; } static int common_timer_create(struct k_itimer *new_timer) @@ -604,7 +591,7 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock, struct sigevent __user *, timer_event_spec, timer_t __user *, created_timer_id) { - struct k_clock *kc = clockid_to_kclock(which_clock); + const struct k_clock *kc = clockid_to_kclock(which_clock); struct k_itimer *new_timer; int error, new_timer_id; sigevent_t event; @@ -781,7 +768,7 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, struct itimerspec64 cur_setting64; struct itimerspec cur_setting; struct k_itimer *timr; - struct k_clock *kc; + const struct k_clock *kc; unsigned long flags; int ret = 0; @@ -890,7 +877,7 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, struct itimerspec new_spec, old_spec; struct k_itimer *timr; unsigned long flag; - struct k_clock *kc; + const struct k_clock *kc; int error = 0; if (!new_setting) @@ -939,7 +926,7 @@ static int common_timer_del(struct k_itimer *timer) static inline int timer_delete_hook(struct k_itimer *timer) { - struct k_clock *kc = clockid_to_kclock(timer->it_clock); + const struct k_clock *kc = clockid_to_kclock(timer->it_clock); if (WARN_ON_ONCE(!kc || !kc->timer_del)) return -EINVAL; @@ -1018,7 +1005,7 @@ void exit_itimers(struct signal_struct *sig) SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, const struct timespec __user *, tp) { - struct k_clock *kc = clockid_to_kclock(which_clock); + const struct k_clock *kc = clockid_to_kclock(which_clock); struct timespec64 new_tp64; struct timespec new_tp; @@ -1035,7 +1022,7 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, struct timespec __user *,tp) { - struct k_clock *kc = clockid_to_kclock(which_clock); + const struct k_clock *kc = clockid_to_kclock(which_clock); struct timespec64 kernel_tp64; struct timespec kernel_tp; int error; @@ -1055,7 +1042,7 @@ SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, struct timex __user *, utx) { - struct k_clock *kc = clockid_to_kclock(which_clock); + const struct k_clock *kc = clockid_to_kclock(which_clock); struct timex ktx; int err; @@ -1078,7 +1065,7 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct timespec __user *, tp) { - struct k_clock *kc = clockid_to_kclock(which_clock); + const struct k_clock *kc = clockid_to_kclock(which_clock); struct timespec64 rtn_tp64; struct timespec rtn_tp; int error; @@ -1110,7 +1097,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, const struct timespec __user *, rqtp, struct timespec __user *, rmtp) { - struct k_clock *kc = clockid_to_kclock(which_clock); + const struct k_clock *kc = clockid_to_kclock(which_clock); struct timespec64 t64; struct timespec t; @@ -1136,7 +1123,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, long clock_nanosleep_restart(struct restart_block *restart_block) { clockid_t which_clock = restart_block->nanosleep.clockid; - struct k_clock *kc = clockid_to_kclock(which_clock); + const struct k_clock *kc = clockid_to_kclock(which_clock); if (WARN_ON_ONCE(!kc || !kc->nsleep_restart)) return -EINVAL; -- cgit v1.2.3-58-ga151 From b6b3b80fceb175c825ad6c72659e0a72e201fc5f Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sat, 27 May 2017 12:23:47 +0200 Subject: alarmtimer: Fix posix-timer constification fallout Some freezer related variables are only used when either CONFIG_POSIX_TIMER or CONFIG_RTC_CLASS are enabled. Hide them when both are off. Fixes: d3ba5a9a345b ("posix-timers: Make posix_clocks immutable") Reported-by: Ingo Molnar Signed-off-by: Thomas Gleixner Cc: Christoph Helwig --- kernel/time/alarmtimer.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 4f4cc3509b30..4cfebfff848d 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -45,11 +45,13 @@ static struct alarm_base { clockid_t base_clockid; } alarm_bases[ALARM_NUMTYPE]; +#if defined(CONFIG_POSIX_TIMERS) || defined(CONFIG_RTC_CLASS) /* freezer information to handle clock_nanosleep triggered wakeups */ static enum alarmtimer_type freezer_alarmtype; static ktime_t freezer_expires; static ktime_t freezer_delta; static DEFINE_SPINLOCK(freezer_delta_lock); +#endif static struct wakeup_source *ws; -- cgit v1.2.3-58-ga151 From f822798e3ced63427d57d128ee8d118126455f84 Mon Sep 17 00:00:00 2001 From: Dimitri Sivanich Date: Fri, 26 May 2017 23:30:52 +0200 Subject: posix-timers: Remove mmtimer leftovers After removing mmtimer, the mmtimer struct can be removed from the k_itimer struct. Signed-off-by: Thomas Gleixner Cc: Russ Anderson Cc: Dimitri Sivanich Cc: Mike Travis Cc: Nate Zimmer Cc: Christoph Hellwig Link: http://lkml.kernel.org/r/20170526130534.GE30788@hpe.com --- include/linux/posix-timers.h | 6 ------ 1 file changed, 6 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index b313ef2e7385..34e893a75771 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -72,12 +72,6 @@ struct k_itimer { ktime_t interval; } real; struct cpu_timer_list cpu; - struct { - unsigned int clock; - unsigned int node; - unsigned long incr; - unsigned long expires; - } mmtimer; struct { struct alarm alarmtimer; ktime_t interval; -- cgit v1.2.3-58-ga151 From f70c80068f073ace4b9071803d2e2691fe0c3d05 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 3 Jun 2017 21:00:58 +0200 Subject: sparc: Simplify There is no need for the forward declaration of compat_siginfo provided here. We can't yet use the generic header as we need to pull in the sparc-specific version of the uapi , but this prepares for removing the non-uapi entirely. Signed-off-by: Christoph Hellwig Acked-by: "David S. Miller" Signed-off-by: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: Fenghua Yu Cc: Tony Luck Cc: linux-ia64@vger.kernel.org Cc: Arnd Bergmann Cc: sparclinux@vger.kernel.org Link: http://lkml.kernel.org/r/20170603190102.28866-2-hch@lst.de --- arch/sparc/include/asm/siginfo.h | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/arch/sparc/include/asm/siginfo.h b/arch/sparc/include/asm/siginfo.h index 48c34c19f810..dd2f2fce976b 100644 --- a/arch/sparc/include/asm/siginfo.h +++ b/arch/sparc/include/asm/siginfo.h @@ -1,13 +1 @@ -#ifndef __SPARC_SIGINFO_H -#define __SPARC_SIGINFO_H - #include - - -#ifdef CONFIG_COMPAT - -struct compat_siginfo; - -#endif /* CONFIG_COMPAT */ - -#endif /* !(__SPARC_SIGINFO_H) */ -- cgit v1.2.3-58-ga151 From 7994200ce69a3873dfa2641254a13bb0a40056f3 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 3 Jun 2017 21:00:59 +0200 Subject: ia64: Remove HAVE_ARCH_COPY_SIGINFO Since ia64 defines __ARCH_SI_PREAMBLE_SIZE it can just use the generic copy_siginfo implementation, which is identical to the architecture specific one. With that support for HAVE_ARCH_COPY_SIGINFO can go away entirely. Signed-off-by: Christoph Hellwig Signed-off-by: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: Fenghua Yu Cc: Tony Luck Cc: linux-ia64@vger.kernel.org Cc: Arnd Bergmann Cc: sparclinux@vger.kernel.org Cc: "David S. Miller" Link: http://lkml.kernel.org/r/20170603190102.28866-3-hch@lst.de --- arch/ia64/include/asm/siginfo.h | 22 ---------------------- arch/ia64/include/uapi/asm/siginfo.h | 1 - include/linux/signal.h | 7 +------ 3 files changed, 1 insertion(+), 29 deletions(-) diff --git a/arch/ia64/include/asm/siginfo.h b/arch/ia64/include/asm/siginfo.h index 6f2e2dd0f28f..dd2f2fce976b 100644 --- a/arch/ia64/include/asm/siginfo.h +++ b/arch/ia64/include/asm/siginfo.h @@ -1,23 +1 @@ -/* - * Based on . - * - * Modified 1998-2002 - * David Mosberger-Tang , Hewlett-Packard Co - */ -#ifndef _ASM_IA64_SIGINFO_H -#define _ASM_IA64_SIGINFO_H - -#include #include - -static inline void -copy_siginfo (siginfo_t *to, siginfo_t *from) -{ - if (from->si_code < 0) - memcpy(to, from, sizeof(siginfo_t)); - else - /* _sigchld is currently the largest know union member */ - memcpy(to, from, 4*sizeof(int) + sizeof(from->_sifields._sigchld)); -} - -#endif /* _ASM_IA64_SIGINFO_H */ diff --git a/arch/ia64/include/uapi/asm/siginfo.h b/arch/ia64/include/uapi/asm/siginfo.h index f72bf0172bb2..4694c64252d6 100644 --- a/arch/ia64/include/uapi/asm/siginfo.h +++ b/arch/ia64/include/uapi/asm/siginfo.h @@ -11,7 +11,6 @@ #define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int)) #define HAVE_ARCH_SIGINFO_T -#define HAVE_ARCH_COPY_SIGINFO #define HAVE_ARCH_COPY_SIGINFO_TO_USER #include diff --git a/include/linux/signal.h b/include/linux/signal.h index 1f5a16620693..80c7418be359 100644 --- a/include/linux/signal.h +++ b/include/linux/signal.h @@ -3,16 +3,13 @@ #include #include +#include struct task_struct; /* for sysctl */ extern int print_fatal_signals; -#ifndef HAVE_ARCH_COPY_SIGINFO - -#include - static inline void copy_siginfo(struct siginfo *to, struct siginfo *from) { if (from->si_code < 0) @@ -22,8 +19,6 @@ static inline void copy_siginfo(struct siginfo *to, struct siginfo *from) memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld)); } -#endif - /* * Define some primitives to manipulate sigset_t. */ -- cgit v1.2.3-58-ga151 From 31ea70e0308b73a1b862bd17c06efc3cbcfd2016 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 3 Jun 2017 21:01:00 +0200 Subject: posix-timers: Move the do_schedule_next_timer declaration Having it in asm-generic/siginfo.h doesn't make any sense as it is in no way architecture specific. Move it to posix-timers.h instead. Signed-off-by: Christoph Hellwig Signed-off-by: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: Fenghua Yu Cc: Tony Luck Cc: linux-ia64@vger.kernel.org Cc: Arnd Bergmann Cc: sparclinux@vger.kernel.org Cc: "David S. Miller" Link: http://lkml.kernel.org/r/20170603190102.28866-4-hch@lst.de --- include/asm-generic/siginfo.h | 1 - include/linux/posix-timers.h | 3 +++ kernel/signal.c | 1 + 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h index a2508a8f9a9c..5a9394763a66 100644 --- a/include/asm-generic/siginfo.h +++ b/include/asm-generic/siginfo.h @@ -15,7 +15,6 @@ #define __SI_CODE(T,N) ((T) | ((N) & 0xffff)) struct siginfo; -void do_schedule_next_timer(struct siginfo *info); extern int copy_siginfo_to_user(struct siginfo __user *to, const struct siginfo *from); diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 34e893a75771..8929f7e8f452 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -7,6 +7,7 @@ #include #include +struct siginfo; struct cpu_timer_list { struct list_head entry; @@ -120,4 +121,6 @@ long clock_nanosleep_restart(struct restart_block *restart_block); void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new); +void do_schedule_next_timer(struct siginfo *info); + #endif diff --git a/kernel/signal.c b/kernel/signal.c index ca92bcfeb322..1f85c843be8e 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -39,6 +39,7 @@ #include #include #include +#include #define CREATE_TRACE_POINTS #include -- cgit v1.2.3-58-ga151 From b9253a43370e8f3c46c0ee24b04fa2ffec37b7c0 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 3 Jun 2017 21:01:01 +0200 Subject: signal: Move copy_siginfo_to_user to Having it in asm-generic/siginfo.h doesn't make any sense as it is in no way architecture specific. Move it to signal.h instead where several related functions already reside. Signed-off-by: Christoph Hellwig Signed-off-by: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: Fenghua Yu Cc: Tony Luck Cc: linux-ia64@vger.kernel.org Cc: Arnd Bergmann Cc: sparclinux@vger.kernel.org Cc: "David S. Miller" Link: http://lkml.kernel.org/r/20170603190102.28866-5-hch@lst.de --- include/asm-generic/siginfo.h | 4 ---- include/linux/signal.h | 2 ++ 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h index 5a9394763a66..31268a5bf63e 100644 --- a/include/asm-generic/siginfo.h +++ b/include/asm-generic/siginfo.h @@ -14,8 +14,4 @@ #define __SI_SYS (7 << 16) #define __SI_CODE(T,N) ((T) | ((N) & 0xffff)) -struct siginfo; - -extern int copy_siginfo_to_user(struct siginfo __user *to, const struct siginfo *from); - #endif diff --git a/include/linux/signal.h b/include/linux/signal.h index 80c7418be359..a39feddd71ba 100644 --- a/include/linux/signal.h +++ b/include/linux/signal.h @@ -19,6 +19,8 @@ static inline void copy_siginfo(struct siginfo *to, struct siginfo *from) memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld)); } +int copy_siginfo_to_user(struct siginfo __user *to, const struct siginfo *from); + /* * Define some primitives to manipulate sigset_t. */ -- cgit v1.2.3-58-ga151 From 6bc51cbaa9d75c7c240282da5ff270815caccac0 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 3 Jun 2017 21:01:02 +0200 Subject: signal: Remove non-uapi By moving the kernel side __SI_* defintions right next to the userspace ones we can kill the non-uapi versions of include include/asm-generic/siginfo.h and untangle the unholy mess of includes. [ tglx: Removed uapi/asm/siginfo.h from m32r, microblaze, mn10300 and score ] Signed-off-by: Christoph Hellwig Signed-off-by: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: Fenghua Yu Cc: Tony Luck Cc: linux-ia64@vger.kernel.org Cc: Arnd Bergmann Cc: sparclinux@vger.kernel.org Cc: "David S. Miller" Link: http://lkml.kernel.org/r/20170603190102.28866-6-hch@lst.de --- arch/arc/include/asm/Kbuild | 1 - arch/arc/include/uapi/asm/Kbuild | 2 ++ arch/arm/include/asm/Kbuild | 1 - arch/arm/include/uapi/asm/Kbuild | 2 ++ arch/c6x/include/asm/Kbuild | 1 - arch/c6x/include/uapi/asm/Kbuild | 1 + arch/cris/include/asm/Kbuild | 1 - arch/cris/include/uapi/asm/Kbuild | 2 ++ arch/h8300/include/asm/Kbuild | 1 - arch/h8300/include/uapi/asm/Kbuild | 2 ++ arch/hexagon/include/asm/Kbuild | 1 - arch/hexagon/include/uapi/asm/Kbuild | 2 ++ arch/ia64/include/asm/siginfo.h | 1 - arch/m32r/include/uapi/asm/Kbuild | 2 ++ arch/m32r/include/uapi/asm/siginfo.h | 6 ------ arch/m68k/include/asm/Kbuild | 1 - arch/m68k/include/uapi/asm/Kbuild | 1 + arch/microblaze/include/uapi/asm/Kbuild | 1 + arch/microblaze/include/uapi/asm/siginfo.h | 1 - arch/mn10300/include/uapi/asm/Kbuild | 2 ++ arch/mn10300/include/uapi/asm/siginfo.h | 1 - arch/nios2/include/asm/Kbuild | 1 - arch/nios2/include/uapi/asm/Kbuild | 1 + arch/openrisc/include/asm/Kbuild | 1 - arch/openrisc/include/uapi/asm/Kbuild | 2 ++ arch/score/include/uapi/asm/Kbuild | 2 ++ arch/score/include/uapi/asm/siginfo.h | 6 ------ arch/sh/include/asm/Kbuild | 1 - arch/sh/include/uapi/asm/Kbuild | 2 ++ arch/sparc/include/asm/siginfo.h | 1 - arch/unicore32/include/asm/Kbuild | 1 - arch/unicore32/include/uapi/asm/Kbuild | 1 + arch/xtensa/include/asm/Kbuild | 1 - arch/xtensa/include/uapi/asm/Kbuild | 1 + include/asm-generic/siginfo.h | 17 ----------------- include/uapi/asm-generic/siginfo.h | 15 +++++++++++++-- 36 files changed, 39 insertions(+), 47 deletions(-) delete mode 100644 arch/ia64/include/asm/siginfo.h delete mode 100644 arch/m32r/include/uapi/asm/siginfo.h delete mode 100644 arch/microblaze/include/uapi/asm/siginfo.h delete mode 100644 arch/mn10300/include/uapi/asm/siginfo.h delete mode 100644 arch/score/include/uapi/asm/siginfo.h delete mode 100644 arch/sparc/include/asm/siginfo.h delete mode 100644 include/asm-generic/siginfo.h diff --git a/arch/arc/include/asm/Kbuild b/arch/arc/include/asm/Kbuild index 7bee4e4799fd..3e74ca5e6402 100644 --- a/arch/arc/include/asm/Kbuild +++ b/arch/arc/include/asm/Kbuild @@ -36,7 +36,6 @@ generic-y += preempt.h generic-y += resource.h generic-y += sembuf.h generic-y += shmbuf.h -generic-y += siginfo.h generic-y += socket.h generic-y += sockios.h generic-y += stat.h diff --git a/arch/arc/include/uapi/asm/Kbuild b/arch/arc/include/uapi/asm/Kbuild index b15bf6bc0e94..b55fc2ae1e8c 100644 --- a/arch/arc/include/uapi/asm/Kbuild +++ b/arch/arc/include/uapi/asm/Kbuild @@ -1,2 +1,4 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm + +generic-y += siginfo.h diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild index 3a36d99ff836..d8360501c082 100644 --- a/arch/arm/include/asm/Kbuild +++ b/arch/arm/include/asm/Kbuild @@ -28,7 +28,6 @@ generic-y += segment.h generic-y += sembuf.h generic-y += serial.h generic-y += shmbuf.h -generic-y += siginfo.h generic-y += simd.h generic-y += sizes.h generic-y += socket.h diff --git a/arch/arm/include/uapi/asm/Kbuild b/arch/arm/include/uapi/asm/Kbuild index 607f702c2d62..e9b098d6b766 100644 --- a/arch/arm/include/uapi/asm/Kbuild +++ b/arch/arm/include/uapi/asm/Kbuild @@ -4,3 +4,5 @@ include include/uapi/asm-generic/Kbuild.asm genhdr-y += unistd-common.h genhdr-y += unistd-oabi.h genhdr-y += unistd-eabi.h + +generic-y += siginfo.h diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild index f0eaf0475e7e..a3c8d05c4cc7 100644 --- a/arch/c6x/include/asm/Kbuild +++ b/arch/c6x/include/asm/Kbuild @@ -45,7 +45,6 @@ generic-y += sembuf.h generic-y += serial.h generic-y += shmbuf.h generic-y += shmparam.h -generic-y += siginfo.h generic-y += signal.h generic-y += socket.h generic-y += sockios.h diff --git a/arch/c6x/include/uapi/asm/Kbuild b/arch/c6x/include/uapi/asm/Kbuild index 13a97aa2285f..1c44d3b3eba0 100644 --- a/arch/c6x/include/uapi/asm/Kbuild +++ b/arch/c6x/include/uapi/asm/Kbuild @@ -2,3 +2,4 @@ include include/uapi/asm-generic/Kbuild.asm generic-y += kvm_para.h +generic-y += siginfo.h diff --git a/arch/cris/include/asm/Kbuild b/arch/cris/include/asm/Kbuild index 2890099992a9..acc5781100c2 100644 --- a/arch/cris/include/asm/Kbuild +++ b/arch/cris/include/asm/Kbuild @@ -36,7 +36,6 @@ generic-y += resource.h generic-y += sections.h generic-y += sembuf.h generic-y += shmbuf.h -generic-y += siginfo.h generic-y += socket.h generic-y += sockios.h generic-y += statfs.h diff --git a/arch/cris/include/uapi/asm/Kbuild b/arch/cris/include/uapi/asm/Kbuild index b15bf6bc0e94..b55fc2ae1e8c 100644 --- a/arch/cris/include/uapi/asm/Kbuild +++ b/arch/cris/include/uapi/asm/Kbuild @@ -1,2 +1,4 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm + +generic-y += siginfo.h diff --git a/arch/h8300/include/asm/Kbuild b/arch/h8300/include/asm/Kbuild index 757cdeb24e6e..99c824608a31 100644 --- a/arch/h8300/include/asm/Kbuild +++ b/arch/h8300/include/asm/Kbuild @@ -54,7 +54,6 @@ generic-y += serial.h generic-y += setup.h generic-y += shmbuf.h generic-y += shmparam.h -generic-y += siginfo.h generic-y += sizes.h generic-y += socket.h generic-y += sockios.h diff --git a/arch/h8300/include/uapi/asm/Kbuild b/arch/h8300/include/uapi/asm/Kbuild index b15bf6bc0e94..b55fc2ae1e8c 100644 --- a/arch/h8300/include/uapi/asm/Kbuild +++ b/arch/h8300/include/uapi/asm/Kbuild @@ -1,2 +1,4 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm + +generic-y += siginfo.h diff --git a/arch/hexagon/include/asm/Kbuild b/arch/hexagon/include/asm/Kbuild index 6b45ef79eb8f..0fc9cb04e6ad 100644 --- a/arch/hexagon/include/asm/Kbuild +++ b/arch/hexagon/include/asm/Kbuild @@ -41,7 +41,6 @@ generic-y += sembuf.h generic-y += serial.h generic-y += shmbuf.h generic-y += shmparam.h -generic-y += siginfo.h generic-y += sizes.h generic-y += socket.h generic-y += sockios.h diff --git a/arch/hexagon/include/uapi/asm/Kbuild b/arch/hexagon/include/uapi/asm/Kbuild index b15bf6bc0e94..b55fc2ae1e8c 100644 --- a/arch/hexagon/include/uapi/asm/Kbuild +++ b/arch/hexagon/include/uapi/asm/Kbuild @@ -1,2 +1,4 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm + +generic-y += siginfo.h diff --git a/arch/ia64/include/asm/siginfo.h b/arch/ia64/include/asm/siginfo.h deleted file mode 100644 index dd2f2fce976b..000000000000 --- a/arch/ia64/include/asm/siginfo.h +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/arch/m32r/include/uapi/asm/Kbuild b/arch/m32r/include/uapi/asm/Kbuild index b15bf6bc0e94..c94ee54210bc 100644 --- a/arch/m32r/include/uapi/asm/Kbuild +++ b/arch/m32r/include/uapi/asm/Kbuild @@ -1,2 +1,4 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm + +generic-y += siginfo.h diff --git a/arch/m32r/include/uapi/asm/siginfo.h b/arch/m32r/include/uapi/asm/siginfo.h deleted file mode 100644 index 7d9cd9ebfd0e..000000000000 --- a/arch/m32r/include/uapi/asm/siginfo.h +++ /dev/null @@ -1,6 +0,0 @@ -#ifndef _M32R_SIGINFO_H -#define _M32R_SIGINFO_H - -#include - -#endif /* _M32R_SIGINFO_H */ diff --git a/arch/m68k/include/asm/Kbuild b/arch/m68k/include/asm/Kbuild index 82005d2ff717..5ecf4e47b2e2 100644 --- a/arch/m68k/include/asm/Kbuild +++ b/arch/m68k/include/asm/Kbuild @@ -25,7 +25,6 @@ generic-y += preempt.h generic-y += resource.h generic-y += sections.h generic-y += shmparam.h -generic-y += siginfo.h generic-y += spinlock.h generic-y += statfs.h generic-y += termios.h diff --git a/arch/m68k/include/uapi/asm/Kbuild b/arch/m68k/include/uapi/asm/Kbuild index 64368077235a..68b45cc87e2c 100644 --- a/arch/m68k/include/uapi/asm/Kbuild +++ b/arch/m68k/include/uapi/asm/Kbuild @@ -5,6 +5,7 @@ generic-y += auxvec.h generic-y += msgbuf.h generic-y += sembuf.h generic-y += shmbuf.h +generic-y += siginfo.h generic-y += socket.h generic-y += sockios.h generic-y += termbits.h diff --git a/arch/microblaze/include/uapi/asm/Kbuild b/arch/microblaze/include/uapi/asm/Kbuild index 2178c78c7c1a..cb6784f4a427 100644 --- a/arch/microblaze/include/uapi/asm/Kbuild +++ b/arch/microblaze/include/uapi/asm/Kbuild @@ -2,3 +2,4 @@ include include/uapi/asm-generic/Kbuild.asm generic-y += types.h +generic-y += siginfo.h diff --git a/arch/microblaze/include/uapi/asm/siginfo.h b/arch/microblaze/include/uapi/asm/siginfo.h deleted file mode 100644 index 0815d29d82e5..000000000000 --- a/arch/microblaze/include/uapi/asm/siginfo.h +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/arch/mn10300/include/uapi/asm/Kbuild b/arch/mn10300/include/uapi/asm/Kbuild index b15bf6bc0e94..c94ee54210bc 100644 --- a/arch/mn10300/include/uapi/asm/Kbuild +++ b/arch/mn10300/include/uapi/asm/Kbuild @@ -1,2 +1,4 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm + +generic-y += siginfo.h diff --git a/arch/mn10300/include/uapi/asm/siginfo.h b/arch/mn10300/include/uapi/asm/siginfo.h deleted file mode 100644 index 0815d29d82e5..000000000000 --- a/arch/mn10300/include/uapi/asm/siginfo.h +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/arch/nios2/include/asm/Kbuild b/arch/nios2/include/asm/Kbuild index 727dbb333f60..e1a843def56f 100644 --- a/arch/nios2/include/asm/Kbuild +++ b/arch/nios2/include/asm/Kbuild @@ -47,7 +47,6 @@ generic-y += segment.h generic-y += sembuf.h generic-y += serial.h generic-y += shmbuf.h -generic-y += siginfo.h generic-y += signal.h generic-y += socket.h generic-y += sockios.h diff --git a/arch/nios2/include/uapi/asm/Kbuild b/arch/nios2/include/uapi/asm/Kbuild index 374bd123329f..51eff5bc2eb4 100644 --- a/arch/nios2/include/uapi/asm/Kbuild +++ b/arch/nios2/include/uapi/asm/Kbuild @@ -2,4 +2,5 @@ include include/uapi/asm-generic/Kbuild.asm generic-y += setup.h +generic-y += siginfo.h generic-y += ucontext.h diff --git a/arch/openrisc/include/asm/Kbuild b/arch/openrisc/include/asm/Kbuild index fdbcf0bf44a4..091585addb91 100644 --- a/arch/openrisc/include/asm/Kbuild +++ b/arch/openrisc/include/asm/Kbuild @@ -46,7 +46,6 @@ generic-y += sembuf.h generic-y += setup.h generic-y += shmbuf.h generic-y += shmparam.h -generic-y += siginfo.h generic-y += signal.h generic-y += socket.h generic-y += sockios.h diff --git a/arch/openrisc/include/uapi/asm/Kbuild b/arch/openrisc/include/uapi/asm/Kbuild index b15bf6bc0e94..b55fc2ae1e8c 100644 --- a/arch/openrisc/include/uapi/asm/Kbuild +++ b/arch/openrisc/include/uapi/asm/Kbuild @@ -1,2 +1,4 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm + +generic-y += siginfo.h diff --git a/arch/score/include/uapi/asm/Kbuild b/arch/score/include/uapi/asm/Kbuild index b15bf6bc0e94..c94ee54210bc 100644 --- a/arch/score/include/uapi/asm/Kbuild +++ b/arch/score/include/uapi/asm/Kbuild @@ -1,2 +1,4 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm + +generic-y += siginfo.h diff --git a/arch/score/include/uapi/asm/siginfo.h b/arch/score/include/uapi/asm/siginfo.h deleted file mode 100644 index 87ca35607a28..000000000000 --- a/arch/score/include/uapi/asm/siginfo.h +++ /dev/null @@ -1,6 +0,0 @@ -#ifndef _ASM_SCORE_SIGINFO_H -#define _ASM_SCORE_SIGINFO_H - -#include - -#endif /* _ASM_SCORE_SIGINFO_H */ diff --git a/arch/sh/include/asm/Kbuild b/arch/sh/include/asm/Kbuild index cf2a75063b53..590c91ae7541 100644 --- a/arch/sh/include/asm/Kbuild +++ b/arch/sh/include/asm/Kbuild @@ -29,7 +29,6 @@ generic-y += rwsem.h generic-y += sembuf.h generic-y += serial.h generic-y += shmbuf.h -generic-y += siginfo.h generic-y += sizes.h generic-y += socket.h generic-y += statfs.h diff --git a/arch/sh/include/uapi/asm/Kbuild b/arch/sh/include/uapi/asm/Kbuild index b15bf6bc0e94..b55fc2ae1e8c 100644 --- a/arch/sh/include/uapi/asm/Kbuild +++ b/arch/sh/include/uapi/asm/Kbuild @@ -1,2 +1,4 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm + +generic-y += siginfo.h diff --git a/arch/sparc/include/asm/siginfo.h b/arch/sparc/include/asm/siginfo.h deleted file mode 100644 index dd2f2fce976b..000000000000 --- a/arch/sparc/include/asm/siginfo.h +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/arch/unicore32/include/asm/Kbuild b/arch/unicore32/include/asm/Kbuild index e9ad511c1043..7a53a55341de 100644 --- a/arch/unicore32/include/asm/Kbuild +++ b/arch/unicore32/include/asm/Kbuild @@ -44,7 +44,6 @@ generic-y += serial.h generic-y += setup.h generic-y += shmbuf.h generic-y += shmparam.h -generic-y += siginfo.h generic-y += signal.h generic-y += sizes.h generic-y += socket.h diff --git a/arch/unicore32/include/uapi/asm/Kbuild b/arch/unicore32/include/uapi/asm/Kbuild index 13a97aa2285f..1c44d3b3eba0 100644 --- a/arch/unicore32/include/uapi/asm/Kbuild +++ b/arch/unicore32/include/uapi/asm/Kbuild @@ -2,3 +2,4 @@ include include/uapi/asm-generic/Kbuild.asm generic-y += kvm_para.h +generic-y += siginfo.h diff --git a/arch/xtensa/include/asm/Kbuild b/arch/xtensa/include/asm/Kbuild index cc23e9ecc6bb..30f6290109d4 100644 --- a/arch/xtensa/include/asm/Kbuild +++ b/arch/xtensa/include/asm/Kbuild @@ -25,7 +25,6 @@ generic-y += preempt.h generic-y += resource.h generic-y += rwsem.h generic-y += sections.h -generic-y += siginfo.h generic-y += statfs.h generic-y += termios.h generic-y += topology.h diff --git a/arch/xtensa/include/uapi/asm/Kbuild b/arch/xtensa/include/uapi/asm/Kbuild index b15bf6bc0e94..4cb0d2f8868c 100644 --- a/arch/xtensa/include/uapi/asm/Kbuild +++ b/arch/xtensa/include/uapi/asm/Kbuild @@ -1,2 +1,3 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm +generic-y += siginfo.h diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h deleted file mode 100644 index 31268a5bf63e..000000000000 --- a/include/asm-generic/siginfo.h +++ /dev/null @@ -1,17 +0,0 @@ -#ifndef _ASM_GENERIC_SIGINFO_H -#define _ASM_GENERIC_SIGINFO_H - -#include - -#define __SI_MASK 0xffff0000u -#define __SI_KILL (0 << 16) -#define __SI_TIMER (1 << 16) -#define __SI_POLL (2 << 16) -#define __SI_FAULT (3 << 16) -#define __SI_CHLD (4 << 16) -#define __SI_RT (5 << 16) -#define __SI_MESGQ (6 << 16) -#define __SI_SYS (7 << 16) -#define __SI_CODE(T,N) ((T) | ((N) & 0xffff)) - -#endif diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h index 1abaf62c86fc..9c4eca6b374a 100644 --- a/include/uapi/asm-generic/siginfo.h +++ b/include/uapi/asm-generic/siginfo.h @@ -151,7 +151,18 @@ typedef struct siginfo { #define si_arch _sifields._sigsys._arch #endif -#ifndef __KERNEL__ +#ifdef __KERNEL__ +#define __SI_MASK 0xffff0000u +#define __SI_KILL (0 << 16) +#define __SI_TIMER (1 << 16) +#define __SI_POLL (2 << 16) +#define __SI_FAULT (3 << 16) +#define __SI_CHLD (4 << 16) +#define __SI_RT (5 << 16) +#define __SI_MESGQ (6 << 16) +#define __SI_SYS (7 << 16) +#define __SI_CODE(T,N) ((T) | ((N) & 0xffff)) +#else /* __KERNEL__ */ #define __SI_KILL 0 #define __SI_TIMER 0 #define __SI_POLL 0 @@ -161,7 +172,7 @@ typedef struct siginfo { #define __SI_MESGQ 0 #define __SI_SYS 0 #define __SI_CODE(T,N) (N) -#endif +#endif /* __KERNEL__ */ /* * si_code values -- cgit v1.2.3-58-ga151 From 18c700c4e3d0a37c43a2df8b8f740121d4dac645 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:36 +0200 Subject: alarmtimer: Remove pointless config conditional Having a IF_ENABLED(CONFIG_POSIX_TIMERS) inside of a #ifdef CONFIG_POSIX_TIMERS section is pointless. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211655.975218056@linutronix.de --- kernel/time/alarmtimer.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index e645dcc7d4ee..2a8675f9aac5 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -520,8 +520,7 @@ static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm, spin_lock_irqsave(&ptr->it_lock, flags); if ((ptr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) { - if (IS_ENABLED(CONFIG_POSIX_TIMERS) && - posix_timer_event(ptr, 0) != 0) + if (posix_timer_event(ptr, 0)) ptr->it_overrun++; } -- cgit v1.2.3-58-ga151 From a81129e5a189973abd661704b261f8aad9325407 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:37 +0200 Subject: posix-timers: Remove unused export of posix_timer_event() Since the removal of the mmtimer driver the export is not longer needed. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.052744418@linutronix.de --- kernel/time/posix-timers.c | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 0c0cccfa3586..44d486590e6e 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -442,7 +442,6 @@ int posix_timer_event(struct k_itimer *timr, int si_private) /* If we failed to send the signal the timer stops. */ return ret > 0; } -EXPORT_SYMBOL_GPL(posix_timer_event); /* * This function gets called when a POSIX.1b interval timer expires. It -- cgit v1.2.3-58-ga151 From 3a06c7ac24f9f24ec059cd77c2dbdf7fbfd0aaaf Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:38 +0200 Subject: posix-clocks: Remove interval timer facility and mmap/fasync callbacks The only user of this facility is ptp_clock, which does not implement any of those functions. Remove them to prevent accidental users. Especially the interval timer interfaces are now more or less impossible to implement because the necessary infrastructure has been confined to the core code. Aside of that it's really complex to make these callbacks implemented according to spec as the alarm timer implementation demonstrates. If at all then a nanosleep callback might be a reasonable extension. For now keep just what ptp_clock needs. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.145036286@linutronix.de --- include/linux/posix-clock.h | 22 --------- kernel/time/posix-clock.c | 113 -------------------------------------------- 2 files changed, 135 deletions(-) diff --git a/include/linux/posix-clock.h b/include/linux/posix-clock.h index 83b22ae9ae12..38d8225510f1 100644 --- a/include/linux/posix-clock.h +++ b/include/linux/posix-clock.h @@ -42,12 +42,6 @@ struct posix_clock; * @clock_gettime: Read the current time * @clock_getres: Get the clock resolution * @clock_settime: Set the current time value - * @timer_create: Create a new timer - * @timer_delete: Remove a previously created timer - * @timer_gettime: Get remaining time and interval of a timer - * @timer_settime: Set a timer's initial expiration and interval - * @fasync: Optional character device fasync method - * @mmap: Optional character device mmap method * @open: Optional character device open method * @release: Optional character device release method * @ioctl: Optional character device ioctl method @@ -66,28 +60,12 @@ struct posix_clock_operations { int (*clock_settime)(struct posix_clock *pc, const struct timespec64 *ts); - int (*timer_create) (struct posix_clock *pc, struct k_itimer *kit); - - int (*timer_delete) (struct posix_clock *pc, struct k_itimer *kit); - - void (*timer_gettime)(struct posix_clock *pc, - struct k_itimer *kit, struct itimerspec64 *tsp); - - int (*timer_settime)(struct posix_clock *pc, - struct k_itimer *kit, int flags, - struct itimerspec64 *tsp, struct itimerspec64 *old); /* * Optional character device methods: */ - int (*fasync) (struct posix_clock *pc, - int fd, struct file *file, int on); - long (*ioctl) (struct posix_clock *pc, unsigned int cmd, unsigned long arg); - int (*mmap) (struct posix_clock *pc, - struct vm_area_struct *vma); - int (*open) (struct posix_clock *pc, fmode_t f_mode); uint (*poll) (struct posix_clock *pc, diff --git a/kernel/time/posix-clock.c b/kernel/time/posix-clock.c index 7e453005e078..bd4fb785652f 100644 --- a/kernel/time/posix-clock.c +++ b/kernel/time/posix-clock.c @@ -82,38 +82,6 @@ static unsigned int posix_clock_poll(struct file *fp, poll_table *wait) return result; } -static int posix_clock_fasync(int fd, struct file *fp, int on) -{ - struct posix_clock *clk = get_posix_clock(fp); - int err = 0; - - if (!clk) - return -ENODEV; - - if (clk->ops.fasync) - err = clk->ops.fasync(clk, fd, fp, on); - - put_posix_clock(clk); - - return err; -} - -static int posix_clock_mmap(struct file *fp, struct vm_area_struct *vma) -{ - struct posix_clock *clk = get_posix_clock(fp); - int err = -ENODEV; - - if (!clk) - return -ENODEV; - - if (clk->ops.mmap) - err = clk->ops.mmap(clk, vma); - - put_posix_clock(clk); - - return err; -} - static long posix_clock_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) { @@ -199,8 +167,6 @@ static const struct file_operations posix_clock_file_operations = { .unlocked_ioctl = posix_clock_ioctl, .open = posix_clock_open, .release = posix_clock_release, - .fasync = posix_clock_fasync, - .mmap = posix_clock_mmap, #ifdef CONFIG_COMPAT .compat_ioctl = posix_clock_compat_ioctl, #endif @@ -359,88 +325,9 @@ out: return err; } -static int pc_timer_create(struct k_itimer *kit) -{ - clockid_t id = kit->it_clock; - struct posix_clock_desc cd; - int err; - - err = get_clock_desc(id, &cd); - if (err) - return err; - - if (cd.clk->ops.timer_create) - err = cd.clk->ops.timer_create(cd.clk, kit); - else - err = -EOPNOTSUPP; - - put_clock_desc(&cd); - - return err; -} - -static int pc_timer_delete(struct k_itimer *kit) -{ - clockid_t id = kit->it_clock; - struct posix_clock_desc cd; - int err; - - err = get_clock_desc(id, &cd); - if (err) - return err; - - if (cd.clk->ops.timer_delete) - err = cd.clk->ops.timer_delete(cd.clk, kit); - else - err = -EOPNOTSUPP; - - put_clock_desc(&cd); - - return err; -} - -static void pc_timer_gettime(struct k_itimer *kit, struct itimerspec64 *ts) -{ - clockid_t id = kit->it_clock; - struct posix_clock_desc cd; - - if (get_clock_desc(id, &cd)) - return; - - if (cd.clk->ops.timer_gettime) - cd.clk->ops.timer_gettime(cd.clk, kit, ts); - - put_clock_desc(&cd); -} - -static int pc_timer_settime(struct k_itimer *kit, int flags, - struct itimerspec64 *ts, struct itimerspec64 *old) -{ - clockid_t id = kit->it_clock; - struct posix_clock_desc cd; - int err; - - err = get_clock_desc(id, &cd); - if (err) - return err; - - if (cd.clk->ops.timer_settime) - err = cd.clk->ops.timer_settime(cd.clk, kit, flags, ts, old); - else - err = -EOPNOTSUPP; - - put_clock_desc(&cd); - - return err; -} - const struct k_clock clock_posix_dynamic = { .clock_getres = pc_clock_getres, .clock_set = pc_clock_settime, .clock_get = pc_clock_gettime, .clock_adj = pc_clock_adjtime, - .timer_create = pc_timer_create, - .timer_set = pc_timer_settime, - .timer_del = pc_timer_delete, - .timer_get = pc_timer_gettime, }; -- cgit v1.2.3-58-ga151 From 6631fa12c105e326bbe5fb215eb216e86c90d1ba Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:39 +0200 Subject: posix-timers: Avoid gazillions of forward declarations Move it below the actual implementations as there are new callbacks coming which would require even more forward declarations. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.238209952@linutronix.de --- kernel/time/posix-timers.c | 190 +++++++++++++++++++++------------------------ 1 file changed, 89 insertions(+), 101 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 44d486590e6e..b60b655dfbcd 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -69,6 +69,9 @@ static struct kmem_cache *posix_timers_cache; static DEFINE_HASHTABLE(posix_timers_hashtable, 9); static DEFINE_SPINLOCK(hash_lock); +static const struct k_clock * const posix_clocks[]; +static const struct k_clock *clockid_to_kclock(const clockid_t id); + /* * we assume that the new SIGEV_THREAD_ID shares no bits with the other * SIGEV values. Here we put out an error if this assumption fails. @@ -124,20 +127,6 @@ static DEFINE_SPINLOCK(hash_lock); * have is CLOCK_REALTIME and its high res counter part, both of * which we beg off on and pass to do_sys_settimeofday(). */ - -/* - * These ones are defined below. - */ -static int common_nsleep(const clockid_t, int flags, struct timespec64 *t, - struct timespec __user *rmtp); -static int common_timer_create(struct k_itimer *new_timer); -static void common_timer_get(struct k_itimer *, struct itimerspec64 *); -static int common_timer_set(struct k_itimer *, int, - struct itimerspec64 *, struct itimerspec64 *); -static int common_timer_del(struct k_itimer *timer); - -static enum hrtimer_restart posix_timer_fn(struct hrtimer *data); - static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags); #define lock_timer(tid, flags) \ @@ -278,82 +267,6 @@ static int posix_get_hrtimer_res(clockid_t which_clock, struct timespec64 *tp) return 0; } - -static const struct k_clock clock_realtime = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_clock_realtime_get, - .clock_set = posix_clock_realtime_set, - .clock_adj = posix_clock_realtime_adj, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, -}; - -static const struct k_clock clock_monotonic = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_ktime_get_ts, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, -}; - -static const struct k_clock clock_monotonic_raw = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_get_monotonic_raw, -}; - -static const struct k_clock clock_realtime_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_realtime_coarse, -}; - -static const struct k_clock clock_monotonic_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_monotonic_coarse, -}; - -static const struct k_clock clock_tai = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_get_tai, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, -}; - -static const struct k_clock clock_boottime = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_get_boottime, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, -}; - -static const struct k_clock * const posix_clocks[] = { - [CLOCK_REALTIME] = &clock_realtime, - [CLOCK_MONOTONIC] = &clock_monotonic, - [CLOCK_PROCESS_CPUTIME_ID] = &clock_process, - [CLOCK_THREAD_CPUTIME_ID] = &clock_thread, - [CLOCK_MONOTONIC_RAW] = &clock_monotonic_raw, - [CLOCK_REALTIME_COARSE] = &clock_realtime_coarse, - [CLOCK_MONOTONIC_COARSE] = &clock_monotonic_coarse, - [CLOCK_BOOTTIME] = &clock_boottime, - [CLOCK_REALTIME_ALARM] = &alarm_clock, - [CLOCK_BOOTTIME_ALARM] = &alarm_clock, - [CLOCK_TAI] = &clock_tai, -}; - /* * Initialize everything, well, just everything in Posix clocks/timers ;) */ @@ -567,17 +480,6 @@ static void release_posix_timer(struct k_itimer *tmr, int it_id_set) call_rcu(&tmr->it.rcu, k_itimer_rcu_free); } -static const struct k_clock *clockid_to_kclock(const clockid_t id) -{ - if (id < 0) - return (id & CLOCKFD_MASK) == CLOCKFD ? - &clock_posix_dynamic : &clock_posix_cpu; - - if (id >= ARRAY_SIZE(posix_clocks) || !posix_clocks[id]) - return NULL; - return posix_clocks[id]; -} - static int common_timer_create(struct k_itimer *new_timer) { hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0); @@ -1129,3 +1031,89 @@ long clock_nanosleep_restart(struct restart_block *restart_block) return kc->nsleep_restart(restart_block); } + +static const struct k_clock clock_realtime = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_clock_realtime_get, + .clock_set = posix_clock_realtime_set, + .clock_adj = posix_clock_realtime_adj, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, +}; + +static const struct k_clock clock_monotonic = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_ktime_get_ts, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, +}; + +static const struct k_clock clock_monotonic_raw = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_get_monotonic_raw, +}; + +static const struct k_clock clock_realtime_coarse = { + .clock_getres = posix_get_coarse_res, + .clock_get = posix_get_realtime_coarse, +}; + +static const struct k_clock clock_monotonic_coarse = { + .clock_getres = posix_get_coarse_res, + .clock_get = posix_get_monotonic_coarse, +}; + +static const struct k_clock clock_tai = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_get_tai, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, +}; + +static const struct k_clock clock_boottime = { + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_get_boottime, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, +}; + +static const struct k_clock * const posix_clocks[] = { + [CLOCK_REALTIME] = &clock_realtime, + [CLOCK_MONOTONIC] = &clock_monotonic, + [CLOCK_PROCESS_CPUTIME_ID] = &clock_process, + [CLOCK_THREAD_CPUTIME_ID] = &clock_thread, + [CLOCK_MONOTONIC_RAW] = &clock_monotonic_raw, + [CLOCK_REALTIME_COARSE] = &clock_realtime_coarse, + [CLOCK_MONOTONIC_COARSE] = &clock_monotonic_coarse, + [CLOCK_BOOTTIME] = &clock_boottime, + [CLOCK_REALTIME_ALARM] = &alarm_clock, + [CLOCK_BOOTTIME_ALARM] = &alarm_clock, + [CLOCK_TAI] = &clock_tai, +}; + +static const struct k_clock *clockid_to_kclock(const clockid_t id) +{ + if (id < 0) + return (id & CLOCKFD_MASK) == CLOCKFD ? + &clock_posix_dynamic : &clock_posix_cpu; + + if (id >= ARRAY_SIZE(posix_clocks) || !posix_clocks[id]) + return NULL; + return posix_clocks[id]; +} -- cgit v1.2.3-58-ga151 From 03676b41a8ffcbb1f6d9eb6ca754b2bfa431fd59 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:40 +0200 Subject: posix-timers: Cleanup struct k_itimer As a preparation for further changes, cleanup the formatting of the k_itimer structure and add kernel doc comments. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.316574129@linutronix.de --- include/linux/posix-timers.h | 61 +++++++++++++++++++++++++++++--------------- 1 file changed, 40 insertions(+), 21 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 8929f7e8f452..e06062c3967b 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -49,35 +49,54 @@ struct cpu_timer_list { #define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD) #define CLOCKID_TO_FD(clk) ((unsigned int) ~((clk) >> 3)) -/* POSIX.1b interval timer structure. */ -struct k_itimer { - struct list_head list; /* free/ allocate list */ - struct hlist_node t_hash; - spinlock_t it_lock; - clockid_t it_clock; /* which timer type */ - timer_t it_id; /* timer id */ - int it_overrun; /* overrun on pending signal */ - int it_overrun_last; /* overrun on last delivered signal */ - int it_requeue_pending; /* waiting to requeue this timer */ #define REQUEUE_PENDING 1 - int it_sigev_notify; /* notify word of sigevent struct */ - struct signal_struct *it_signal; + +/** + * struct k_itimer - POSIX.1b interval timer structure. + * @list: List head for binding the timer to signals->posix_timers + * @t_hash: Entry in the posix timer hash table + * @it_lock: Lock protecting the timer + * @it_clock: The posix timer clock id + * @it_id: The posix timer id for identifying the timer + * @it_overrun: The overrun counter for pending signals + * @it_overrun_last: The overrun at the time of the last delivered signal + * @it_requeue_pending: Indicator that timer waits for being requeued on + * signal delivery + * @it_sigev_notify: The notify word of sigevent struct for signal delivery + * @it_signal: Pointer to the creators signal struct + * @it_pid: The pid of the process/task targeted by the signal + * @it_process: The task to wakeup on clock_nanosleep (CPU timers) + * @sigq: Pointer to preallocated sigqueue + * @it: Union representing the various posix timer type + * internals. Also used for rcu freeing the timer. + */ +struct k_itimer { + struct list_head list; + struct hlist_node t_hash; + spinlock_t it_lock; + clockid_t it_clock; + timer_t it_id; + int it_overrun; + int it_overrun_last; + int it_requeue_pending; + int it_sigev_notify; + struct signal_struct *it_signal; union { - struct pid *it_pid; /* pid of process to send signal to */ - struct task_struct *it_process; /* for clock_nanosleep */ + struct pid *it_pid; + struct task_struct *it_process; }; - struct sigqueue *sigq; /* signal queue entry. */ + struct sigqueue *sigq; union { struct { - struct hrtimer timer; - ktime_t interval; + struct hrtimer timer; + ktime_t interval; } real; - struct cpu_timer_list cpu; + struct cpu_timer_list cpu; struct { - struct alarm alarmtimer; - ktime_t interval; + struct alarm alarmtimer; + ktime_t interval; } alarm; - struct rcu_head rcu; + struct rcu_head rcu; } it; }; -- cgit v1.2.3-58-ga151 From bab0aae9dcba9466dcc968b8bd21914f8f691631 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:41 +0200 Subject: posix-timers: Move posix-timer internals to core None of these declarations is required outside of kernel/time. Move them to an internal header. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Cc: Christoph Hellwig Link: http://lkml.kernel.org/r/20170530211656.394803853@linutronix.de --- include/linux/posix-timers.h | 30 ------------------------------ kernel/time/alarmtimer.c | 2 ++ kernel/time/posix-clock.c | 2 ++ kernel/time/posix-cpu-timers.c | 2 ++ kernel/time/posix-timers.c | 1 + kernel/time/posix-timers.h | 29 +++++++++++++++++++++++++++++ 6 files changed, 36 insertions(+), 30 deletions(-) create mode 100644 kernel/time/posix-timers.h diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index e06062c3967b..a372e7e3a396 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -100,36 +100,6 @@ struct k_itimer { } it; }; -struct k_clock { - int (*clock_getres) (const clockid_t which_clock, struct timespec64 *tp); - int (*clock_set) (const clockid_t which_clock, - const struct timespec64 *tp); - int (*clock_get) (const clockid_t which_clock, struct timespec64 *tp); - int (*clock_adj) (const clockid_t which_clock, struct timex *tx); - int (*timer_create) (struct k_itimer *timer); - int (*nsleep) (const clockid_t which_clock, int flags, - struct timespec64 *, struct timespec __user *); - long (*nsleep_restart) (struct restart_block *restart_block); - int (*timer_set) (struct k_itimer *timr, int flags, - struct itimerspec64 *new_setting, - struct itimerspec64 *old_setting); - int (*timer_del) (struct k_itimer *timr); -#define TIMER_RETRY 1 - void (*timer_get) (struct k_itimer *timr, - struct itimerspec64 *cur_setting); -}; - -extern const struct k_clock clock_posix_cpu; -extern const struct k_clock clock_posix_dynamic; -extern const struct k_clock clock_process; -extern const struct k_clock clock_thread; -extern const struct k_clock alarm_clock; - -/* function to call to trigger timer event */ -int posix_timer_event(struct k_itimer *timr, int si_private); - -void posix_cpu_timer_schedule(struct k_itimer *timer); - void run_posix_cpu_timers(struct task_struct *task); void posix_cpu_timers_exit(struct task_struct *task); void posix_cpu_timers_exit_group(struct task_struct *task); diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 2a8675f9aac5..36855d675da5 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -28,6 +28,8 @@ #include #include +#include "posix-timers.h" + #define CREATE_TRACE_POINTS #include diff --git a/kernel/time/posix-clock.c b/kernel/time/posix-clock.c index bd4fb785652f..17cdc554c9fe 100644 --- a/kernel/time/posix-clock.c +++ b/kernel/time/posix-clock.c @@ -25,6 +25,8 @@ #include #include +#include "posix-timers.h" + static void delete_clock(struct kref *kref); /* diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index c99434739fd5..a77a792f2570 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -13,6 +13,8 @@ #include #include +#include "posix-timers.h" + /* * Called after updating RLIMIT_CPU to run cpu timer and update * tsk->signal->cputime_expires expiration cache if necessary. Needs diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index b60b655dfbcd..dee6a0d911d4 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -51,6 +51,7 @@ #include #include "timekeeping.h" +#include "posix-timers.h" /* * Management arrays for POSIX timers. Timers are now kept in static hash table diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h new file mode 100644 index 000000000000..ad2dbd29b389 --- /dev/null +++ b/kernel/time/posix-timers.h @@ -0,0 +1,29 @@ +#define TIMER_RETRY 1 + +struct k_clock { + int (*clock_getres) (const clockid_t which_clock, struct timespec64 *tp); + int (*clock_set) (const clockid_t which_clock, + const struct timespec64 *tp); + int (*clock_get) (const clockid_t which_clock, struct timespec64 *tp); + int (*clock_adj) (const clockid_t which_clock, struct timex *tx); + int (*timer_create) (struct k_itimer *timer); + int (*nsleep) (const clockid_t which_clock, int flags, + struct timespec64 *, struct timespec __user *); + long (*nsleep_restart) (struct restart_block *restart_block); + int (*timer_set) (struct k_itimer *timr, int flags, + struct itimerspec64 *new_setting, + struct itimerspec64 *old_setting); + int (*timer_del) (struct k_itimer *timr); + void (*timer_get) (struct k_itimer *timr, + struct itimerspec64 *cur_setting); +}; + +extern const struct k_clock clock_posix_cpu; +extern const struct k_clock clock_posix_dynamic; +extern const struct k_clock clock_process; +extern const struct k_clock clock_thread; +extern const struct k_clock alarm_clock; + +int posix_timer_event(struct k_itimer *timr, int si_private); + +void posix_cpu_timer_schedule(struct k_itimer *timer); -- cgit v1.2.3-58-ga151 From af888d677a3f4473c198b4720319dd037f398b51 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:42 +0200 Subject: posix-timers: Unify overrun/requeue_pending handling hrtimer based posix-timers and posix-cpu-timers handle the update of the rearming and overflow related status fields differently. Move that update to the common rearming code. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.484936964@linutronix.de --- kernel/time/posix-cpu-timers.c | 18 +++++++----------- kernel/time/posix-timers.c | 15 ++++++++------- 2 files changed, 15 insertions(+), 18 deletions(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index a77a792f2570..1683e503179e 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -527,6 +527,7 @@ static void cpu_timer_fire(struct k_itimer *timer) * ticking in case the signal is deliverable next time. */ posix_cpu_timer_schedule(timer); + ++timer->it_requeue_pending; } } @@ -997,12 +998,12 @@ void posix_cpu_timer_schedule(struct k_itimer *timer) cpu_clock_sample(timer->it_clock, p, &now); bump_cpu_timer(timer, now); if (unlikely(p->exit_state)) - goto out; + return; /* Protect timer list r/w in arm_timer() */ sighand = lock_task_sighand(p, &flags); if (!sighand) - goto out; + return; } else { /* * Protect arm_timer() and timer sampling in case of call to @@ -1015,11 +1016,10 @@ void posix_cpu_timer_schedule(struct k_itimer *timer) * We can't even collect a sample any more. */ timer->it.cpu.expires = 0; - goto out; + return; } else if (unlikely(p->exit_state) && thread_group_empty(p)) { - unlock_task_sighand(p, &flags); - /* Optimizations: if the process is dying, no need to rearm */ - goto out; + /* If the process is dying, no need to rearm */ + goto unlock; } cpu_timer_sample_group(timer->it_clock, p, &now); bump_cpu_timer(timer, now); @@ -1031,12 +1031,8 @@ void posix_cpu_timer_schedule(struct k_itimer *timer) */ WARN_ON_ONCE(!irqs_disabled()); arm_timer(timer); +unlock: unlock_task_sighand(p, &flags); - -out: - timer->it_overrun_last = timer->it_overrun; - timer->it_overrun = -1; - ++timer->it_requeue_pending; } /** diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index dee6a0d911d4..79a00e0f1ef9 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -291,10 +291,6 @@ static void schedule_next_timer(struct k_itimer *timr) timr->it_overrun += (unsigned int) hrtimer_forward(timer, timer->base->get_time(), timr->it.real.interval); - - timr->it_overrun_last = timr->it_overrun; - timr->it_overrun = -1; - ++timr->it_requeue_pending; hrtimer_restart(timer); } @@ -315,18 +311,23 @@ void do_schedule_next_timer(struct siginfo *info) unsigned long flags; timr = lock_timer(info->si_tid, &flags); + if (!timr) + return; - if (timr && timr->it_requeue_pending == info->si_sys_private) { + if (timr->it_requeue_pending == info->si_sys_private) { if (timr->it_clock < 0) posix_cpu_timer_schedule(timr); else schedule_next_timer(timr); + timr->it_overrun_last = timr->it_overrun; + timr->it_overrun = -1; + ++timr->it_requeue_pending; + info->si_overrun += timr->it_overrun_last; } - if (timr) - unlock_timer(timr, flags); + unlock_timer(timr, flags); } int posix_timer_event(struct k_itimer *timr, int si_private) -- cgit v1.2.3-58-ga151 From 80105cd0e62ba8a2caf8eebd52f42952c7c04046 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:43 +0200 Subject: posix-timers: Move interval out of the union Preparatory patch to unify the alarm timer and hrtimer based posix interval timer handling. The interval is used as a criteria for rearming decisions so moving it out of the clock specific data structures allows later unification. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.563922908@linutronix.de --- include/linux/posix-timers.h | 4 ++-- kernel/time/alarmtimer.c | 13 ++++++------- kernel/time/posix-timers.c | 20 ++++++++++---------- 3 files changed, 18 insertions(+), 19 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index a372e7e3a396..908048f488ae 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -63,6 +63,7 @@ struct cpu_timer_list { * @it_requeue_pending: Indicator that timer waits for being requeued on * signal delivery * @it_sigev_notify: The notify word of sigevent struct for signal delivery + * @it_interval: The interval for periodic timers * @it_signal: Pointer to the creators signal struct * @it_pid: The pid of the process/task targeted by the signal * @it_process: The task to wakeup on clock_nanosleep (CPU timers) @@ -80,6 +81,7 @@ struct k_itimer { int it_overrun_last; int it_requeue_pending; int it_sigev_notify; + ktime_t it_interval; struct signal_struct *it_signal; union { struct pid *it_pid; @@ -89,12 +91,10 @@ struct k_itimer { union { struct { struct hrtimer timer; - ktime_t interval; } real; struct cpu_timer_list cpu; struct { struct alarm alarmtimer; - ktime_t interval; } alarm; struct rcu_head rcu; } it; diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 36855d675da5..5b8cf4b61854 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -527,9 +527,8 @@ static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm, } /* Re-add periodic timers */ - if (ptr->it.alarm.interval) { - ptr->it_overrun += alarm_forward(alarm, now, - ptr->it.alarm.interval); + if (ptr->it_interval) { + ptr->it_overrun += alarm_forward(alarm, now, ptr->it_interval); result = ALARMTIMER_RESTART; } spin_unlock_irqrestore(&ptr->it_lock, flags); @@ -613,7 +612,7 @@ static void alarm_timer_get(struct k_itimer *timr, cur_setting->it_value.tv_nsec = 0; } - cur_setting->it_interval = ktime_to_timespec64(timr->it.alarm.interval); + cur_setting->it_interval = ktime_to_timespec64(timr->it_interval); } /** @@ -662,14 +661,14 @@ static int alarm_timer_set(struct k_itimer *timr, int flags, return TIMER_RETRY; /* start the timer */ - timr->it.alarm.interval = timespec64_to_ktime(new_setting->it_interval); + timr->it_interval = timespec64_to_ktime(new_setting->it_interval); /* * Rate limit to the tick as a hot fix to prevent DOS. Will be * mopped up later. */ - if (timr->it.alarm.interval < TICK_NSEC) - timr->it.alarm.interval = TICK_NSEC; + if (timr->it_interval < TICK_NSEC) + timr->it_interval = TICK_NSEC; exp = timespec64_to_ktime(new_setting->it_value); /* Convert (if necessary) to absolute time */ diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 79a00e0f1ef9..7dd992cc7105 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -285,12 +285,12 @@ static void schedule_next_timer(struct k_itimer *timr) { struct hrtimer *timer = &timr->it.real.timer; - if (timr->it.real.interval == 0) + if (!timr->it_interval) return; timr->it_overrun += (unsigned int) hrtimer_forward(timer, timer->base->get_time(), - timr->it.real.interval); + timr->it_interval); hrtimer_restart(timer); } @@ -375,7 +375,7 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer) timr = container_of(timer, struct k_itimer, it.real.timer); spin_lock_irqsave(&timr->it_lock, flags); - if (timr->it.real.interval != 0) + if (timr->it_interval != 0) si_private = ++timr->it_requeue_pending; if (posix_timer_event(timr, si_private)) { @@ -384,7 +384,7 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer) * we will not get a call back to restart it AND * it should be restarted. */ - if (timr->it.real.interval != 0) { + if (timr->it_interval != 0) { ktime_t now = hrtimer_cb_get_time(timer); /* @@ -413,13 +413,13 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer) { ktime_t kj = NSEC_PER_SEC / HZ; - if (timr->it.real.interval < kj) + if (timr->it_interval < kj) now = ktime_add(now, kj); } #endif timr->it_overrun += (unsigned int) hrtimer_forward(timer, now, - timr->it.real.interval); + timr->it_interval); ret = HRTIMER_RESTART; ++timr->it_requeue_pending; } @@ -631,7 +631,7 @@ common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) memset(cur_setting, 0, sizeof(*cur_setting)); - iv = timr->it.real.interval; + iv = timr->it_interval; /* interval timer ? */ if (iv) @@ -732,7 +732,7 @@ common_timer_set(struct k_itimer *timr, int flags, common_timer_get(timr, old_setting); /* disable the timer */ - timr->it.real.interval = 0; + timr->it_interval = 0; /* * careful here. If smp we could be in the "fire" routine which will * be spinning as we hold the lock. But this is ONLY an SMP issue. @@ -755,7 +755,7 @@ common_timer_set(struct k_itimer *timr, int flags, hrtimer_set_expires(timer, timespec64_to_ktime(new_setting->it_value)); /* Convert interval */ - timr->it.real.interval = timespec64_to_ktime(new_setting->it_interval); + timr->it_interval = timespec64_to_ktime(new_setting->it_interval); /* SIGEV_NONE timers are not queued ! See common_timer_get */ if (((timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE)) { @@ -820,7 +820,7 @@ retry: static int common_timer_del(struct k_itimer *timer) { - timer->it.real.interval = 0; + timer->it_interval = 0; if (hrtimer_try_to_cancel(&timer->it.real.timer) < 0) return TIMER_RETRY; -- cgit v1.2.3-58-ga151 From d97bb75ddd2f38068df01da8abf26df78756253c Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:44 +0200 Subject: posix-timers: Store k_clock pointer in k_itimer Having the k_clock pointer in the k_itimer struct avoids the lookup in several code pathes and makes the next steps of unification of the hrtimer and alarmtimer based posix timers simpler. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.641222072@linutronix.de --- include/linux/posix-timers.h | 2 ++ kernel/time/posix-cpu-timers.c | 2 ++ kernel/time/posix-timers.c | 7 ++++--- 3 files changed, 8 insertions(+), 3 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 908048f488ae..8f9cca390cdb 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -56,6 +56,7 @@ struct cpu_timer_list { * @list: List head for binding the timer to signals->posix_timers * @t_hash: Entry in the posix timer hash table * @it_lock: Lock protecting the timer + * @kclock: Pointer to the k_clock struct handling this timer * @it_clock: The posix timer clock id * @it_id: The posix timer id for identifying the timer * @it_overrun: The overrun counter for pending signals @@ -75,6 +76,7 @@ struct k_itimer { struct list_head list; struct hlist_node t_hash; spinlock_t it_lock; + const struct k_clock *kclock; clockid_t it_clock; timer_t it_id; int it_overrun; diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 1683e503179e..0123ece6851b 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -324,6 +324,8 @@ static int posix_cpu_timer_create(struct k_itimer *new_timer) if (CPUCLOCK_WHICH(new_timer->it_clock) >= CPUCLOCK_MAX) return -EINVAL; + new_timer->kclock = &clock_posix_cpu; + INIT_LIST_HEAD(&new_timer->it.cpu.entry); rcu_read_lock(); diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 7dd992cc7105..eb007e19811d 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -519,6 +519,7 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock, it_id_set = IT_ID_SET; new_timer->it_id = (timer_t) new_timer_id; new_timer->it_clock = which_clock; + new_timer->kclock = kc; new_timer->it_overrun = -1; if (timer_event_spec) { @@ -679,7 +680,7 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, if (!timr) return -EINVAL; - kc = clockid_to_kclock(timr->it_clock); + kc = timr->kclock; if (WARN_ON_ONCE(!kc || !kc->timer_get)) ret = -EINVAL; else @@ -798,7 +799,7 @@ retry: if (!timr) return -EINVAL; - kc = clockid_to_kclock(timr->it_clock); + kc = timr->kclock; if (WARN_ON_ONCE(!kc || !kc->timer_set)) error = -EINVAL; else @@ -829,7 +830,7 @@ static int common_timer_del(struct k_itimer *timer) static inline int timer_delete_hook(struct k_itimer *timer) { - const struct k_clock *kc = clockid_to_kclock(timer->it_clock); + const struct k_clock *kc = timer->kclock; if (WARN_ON_ONCE(!kc || !kc->timer_del)) return -EINVAL; -- cgit v1.2.3-58-ga151 From 30802945893bc944b5971b408b37511a03b54e5c Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:45 +0200 Subject: posix-timers: Add timer_rearm() callback Add a timer_rearm() callback which is used to make the rescheduling of posix interval timers independent of the underlying clock implementation. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.732632167@linutronix.de --- kernel/time/posix-timers.h | 33 ++++++++++++++++++--------------- 1 file changed, 18 insertions(+), 15 deletions(-) diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h index ad2dbd29b389..02ffd1b9d230 100644 --- a/kernel/time/posix-timers.h +++ b/kernel/time/posix-timers.h @@ -1,21 +1,24 @@ #define TIMER_RETRY 1 struct k_clock { - int (*clock_getres) (const clockid_t which_clock, struct timespec64 *tp); - int (*clock_set) (const clockid_t which_clock, - const struct timespec64 *tp); - int (*clock_get) (const clockid_t which_clock, struct timespec64 *tp); - int (*clock_adj) (const clockid_t which_clock, struct timex *tx); - int (*timer_create) (struct k_itimer *timer); - int (*nsleep) (const clockid_t which_clock, int flags, - struct timespec64 *, struct timespec __user *); - long (*nsleep_restart) (struct restart_block *restart_block); - int (*timer_set) (struct k_itimer *timr, int flags, - struct itimerspec64 *new_setting, - struct itimerspec64 *old_setting); - int (*timer_del) (struct k_itimer *timr); - void (*timer_get) (struct k_itimer *timr, - struct itimerspec64 *cur_setting); + int (*clock_getres)(const clockid_t which_clock, + struct timespec64 *tp); + int (*clock_set)(const clockid_t which_clock, + const struct timespec64 *tp); + int (*clock_get)(const clockid_t which_clock, + struct timespec64 *tp); + int (*clock_adj)(const clockid_t which_clock, struct timex *tx); + int (*timer_create)(struct k_itimer *timer); + int (*nsleep)(const clockid_t which_clock, int flags, + struct timespec64 *, struct timespec __user *); + long (*nsleep_restart)(struct restart_block *restart_block); + int (*timer_set)(struct k_itimer *timr, int flags, + struct itimerspec64 *new_setting, + struct itimerspec64 *old_setting); + int (*timer_del)(struct k_itimer *timr); + void (*timer_get)(struct k_itimer *timr, + struct itimerspec64 *cur_setting); + void (*timer_rearm)(struct k_itimer *timr); }; extern const struct k_clock clock_posix_cpu; -- cgit v1.2.3-58-ga151 From 96fe3b072f134e4993f829d599eaa1e0eb5a10e5 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:46 +0200 Subject: posix-timers: Rename do_schedule_next_timer That function is a misnomer. Rename it with a proper prefix to posixtimer_rearm(). Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.811362578@linutronix.de --- include/linux/posix-timers.h | 2 +- kernel/signal.c | 2 +- kernel/time/posix-cpu-timers.c | 2 +- kernel/time/posix-timers.c | 10 +++++----- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 8f9cca390cdb..771e5f788c90 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -112,6 +112,6 @@ long clock_nanosleep_restart(struct restart_block *restart_block); void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new); -void do_schedule_next_timer(struct siginfo *info); +void posixtimer_rearm(struct siginfo *info); #endif diff --git a/kernel/signal.c b/kernel/signal.c index 1f85c843be8e..d031cd24f8a9 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -630,7 +630,7 @@ int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info) * about to disable them again anyway. */ spin_unlock(&tsk->sighand->siglock); - do_schedule_next_timer(info); + posixtimer_rearm(info); spin_lock(&tsk->sighand->siglock); } #endif diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 0123ece6851b..1ba576d3151a 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -981,7 +981,7 @@ static void check_process_timers(struct task_struct *tsk, } /* - * This is called from the signal code (via do_schedule_next_timer) + * This is called from the signal code (via posixtimer_rearm) * when the last timer signal was delivered and we have to reload the timer. */ void posix_cpu_timer_schedule(struct k_itimer *timer) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index eb007e19811d..036b7e70c65c 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -305,7 +305,7 @@ static void schedule_next_timer(struct k_itimer *timr) * To protect against the timer going away while the interrupt is queued, * we require that the it_requeue_pending flag be set. */ -void do_schedule_next_timer(struct siginfo *info) +void posixtimer_rearm(struct siginfo *info) { struct k_itimer *timr; unsigned long flags; @@ -336,12 +336,12 @@ int posix_timer_event(struct k_itimer *timr, int si_private) int shared, ret = -1; /* * FIXME: if ->sigq is queued we can race with - * dequeue_signal()->do_schedule_next_timer(). + * dequeue_signal()->posixtimer_rearm(). * * If dequeue_signal() sees the "right" value of - * si_sys_private it calls do_schedule_next_timer(). + * si_sys_private it calls posixtimer_rearm(). * We re-queue ->sigq and drop ->it_lock(). - * do_schedule_next_timer() locks the timer + * posixtimer_rearm() locks the timer * and re-schedules it while ->sigq is pending. * Not really bad, but not that we want. */ @@ -701,7 +701,7 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, * accumulating overruns on the next timer. The overrun is frozen when * the signal is delivered, either at the notify time (if the info block * is not queued) or at the actual delivery time (as we are informed by - * the call back to do_schedule_next_timer(). So all we need to do is + * the call back to posixtimer_rearm(). So all we need to do is * to pick up the frozen overrun. */ SYSCALL_DEFINE1(timer_getoverrun, timer_t, timer_id) -- cgit v1.2.3-58-ga151 From f37fb0aa4f453c7c785bbcecc4991ac48c5c0e51 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:47 +0200 Subject: posix-timers: Use timer_rearm() callback in posixtimer_rearm() Use the new timer_rearm() callback to replace the conditional hardcoded calls into the hrtimer and cpu timer code. This allows later to bring the same logic to alarmtimers. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.889661919@linutronix.de --- kernel/time/posix-cpu-timers.c | 7 +++++-- kernel/time/posix-timers.c | 12 ++++++------ kernel/time/posix-timers.h | 2 -- 3 files changed, 11 insertions(+), 10 deletions(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 1ba576d3151a..96c833a61ade 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -15,6 +15,8 @@ #include "posix-timers.h" +static void posix_cpu_timer_rearm(struct k_itimer *timer); + /* * Called after updating RLIMIT_CPU to run cpu timer and update * tsk->signal->cputime_expires expiration cache if necessary. Needs @@ -528,7 +530,7 @@ static void cpu_timer_fire(struct k_itimer *timer) * reload the timer. But we need to keep it * ticking in case the signal is deliverable next time. */ - posix_cpu_timer_schedule(timer); + posix_cpu_timer_rearm(timer); ++timer->it_requeue_pending; } } @@ -984,7 +986,7 @@ static void check_process_timers(struct task_struct *tsk, * This is called from the signal code (via posixtimer_rearm) * when the last timer signal was delivered and we have to reload the timer. */ -void posix_cpu_timer_schedule(struct k_itimer *timer) +static void posix_cpu_timer_rearm(struct k_itimer *timer) { struct sighand_struct *sighand; unsigned long flags; @@ -1431,6 +1433,7 @@ const struct k_clock clock_posix_cpu = { .timer_set = posix_cpu_timer_set, .timer_del = posix_cpu_timer_del, .timer_get = posix_cpu_timer_get, + .timer_rearm = posix_cpu_timer_rearm, }; const struct k_clock clock_process = { diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 036b7e70c65c..b12582a4b122 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -278,10 +278,9 @@ static __init int init_posix_timers(void) NULL); return 0; } - __initcall(init_posix_timers); -static void schedule_next_timer(struct k_itimer *timr) +static void common_hrtimer_rearm(struct k_itimer *timr) { struct hrtimer *timer = &timr->it.real.timer; @@ -315,10 +314,7 @@ void posixtimer_rearm(struct siginfo *info) return; if (timr->it_requeue_pending == info->si_sys_private) { - if (timr->it_clock < 0) - posix_cpu_timer_schedule(timr); - else - schedule_next_timer(timr); + timr->kclock->timer_rearm(timr); timr->it_overrun_last = timr->it_overrun; timr->it_overrun = -1; @@ -1046,6 +1042,7 @@ static const struct k_clock clock_realtime = { .timer_set = common_timer_set, .timer_get = common_timer_get, .timer_del = common_timer_del, + .timer_rearm = common_hrtimer_rearm, }; static const struct k_clock clock_monotonic = { @@ -1057,6 +1054,7 @@ static const struct k_clock clock_monotonic = { .timer_set = common_timer_set, .timer_get = common_timer_get, .timer_del = common_timer_del, + .timer_rearm = common_hrtimer_rearm, }; static const struct k_clock clock_monotonic_raw = { @@ -1083,6 +1081,7 @@ static const struct k_clock clock_tai = { .timer_set = common_timer_set, .timer_get = common_timer_get, .timer_del = common_timer_del, + .timer_rearm = common_hrtimer_rearm, }; static const struct k_clock clock_boottime = { @@ -1094,6 +1093,7 @@ static const struct k_clock clock_boottime = { .timer_set = common_timer_set, .timer_get = common_timer_get, .timer_del = common_timer_del, + .timer_rearm = common_hrtimer_rearm, }; static const struct k_clock * const posix_clocks[] = { diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h index 02ffd1b9d230..1f6f6f9a6a37 100644 --- a/kernel/time/posix-timers.h +++ b/kernel/time/posix-timers.h @@ -28,5 +28,3 @@ extern const struct k_clock clock_thread; extern const struct k_clock alarm_clock; int posix_timer_event(struct k_itimer *timr, int si_private); - -void posix_cpu_timer_schedule(struct k_itimer *timer); -- cgit v1.2.3-58-ga151 From 21e55c1f83880a56360287c00f2b5cd5e5a4a912 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:48 +0200 Subject: posix-timers: Add active flag to k_itimer Keep track of the activation state of posix timers. This is a preparatory change for making common_timer_get() usable by both hrtimer and alarm timer implementations. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211656.967783982@linutronix.de --- include/linux/posix-timers.h | 2 ++ kernel/time/posix-timers.c | 8 +++++++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 771e5f788c90..667095dbcd37 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -59,6 +59,7 @@ struct cpu_timer_list { * @kclock: Pointer to the k_clock struct handling this timer * @it_clock: The posix timer clock id * @it_id: The posix timer id for identifying the timer + * @it_active: Marker that timer is active * @it_overrun: The overrun counter for pending signals * @it_overrun_last: The overrun at the time of the last delivered signal * @it_requeue_pending: Indicator that timer waits for being requeued on @@ -79,6 +80,7 @@ struct k_itimer { const struct k_clock *kclock; clockid_t it_clock; timer_t it_id; + int it_active; int it_overrun; int it_overrun_last; int it_requeue_pending; diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index b12582a4b122..795215bba73d 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -316,6 +316,7 @@ void posixtimer_rearm(struct siginfo *info) if (timr->it_requeue_pending == info->si_sys_private) { timr->kclock->timer_rearm(timr); + timr->it_active = 1; timr->it_overrun_last = timr->it_overrun; timr->it_overrun = -1; ++timr->it_requeue_pending; @@ -371,6 +372,7 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer) timr = container_of(timer, struct k_itimer, it.real.timer); spin_lock_irqsave(&timr->it_lock, flags); + timr->it_active = 0; if (timr->it_interval != 0) si_private = ++timr->it_requeue_pending; @@ -418,6 +420,7 @@ static enum hrtimer_restart posix_timer_fn(struct hrtimer *timer) timr->it_interval); ret = HRTIMER_RESTART; ++timr->it_requeue_pending; + timr->it_active = 1; } } @@ -737,7 +740,8 @@ common_timer_set(struct k_itimer *timr, int flags, if (hrtimer_try_to_cancel(timer) < 0) return TIMER_RETRY; - timr->it_requeue_pending = (timr->it_requeue_pending + 2) & + timr->it_active = 0; + timr->it_requeue_pending = (timr->it_requeue_pending + 2) & ~REQUEUE_PENDING; timr->it_overrun_last = 0; @@ -763,6 +767,7 @@ common_timer_set(struct k_itimer *timr, int flags, return 0; } + timr->it_active = 1; hrtimer_start_expires(timer, mode); return 0; } @@ -821,6 +826,7 @@ static int common_timer_del(struct k_itimer *timer) if (hrtimer_try_to_cancel(&timer->it.real.timer) < 0) return TIMER_RETRY; + timer->it_active = 0; return 0; } -- cgit v1.2.3-58-ga151 From 63841b2a6969501de183efafc14d20175e402804 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:49 +0200 Subject: posix-timers: Add forward/remaining callbacks Add two callbacks to kclock which allow using common_)timer_get() for both hrtimer and alarm timer based clocks. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.044915536@linutronix.de --- kernel/time/posix-timers.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h index 1f6f6f9a6a37..3bc5b74c342f 100644 --- a/kernel/time/posix-timers.h +++ b/kernel/time/posix-timers.h @@ -19,6 +19,8 @@ struct k_clock { void (*timer_get)(struct k_itimer *timr, struct itimerspec64 *cur_setting); void (*timer_rearm)(struct k_itimer *timr); + int (*timer_forward)(struct k_itimer *timr, ktime_t now); + ktime_t (*timer_remaining)(struct k_itimer *timr, ktime_t now); }; extern const struct k_clock clock_posix_cpu; -- cgit v1.2.3-58-ga151 From 91d57bae08689199c8acc77a8b3b41150cafab1c Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:50 +0200 Subject: posix-timers: Make use of forward/remaining callbacks Replace the hrtimer calls by calls to the new forward/remaining kclock callbacks and move the hrtimer specific implementation into the corresponding callback functions. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.121437232@linutronix.de --- kernel/time/posix-timers.c | 64 +++++++++++++++++++++++++++++++++++----------- 1 file changed, 49 insertions(+), 15 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 795215bba73d..48f6c37ae5df 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -607,6 +607,20 @@ static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags) return NULL; } +static ktime_t common_hrtimer_remaining(struct k_itimer *timr, ktime_t now) +{ + struct hrtimer *timer = &timr->it.real.timer; + + return __hrtimer_expires_remaining_adjusted(timer, now); +} + +static int common_hrtimer_forward(struct k_itimer *timr, ktime_t now) +{ + struct hrtimer *timer = &timr->it.real.timer; + + return (int)hrtimer_forward(timer, now, timr->it_interval); +} + /* * Get the time remaining on a POSIX.1b interval timer. This function * is ALWAYS called with spin_lock_irq on the timer, thus it must not @@ -626,42 +640,54 @@ static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags) static void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) { + const struct k_clock *kc = timr->kclock; ktime_t now, remaining, iv; - struct hrtimer *timer = &timr->it.real.timer; + struct timespec64 ts64; + bool sig_none; memset(cur_setting, 0, sizeof(*cur_setting)); + sig_none = (timr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE; iv = timr->it_interval; /* interval timer ? */ - if (iv) + if (iv) { cur_setting->it_interval = ktime_to_timespec64(iv); - else if (!hrtimer_active(timer) && - (timr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) - return; + } else if (!timr->it_active) { + /* + * SIGEV_NONE oneshot timers are never queued. Check them + * below. + */ + if (!sig_none) + return; + } - now = timer->base->get_time(); + /* + * The timespec64 based conversion is suboptimal, but it's not + * worth to implement yet another callback. + */ + kc->clock_get(timr->it_clock, &ts64); + now = timespec64_to_ktime(ts64); /* - * When a requeue is pending or this is a SIGEV_NONE - * timer move the expiry time forward by intervals, so - * expiry is > now. + * When a requeue is pending or this is a SIGEV_NONE timer move the + * expiry time forward by intervals, so expiry is > now. */ - if (iv && (timr->it_requeue_pending & REQUEUE_PENDING || - (timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE)) - timr->it_overrun += (unsigned int) hrtimer_forward(timer, now, iv); + if (iv && (timr->it_requeue_pending & REQUEUE_PENDING || sig_none)) + timr->it_overrun += kc->timer_forward(timr, now); - remaining = __hrtimer_expires_remaining_adjusted(timer, now); + remaining = kc->timer_remaining(timr, now); /* Return 0 only, when the timer is expired and not pending */ if (remaining <= 0) { /* * A single shot SIGEV_NONE timer must return 0, when * it is expired ! */ - if ((timr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) + if (!sig_none) cur_setting->it_value.tv_nsec = 1; - } else + } else { cur_setting->it_value = ktime_to_timespec64(remaining); + } } /* Get the time remaining on a POSIX.1b interval timer. */ @@ -1049,6 +1075,8 @@ static const struct k_clock clock_realtime = { .timer_get = common_timer_get, .timer_del = common_timer_del, .timer_rearm = common_hrtimer_rearm, + .timer_forward = common_hrtimer_forward, + .timer_remaining= common_hrtimer_remaining, }; static const struct k_clock clock_monotonic = { @@ -1061,6 +1089,8 @@ static const struct k_clock clock_monotonic = { .timer_get = common_timer_get, .timer_del = common_timer_del, .timer_rearm = common_hrtimer_rearm, + .timer_forward = common_hrtimer_forward, + .timer_remaining= common_hrtimer_remaining, }; static const struct k_clock clock_monotonic_raw = { @@ -1088,6 +1118,8 @@ static const struct k_clock clock_tai = { .timer_get = common_timer_get, .timer_del = common_timer_del, .timer_rearm = common_hrtimer_rearm, + .timer_forward = common_hrtimer_forward, + .timer_remaining= common_hrtimer_remaining, }; static const struct k_clock clock_boottime = { @@ -1100,6 +1132,8 @@ static const struct k_clock clock_boottime = { .timer_get = common_timer_get, .timer_del = common_timer_del, .timer_rearm = common_hrtimer_rearm, + .timer_forward = common_hrtimer_forward, + .timer_remaining= common_hrtimer_remaining, }; static const struct k_clock * const posix_clocks[] = { -- cgit v1.2.3-58-ga151 From eabdec04385376d560078992710104cc7be2ce1b Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:51 +0200 Subject: posix-timers: Zero settings value in common code Zero out the settings struct in the common code so the callbacks do not have to do it themself. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.200870713@linutronix.de --- kernel/time/posix-cpu-timers.c | 5 +---- kernel/time/posix-timers.c | 3 +-- 2 files changed, 2 insertions(+), 6 deletions(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 96c833a61ade..cb4a4eb44279 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -719,10 +719,8 @@ static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec64 *itp */ itp->it_interval = ns_to_timespec64(timer->it.cpu.incr); - if (timer->it.cpu.expires == 0) { /* Timer not armed at all. */ - itp->it_value.tv_sec = itp->it_value.tv_nsec = 0; + if (!timer->it.cpu.expires) return; - } /* * Sample the clock to take the difference with the expiry time. @@ -746,7 +744,6 @@ static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec64 *itp * Call the timer disarmed, nothing else to do. */ timer->it.cpu.expires = 0; - itp->it_value = ns_to_timespec64(timer->it.cpu.expires); return; } else { cpu_timer_sample_group(timer->it_clock, p, &now); diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 48f6c37ae5df..0332f7a60fd6 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -645,8 +645,6 @@ common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) struct timespec64 ts64; bool sig_none; - memset(cur_setting, 0, sizeof(*cur_setting)); - sig_none = (timr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE; iv = timr->it_interval; @@ -705,6 +703,7 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, if (!timr) return -EINVAL; + memset(&cur_setting64, 0, sizeof(cur_setting64)); kc = timr->kclock; if (WARN_ON_ONCE(!kc || !kc->timer_get)) ret = -EINVAL; -- cgit v1.2.3-58-ga151 From 525b8ed91671e29e187dfe02d408b11190ccf494 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:52 +0200 Subject: posix-timers: Add cancel/arm callbacks Add timer_try_to_cancel() and timer_arm() callbacks to kclock which allow to make common_timer_set() usable by both hrtimer and alarmtimer based clocks. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.278022962@linutronix.de --- kernel/time/posix-timers.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h index 3bc5b74c342f..b0ad77e18886 100644 --- a/kernel/time/posix-timers.h +++ b/kernel/time/posix-timers.h @@ -21,6 +21,9 @@ struct k_clock { void (*timer_rearm)(struct k_itimer *timr); int (*timer_forward)(struct k_itimer *timr, ktime_t now); ktime_t (*timer_remaining)(struct k_itimer *timr, ktime_t now); + int (*timer_try_to_cancel)(struct k_itimer *timr); + void (*timer_arm)(struct k_itimer *timr, ktime_t expires, + bool absolute, bool sigev_none); }; extern const struct k_clock clock_posix_cpu; -- cgit v1.2.3-58-ga151 From eae1c4ae275fe3e024454c012a548ee0d700f54c Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:53 +0200 Subject: posix-timers: Make use of cancel/arm callbacks Replace the hrtimer calls by calls to the new try_to_cancel()/arm() kclock callbacks and move the hrtimer specific implementation into the corresponding callback functions. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.355396667@linutronix.de --- kernel/time/posix-timers.c | 181 +++++++++++++++++++++++++-------------------- 1 file changed, 100 insertions(+), 81 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 0332f7a60fd6..8acc9ee2c2d6 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -744,25 +744,49 @@ SYSCALL_DEFINE1(timer_getoverrun, timer_t, timer_id) return overrun; } +static void common_hrtimer_arm(struct k_itimer *timr, ktime_t expires, + bool absolute, bool sigev_none) +{ + struct hrtimer *timer = &timr->it.real.timer; + enum hrtimer_mode mode; + + mode = absolute ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL; + hrtimer_init(&timr->it.real.timer, timr->it_clock, mode); + timr->it.real.timer.function = posix_timer_fn; + + if (!absolute) + expires = ktime_add_safe(expires, timer->base->get_time()); + hrtimer_set_expires(timer, expires); + + if (!sigev_none) + hrtimer_start_expires(timer, HRTIMER_MODE_ABS); +} + +static int common_hrtimer_try_to_cancel(struct k_itimer *timr) +{ + return hrtimer_try_to_cancel(&timr->it.real.timer); +} + /* Set a POSIX.1b interval timer. */ -/* timr->it_lock is taken. */ static int common_timer_set(struct k_itimer *timr, int flags, - struct itimerspec64 *new_setting, struct itimerspec64 *old_setting) + struct itimerspec64 *new_setting, + struct itimerspec64 *old_setting) { - struct hrtimer *timer = &timr->it.real.timer; - enum hrtimer_mode mode; + const struct k_clock *kc = timr->kclock; + bool sigev_none; + ktime_t expires; if (old_setting) common_timer_get(timr, old_setting); - /* disable the timer */ + /* Prevent rearming by clearing the interval */ timr->it_interval = 0; /* - * careful here. If smp we could be in the "fire" routine which will - * be spinning as we hold the lock. But this is ONLY an SMP issue. + * Careful here. On SMP systems the timer expiry function could be + * active and spinning on timr->it_lock. */ - if (hrtimer_try_to_cancel(timer) < 0) + if (kc->timer_try_to_cancel(timr) < 0) return TIMER_RETRY; timr->it_active = 0; @@ -770,30 +794,16 @@ common_timer_set(struct k_itimer *timr, int flags, ~REQUEUE_PENDING; timr->it_overrun_last = 0; - /* switch off the timer when it_value is zero */ + /* Switch off the timer when it_value is zero */ if (!new_setting->it_value.tv_sec && !new_setting->it_value.tv_nsec) return 0; - mode = flags & TIMER_ABSTIME ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL; - hrtimer_init(&timr->it.real.timer, timr->it_clock, mode); - timr->it.real.timer.function = posix_timer_fn; - - hrtimer_set_expires(timer, timespec64_to_ktime(new_setting->it_value)); - - /* Convert interval */ timr->it_interval = timespec64_to_ktime(new_setting->it_interval); + expires = timespec64_to_ktime(new_setting->it_value); + sigev_none = (timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE; - /* SIGEV_NONE timers are not queued ! See common_timer_get */ - if (((timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE)) { - /* Setup correct expiry time for relative timers */ - if (mode == HRTIMER_MODE_REL) { - hrtimer_add_expires(timer, timer->base->get_time()); - } - return 0; - } - - timr->it_active = 1; - hrtimer_start_expires(timer, mode); + kc->timer_arm(timr, expires, flags & TIMER_ABSTIME, sigev_none); + timr->it_active = !sigev_none; return 0; } @@ -847,9 +857,10 @@ retry: static int common_timer_del(struct k_itimer *timer) { - timer->it_interval = 0; + const struct k_clock *kc = timer->kclock; - if (hrtimer_try_to_cancel(&timer->it.real.timer) < 0) + timer->it_interval = 0; + if (kc->timer_try_to_cancel(timer) < 0) return TIMER_RETRY; timer->it_active = 0; return 0; @@ -1063,76 +1074,84 @@ long clock_nanosleep_restart(struct restart_block *restart_block) } static const struct k_clock clock_realtime = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_clock_realtime_get, - .clock_set = posix_clock_realtime_set, - .clock_adj = posix_clock_realtime_adj, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, - .timer_rearm = common_hrtimer_rearm, - .timer_forward = common_hrtimer_forward, - .timer_remaining= common_hrtimer_remaining, + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_clock_realtime_get, + .clock_set = posix_clock_realtime_set, + .clock_adj = posix_clock_realtime_adj, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, + .timer_rearm = common_hrtimer_rearm, + .timer_forward = common_hrtimer_forward, + .timer_remaining = common_hrtimer_remaining, + .timer_try_to_cancel = common_hrtimer_try_to_cancel, + .timer_arm = common_hrtimer_arm, }; static const struct k_clock clock_monotonic = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_ktime_get_ts, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, - .timer_rearm = common_hrtimer_rearm, - .timer_forward = common_hrtimer_forward, - .timer_remaining= common_hrtimer_remaining, + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_ktime_get_ts, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, + .timer_rearm = common_hrtimer_rearm, + .timer_forward = common_hrtimer_forward, + .timer_remaining = common_hrtimer_remaining, + .timer_try_to_cancel = common_hrtimer_try_to_cancel, + .timer_arm = common_hrtimer_arm, }; static const struct k_clock clock_monotonic_raw = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_get_monotonic_raw, + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_get_monotonic_raw, }; static const struct k_clock clock_realtime_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_realtime_coarse, + .clock_getres = posix_get_coarse_res, + .clock_get = posix_get_realtime_coarse, }; static const struct k_clock clock_monotonic_coarse = { - .clock_getres = posix_get_coarse_res, - .clock_get = posix_get_monotonic_coarse, + .clock_getres = posix_get_coarse_res, + .clock_get = posix_get_monotonic_coarse, }; static const struct k_clock clock_tai = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_get_tai, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, - .timer_rearm = common_hrtimer_rearm, - .timer_forward = common_hrtimer_forward, - .timer_remaining= common_hrtimer_remaining, + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_get_tai, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, + .timer_rearm = common_hrtimer_rearm, + .timer_forward = common_hrtimer_forward, + .timer_remaining = common_hrtimer_remaining, + .timer_try_to_cancel = common_hrtimer_try_to_cancel, + .timer_arm = common_hrtimer_arm, }; static const struct k_clock clock_boottime = { - .clock_getres = posix_get_hrtimer_res, - .clock_get = posix_get_boottime, - .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, - .timer_create = common_timer_create, - .timer_set = common_timer_set, - .timer_get = common_timer_get, - .timer_del = common_timer_del, - .timer_rearm = common_hrtimer_rearm, - .timer_forward = common_hrtimer_forward, - .timer_remaining= common_hrtimer_remaining, + .clock_getres = posix_get_hrtimer_res, + .clock_get = posix_get_boottime, + .nsleep = common_nsleep, + .nsleep_restart = hrtimer_nanosleep_restart, + .timer_create = common_timer_create, + .timer_set = common_timer_set, + .timer_get = common_timer_get, + .timer_del = common_timer_del, + .timer_rearm = common_hrtimer_rearm, + .timer_forward = common_hrtimer_forward, + .timer_remaining = common_hrtimer_remaining, + .timer_try_to_cancel = common_hrtimer_try_to_cancel, + .timer_arm = common_hrtimer_arm, }; static const struct k_clock * const posix_clocks[] = { -- cgit v1.2.3-58-ga151 From b3db80f77a95a45dbb2136f7b2a364dc797ea914 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:54 +0200 Subject: alarmtimer: Implement timer_rearm() callback Preparatory change to utilize the common posix timer mechanisms. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.434598989@linutronix.de --- kernel/time/alarmtimer.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 5b8cf4b61854..be85e3cbfe1b 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -536,6 +536,18 @@ static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm, return result; } +/** + * alarm_timer_rearm - Posix timer callback for rearming timer + * @timr: Pointer to the posixtimer data struct + */ +static void alarm_timer_rearm(struct k_itimer *timr) +{ + struct alarm *alarm = &timr->it.alarm.alarmtimer; + + timr->it_overrun += alarm_forward_now(alarm, timr->it_interval); + alarm_start(alarm, alarm->node.expires); +} + /** * alarm_clock_getres - posix getres interface * @which_clock: clockid @@ -594,7 +606,7 @@ static int alarm_timer_create(struct k_itimer *new_timer) /** * alarm_timer_get - posix timer_get interface - * @new_timer: k_itimer pointer + * @timr: k_itimer pointer * @cur_setting: itimerspec data to fill * * Copies out the current itimerspec data @@ -863,6 +875,7 @@ const struct k_clock alarm_clock = { .timer_set = alarm_timer_set, .timer_del = alarm_timer_del, .timer_get = alarm_timer_get, + .timer_rearm = alarm_timer_rearm, .nsleep = alarm_timer_nsleep, }; #endif /* CONFIG_POSIX_TIMERS */ -- cgit v1.2.3-58-ga151 From e7561f1633ac735df48c55ad09a2530e9ab9fab1 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:55 +0200 Subject: alarmtimer: Implement forward callback Preparatory change to utilize the common posix timer mechanisms. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.513694229@linutronix.de --- kernel/time/alarmtimer.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index be85e3cbfe1b..6082cf1af876 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -548,6 +548,18 @@ static void alarm_timer_rearm(struct k_itimer *timr) alarm_start(alarm, alarm->node.expires); } +/** + * alarm_timer_forward - Posix timer callback for forwarding timer + * @timr: Pointer to the posixtimer data struct + * @now: Current time to forward the timer against + */ +static int alarm_timer_forward(struct k_itimer *timr, ktime_t now) +{ + struct alarm *alarm = &timr->it.alarm.alarmtimer; + + return (int) alarm_forward(alarm, timr->it_interval, now); +} + /** * alarm_clock_getres - posix getres interface * @which_clock: clockid @@ -876,6 +888,7 @@ const struct k_clock alarm_clock = { .timer_del = alarm_timer_del, .timer_get = alarm_timer_get, .timer_rearm = alarm_timer_rearm, + .timer_forward = alarm_timer_forward, .nsleep = alarm_timer_nsleep, }; #endif /* CONFIG_POSIX_TIMERS */ -- cgit v1.2.3-58-ga151 From d653d8457c76da11f047af1f66256ac9b8421b69 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:56 +0200 Subject: alarmtimer: Implement remaining callback Preparatory change to utilize the common posix timer mechanisms. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.592676753@linutronix.de --- kernel/time/alarmtimer.c | 31 ++++++++++++++++++++++--------- 1 file changed, 22 insertions(+), 9 deletions(-) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 6082cf1af876..02ddc40f19fe 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -560,6 +560,18 @@ static int alarm_timer_forward(struct k_itimer *timr, ktime_t now) return (int) alarm_forward(alarm, timr->it_interval, now); } +/** + * alarm_timer_remaining - Posix timer callback to retrieve remaining time + * @timr: Pointer to the posixtimer data struct + * @now: Current time to calculate against + */ +static ktime_t alarm_timer_remaining(struct k_itimer *timr, ktime_t now) +{ + struct alarm *alarm = &timr->it.alarm.alarmtimer; + + return ktime_sub(now, alarm->node.expires); +} + /** * alarm_clock_getres - posix getres interface * @which_clock: clockid @@ -881,15 +893,16 @@ out: } const struct k_clock alarm_clock = { - .clock_getres = alarm_clock_getres, - .clock_get = alarm_clock_get, - .timer_create = alarm_timer_create, - .timer_set = alarm_timer_set, - .timer_del = alarm_timer_del, - .timer_get = alarm_timer_get, - .timer_rearm = alarm_timer_rearm, - .timer_forward = alarm_timer_forward, - .nsleep = alarm_timer_nsleep, + .clock_getres = alarm_clock_getres, + .clock_get = alarm_clock_get, + .timer_create = alarm_timer_create, + .timer_set = alarm_timer_set, + .timer_del = alarm_timer_del, + .timer_get = alarm_timer_get, + .timer_rearm = alarm_timer_rearm, + .timer_forward = alarm_timer_forward, + .timer_remaining = alarm_timer_remaining, + .nsleep = alarm_timer_nsleep, }; #endif /* CONFIG_POSIX_TIMERS */ -- cgit v1.2.3-58-ga151 From e344c9e76bc6af997926171bfd90d25bbae0a2c5 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:57 +0200 Subject: alarmtimer: Implement try_to_cancel callback Preparatory change to utilize the common posix timer mechanisms. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.670026824@linutronix.de --- kernel/time/alarmtimer.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 02ddc40f19fe..374bd855a488 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -572,6 +572,15 @@ static ktime_t alarm_timer_remaining(struct k_itimer *timr, ktime_t now) return ktime_sub(now, alarm->node.expires); } +/** + * alarm_timer_try_to_cancel - Posix timer callback to cancel a timer + * @timr: Pointer to the posixtimer data struct + */ +static int alarm_timer_try_to_cancel(struct k_itimer *timr) +{ + return alarm_try_to_cancel(&timr->it.alarm.alarmtimer); +} + /** * alarm_clock_getres - posix getres interface * @which_clock: clockid @@ -902,6 +911,7 @@ const struct k_clock alarm_clock = { .timer_rearm = alarm_timer_rearm, .timer_forward = alarm_timer_forward, .timer_remaining = alarm_timer_remaining, + .timer_try_to_cancel = alarm_timer_try_to_cancel, .nsleep = alarm_timer_nsleep, }; #endif /* CONFIG_POSIX_TIMERS */ -- cgit v1.2.3-58-ga151 From b3bf6f369d50ece9dec6338741648005d95c19e4 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:58 +0200 Subject: alarmtimer: Implement arm callback Preparatory change to utilize the common posix timer mechanisms. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.747567162@linutronix.de --- kernel/time/alarmtimer.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 374bd855a488..c618a44bb054 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -581,6 +581,27 @@ static int alarm_timer_try_to_cancel(struct k_itimer *timr) return alarm_try_to_cancel(&timr->it.alarm.alarmtimer); } +/** + * alarm_timer_arm - Posix timer callback to arm a timer + * @timr: Pointer to the posixtimer data struct + * @expires: The new expiry time + * @absolute: Expiry value is absolute time + * @sigev_none: Posix timer does not deliver signals + */ +static void alarm_timer_arm(struct k_itimer *timr, ktime_t expires, + bool absolute, bool sigev_none) +{ + struct alarm *alarm = &timr->it.alarm.alarmtimer; + struct alarm_base *base = &alarm_bases[alarm->type]; + + if (!absolute) + expires = ktime_add_safe(expires, base->gettime()); + if (sigev_none) + alarm->node.expires = expires; + else + alarm_start(&timr->it.alarm.alarmtimer, expires); +} + /** * alarm_clock_getres - posix getres interface * @which_clock: clockid @@ -908,6 +929,7 @@ const struct k_clock alarm_clock = { .timer_set = alarm_timer_set, .timer_del = alarm_timer_del, .timer_get = alarm_timer_get, + .timer_arm = alarm_timer_arm, .timer_rearm = alarm_timer_rearm, .timer_forward = alarm_timer_forward, .timer_remaining = alarm_timer_remaining, -- cgit v1.2.3-58-ga151 From f2c45807d3992fe0f173f34af9c347d907c31686 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 30 May 2017 23:15:59 +0200 Subject: alarmtimer: Switch over to generic set/get/rearm routine All required callbacks are in place. Switch the alarm timer based posix interval timer callbacks to the common implementation and remove the incorrect private implementation. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170530211657.825471962@linutronix.de --- kernel/time/alarmtimer.c | 121 +++++++-------------------------------------- kernel/time/posix-timers.c | 12 ++--- kernel/time/posix-timers.h | 6 +++ 3 files changed, 29 insertions(+), 110 deletions(-) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index c618a44bb054..d8a7a7e214de 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -515,20 +515,26 @@ static enum alarmtimer_type clock2alarm(clockid_t clockid) static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm, ktime_t now) { - unsigned long flags; struct k_itimer *ptr = container_of(alarm, struct k_itimer, - it.alarm.alarmtimer); + it.alarm.alarmtimer); enum alarmtimer_restart result = ALARMTIMER_NORESTART; + unsigned long flags; + int si_private = 0; spin_lock_irqsave(&ptr->it_lock, flags); - if ((ptr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) { - if (posix_timer_event(ptr, 0)) - ptr->it_overrun++; - } - /* Re-add periodic timers */ - if (ptr->it_interval) { - ptr->it_overrun += alarm_forward(alarm, now, ptr->it_interval); + ptr->it_active = 0; + if (ptr->it_interval) + si_private = ++ptr->it_requeue_pending; + + if (posix_timer_event(ptr, si_private) && ptr->it_interval) { + /* + * Handle ignored signals and rearm the timer. This will go + * away once we handle ignored signals proper. + */ + ptr->it_overrun += alarm_forward_now(alarm, ptr->it_interval); + ++ptr->it_requeue_pending; + ptr->it_active = 1; result = ALARMTIMER_RESTART; } spin_unlock_irqrestore(&ptr->it_lock, flags); @@ -658,97 +664,6 @@ static int alarm_timer_create(struct k_itimer *new_timer) return 0; } -/** - * alarm_timer_get - posix timer_get interface - * @timr: k_itimer pointer - * @cur_setting: itimerspec data to fill - * - * Copies out the current itimerspec data - */ -static void alarm_timer_get(struct k_itimer *timr, - struct itimerspec64 *cur_setting) -{ - ktime_t relative_expiry_time = - alarm_expires_remaining(&(timr->it.alarm.alarmtimer)); - - if (ktime_to_ns(relative_expiry_time) > 0) { - cur_setting->it_value = ktime_to_timespec64(relative_expiry_time); - } else { - cur_setting->it_value.tv_sec = 0; - cur_setting->it_value.tv_nsec = 0; - } - - cur_setting->it_interval = ktime_to_timespec64(timr->it_interval); -} - -/** - * alarm_timer_del - posix timer_del interface - * @timr: k_itimer pointer to be deleted - * - * Cancels any programmed alarms for the given timer. - */ -static int alarm_timer_del(struct k_itimer *timr) -{ - if (!rtcdev) - return -ENOTSUPP; - - if (alarm_try_to_cancel(&timr->it.alarm.alarmtimer) < 0) - return TIMER_RETRY; - - return 0; -} - -/** - * alarm_timer_set - posix timer_set interface - * @timr: k_itimer pointer to be deleted - * @flags: timer flags - * @new_setting: itimerspec to be used - * @old_setting: itimerspec being replaced - * - * Sets the timer to new_setting, and starts the timer. - */ -static int alarm_timer_set(struct k_itimer *timr, int flags, - struct itimerspec64 *new_setting, - struct itimerspec64 *old_setting) -{ - ktime_t exp; - - if (!rtcdev) - return -ENOTSUPP; - - if (flags & ~TIMER_ABSTIME) - return -EINVAL; - - if (old_setting) - alarm_timer_get(timr, old_setting); - - /* If the timer was already set, cancel it */ - if (alarm_try_to_cancel(&timr->it.alarm.alarmtimer) < 0) - return TIMER_RETRY; - - /* start the timer */ - timr->it_interval = timespec64_to_ktime(new_setting->it_interval); - - /* - * Rate limit to the tick as a hot fix to prevent DOS. Will be - * mopped up later. - */ - if (timr->it_interval < TICK_NSEC) - timr->it_interval = TICK_NSEC; - - exp = timespec64_to_ktime(new_setting->it_value); - /* Convert (if necessary) to absolute time */ - if (flags != TIMER_ABSTIME) { - ktime_t now; - - now = alarm_bases[timr->it.alarm.alarmtimer.type].gettime(); - exp = ktime_add_safe(now, exp); - } - - alarm_start(&timr->it.alarm.alarmtimer, exp); - return 0; -} - /** * alarmtimer_nsleep_wakeup - Wakeup function for alarm_timer_nsleep * @alarm: ptr to alarm that fired @@ -926,9 +841,9 @@ const struct k_clock alarm_clock = { .clock_getres = alarm_clock_getres, .clock_get = alarm_clock_get, .timer_create = alarm_timer_create, - .timer_set = alarm_timer_set, - .timer_del = alarm_timer_del, - .timer_get = alarm_timer_get, + .timer_set = common_timer_set, + .timer_del = common_timer_del, + .timer_get = common_timer_get, .timer_arm = alarm_timer_arm, .timer_rearm = alarm_timer_rearm, .timer_forward = alarm_timer_forward, diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 8acc9ee2c2d6..6e7a70b1bf37 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -637,8 +637,7 @@ static int common_hrtimer_forward(struct k_itimer *timr, ktime_t now) * it is the same as a requeue pending timer WRT to what we should * report. */ -static void -common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) +void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) { const struct k_clock *kc = timr->kclock; ktime_t now, remaining, iv; @@ -768,10 +767,9 @@ static int common_hrtimer_try_to_cancel(struct k_itimer *timr) } /* Set a POSIX.1b interval timer. */ -static int -common_timer_set(struct k_itimer *timr, int flags, - struct itimerspec64 *new_setting, - struct itimerspec64 *old_setting) +int common_timer_set(struct k_itimer *timr, int flags, + struct itimerspec64 *new_setting, + struct itimerspec64 *old_setting) { const struct k_clock *kc = timr->kclock; bool sigev_none; @@ -855,7 +853,7 @@ retry: return error; } -static int common_timer_del(struct k_itimer *timer) +int common_timer_del(struct k_itimer *timer) { const struct k_clock *kc = timer->kclock; diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h index b0ad77e18886..b086f5ba2f5b 100644 --- a/kernel/time/posix-timers.h +++ b/kernel/time/posix-timers.h @@ -33,3 +33,9 @@ extern const struct k_clock clock_thread; extern const struct k_clock alarm_clock; int posix_timer_event(struct k_itimer *timr, int si_private); + +void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting); +int common_timer_set(struct k_itimer *timr, int flags, + struct itimerspec64 *new_setting, + struct itimerspec64 *old_setting); +int common_timer_del(struct k_itimer *timer); -- cgit v1.2.3-58-ga151 From 164a1a90a4ae54911f02a1b4fc6ea7148edf07cb Mon Sep 17 00:00:00 2001 From: Andrew Jeffery Date: Mon, 5 Jun 2017 17:18:46 +0930 Subject: arm: aspeed: Add clock-names property to timer node The merging of a number of clocksource drivers into fttmr010 means we require clock-names to be specified in the Aspeed timer node, else the clocksource fails to probe and boot hangs. Signed-off-by: Andrew Jeffery Signed-off-by: Daniel Lezcano --- arch/arm/boot/dts/aspeed-g4.dtsi | 1 + arch/arm/boot/dts/aspeed-g5.dtsi | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/aspeed-g4.dtsi b/arch/arm/boot/dts/aspeed-g4.dtsi index 8c6bc29eb7f6..3e74929d3289 100644 --- a/arch/arm/boot/dts/aspeed-g4.dtsi +++ b/arch/arm/boot/dts/aspeed-g4.dtsi @@ -893,6 +893,7 @@ //interrupts = <16 17 18 35 36 37 38 39>; interrupts = <16>; clocks = <&clk_apb>; + clock-names = "PCLK"; }; wdt1: wdt@1e785000 { diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi index a0bea4a6ec77..1e6c701da853 100644 --- a/arch/arm/boot/dts/aspeed-g5.dtsi +++ b/arch/arm/boot/dts/aspeed-g5.dtsi @@ -1000,6 +1000,7 @@ //interrupts = <16 17 18 35 36 37 38 39>; interrupts = <16>; clocks = <&clk_apb>; + clock-names = "PCLK"; }; -- cgit v1.2.3-58-ga151 From 2a55e98f9f76825d78a4e6ef315c35fccabf5212 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 18 May 2017 22:16:58 +0200 Subject: clocksource/drivers/fttmr010: Fix the clock handling We need to also prepare and enable the clock we are using to get the right reference count and avoid it being shut off. Tested-by: Jonas Jensen Signed-off-by: Linus Walleij Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-fttmr010.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index b4a6f1e4bc54..58ce017e4a65 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -238,12 +238,18 @@ static int __init fttmr010_timer_of_init(struct device_node *np) * and using EXTCLK is not supported in the driver. */ struct clk *clk; + int ret; clk = of_clk_get_by_name(np, "PCLK"); if (IS_ERR(clk)) { - pr_err("could not get PCLK"); + pr_err("could not get PCLK\n"); return PTR_ERR(clk); } + ret = clk_prepare_enable(clk); + if (ret) { + pr_err("failed to enable PCLK\n"); + return ret; + } tick_rate = clk_get_rate(clk); return fttmr010_timer_common_init(np); -- cgit v1.2.3-58-ga151 From 454a65f43a33d48ea04ffaf635ef35abc3d27990 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 18 May 2017 22:16:59 +0200 Subject: clocksource/drivers/fttmr010: Merge FTTMR010 DT bindings This merges the Moxa and FTTMR010 device tree bindings into the Faraday binding document to avoid confusion. The FTTMR010 is the IP block used by these SoCs, in vanilla or modified variant. The Aspeed variant is modified such that it is no longer fully register-compatible with FTTMR010 so for this reason it is not listed with two compatible strings, instead just one. Cc: Joel Stanley Tested-by: Jonas Jensen Signed-off-by: Linus Walleij Acked-by: Rob Herring Acked-by: Joel Stanley Signed-off-by: Daniel Lezcano --- .../devicetree/bindings/timer/faraday,fttmr010.txt | 4 +++- .../devicetree/bindings/timer/moxa,moxart-timer.txt | 19 ------------------- 2 files changed, 3 insertions(+), 20 deletions(-) delete mode 100644 Documentation/devicetree/bindings/timer/moxa,moxart-timer.txt diff --git a/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt b/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt index b73ca6cd07f8..6e18bd662ccb 100644 --- a/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt +++ b/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt @@ -7,7 +7,9 @@ Required properties: - compatible : Must be one of "faraday,fttmr010" - "cortina,gemini-timer" + "cortina,gemini-timer", "faraday,fttmr010" + "moxa,moxart-timer", "faraday,fttmr010" + "aspeed,ast2400-timer" - reg : Should contain registers location and length - interrupts : Should contain the three timer interrupts usually with flags for falling edge diff --git a/Documentation/devicetree/bindings/timer/moxa,moxart-timer.txt b/Documentation/devicetree/bindings/timer/moxa,moxart-timer.txt deleted file mode 100644 index e207c11630af..000000000000 --- a/Documentation/devicetree/bindings/timer/moxa,moxart-timer.txt +++ /dev/null @@ -1,19 +0,0 @@ -MOXA ART timer - -Required properties: - -- compatible : Must be one of: - - "moxa,moxart-timer" - - "aspeed,ast2400-timer" -- reg : Should contain registers location and length -- interrupts : Should contain the timer interrupt number -- clocks : Should contain phandle for the clock that drives the counter - -Example: - - timer: timer@98400000 { - compatible = "moxa,moxart-timer"; - reg = <0x98400000 0x42>; - interrupts = <19 1>; - clocks = <&coreclk>; - }; -- cgit v1.2.3-58-ga151 From dd98442e17a66318b021d4342abf53069cc8bed1 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 18 May 2017 22:17:00 +0200 Subject: clocksource/drivers/fttmr010: Drop Gemini specifics The Gemini now has a proper clock driver and a proper PCLK assigned in its device tree. Drop the Gemini-specific hacks to look up the system speed and rely on the clock framework like everyone else. Cc: Joel Stanley Tested-by: Jonas Jensen Signed-off-by: Linus Walleij Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-fttmr010.c | 103 ++++++++--------------------------- 1 file changed, 22 insertions(+), 81 deletions(-) diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index 58ce017e4a65..db097db346e3 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -11,8 +11,6 @@ #include #include #include -#include -#include #include #include #include @@ -179,9 +177,28 @@ static struct irqaction fttmr010_timer_irq = { .handler = fttmr010_timer_interrupt, }; -static int __init fttmr010_timer_common_init(struct device_node *np) +static int __init fttmr010_timer_init(struct device_node *np) { int irq; + struct clk *clk; + int ret; + + /* + * These implementations require a clock reference. + * FIXME: we currently only support clocking using PCLK + * and using EXTCLK is not supported in the driver. + */ + clk = of_clk_get_by_name(np, "PCLK"); + if (IS_ERR(clk)) { + pr_err("could not get PCLK\n"); + return PTR_ERR(clk); + } + ret = clk_prepare_enable(clk); + if (ret) { + pr_err("failed to enable PCLK\n"); + return ret; + } + tick_rate = clk_get_rate(clk); base = of_iomap(np, 0); if (!base) { @@ -229,81 +246,5 @@ static int __init fttmr010_timer_common_init(struct device_node *np) return 0; } - -static int __init fttmr010_timer_of_init(struct device_node *np) -{ - /* - * These implementations require a clock reference. - * FIXME: we currently only support clocking using PCLK - * and using EXTCLK is not supported in the driver. - */ - struct clk *clk; - int ret; - - clk = of_clk_get_by_name(np, "PCLK"); - if (IS_ERR(clk)) { - pr_err("could not get PCLK\n"); - return PTR_ERR(clk); - } - ret = clk_prepare_enable(clk); - if (ret) { - pr_err("failed to enable PCLK\n"); - return ret; - } - tick_rate = clk_get_rate(clk); - - return fttmr010_timer_common_init(np); -} -CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_of_init); - -/* - * Gemini-specific: relevant registers in the global syscon - */ -#define GLOBAL_STATUS 0x04 -#define CPU_AHB_RATIO_MASK (0x3 << 18) -#define CPU_AHB_1_1 (0x0 << 18) -#define CPU_AHB_3_2 (0x1 << 18) -#define CPU_AHB_24_13 (0x2 << 18) -#define CPU_AHB_2_1 (0x3 << 18) -#define REG_TO_AHB_SPEED(reg) ((((reg) >> 15) & 0x7) * 10 + 130) - -static int __init gemini_timer_of_init(struct device_node *np) -{ - static struct regmap *map; - int ret; - u32 val; - - map = syscon_regmap_lookup_by_phandle(np, "syscon"); - if (IS_ERR(map)) { - pr_err("Can't get regmap for syscon handle\n"); - return -ENODEV; - } - ret = regmap_read(map, GLOBAL_STATUS, &val); - if (ret) { - pr_err("Can't read syscon status register\n"); - return -ENXIO; - } - - tick_rate = REG_TO_AHB_SPEED(val) * 1000000; - pr_info("Bus: %dMHz ", tick_rate / 1000000); - - tick_rate /= 6; /* APB bus run AHB*(1/6) */ - - switch (val & CPU_AHB_RATIO_MASK) { - case CPU_AHB_1_1: - pr_cont("(1/1)\n"); - break; - case CPU_AHB_3_2: - pr_cont("(3/2)\n"); - break; - case CPU_AHB_24_13: - pr_cont("(24/13)\n"); - break; - case CPU_AHB_2_1: - pr_cont("(2/1)\n"); - break; - } - - return fttmr010_timer_common_init(np); -} -CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", gemini_timer_of_init); +CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_init); +CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", fttmr010_timer_init); -- cgit v1.2.3-58-ga151 From e7bad212ca0e6b1dcca1e0316ca8658c738c1206 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 18 May 2017 22:17:01 +0200 Subject: clocksource/drivers/fttmr010: Use state container This converts the Faraday FTTMR010 to use the state container design pattern. Take some care to handle the state container and free:ing of resources as has been done in the Moxa driver. Cc: Joel Stanley Tested-by: Jonas Jensen Signed-off-by: Linus Walleij Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-fttmr010.c | 190 +++++++++++++++++++++-------------- 1 file changed, 116 insertions(+), 74 deletions(-) diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index db097db346e3..9ad31489bbef 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -15,6 +15,7 @@ #include #include #include +#include /* * Register definitions for the timers @@ -62,23 +63,35 @@ #define TIMER_3_INT_OVERFLOW (1 << 8) #define TIMER_INT_ALL_MASK 0x1ff -static unsigned int tick_rate; -static void __iomem *base; +struct fttmr010 { + void __iomem *base; + unsigned int tick_rate; + struct clock_event_device clkevt; +}; + +/* A local singleton used by sched_clock, which is stateless */ +static struct fttmr010 *local_fttmr; + +static inline struct fttmr010 *to_fttmr010(struct clock_event_device *evt) +{ + return container_of(evt, struct fttmr010, clkevt); +} static u64 notrace fttmr010_read_sched_clock(void) { - return readl(base + TIMER3_COUNT); + return readl(local_fttmr->base + TIMER3_COUNT); } static int fttmr010_timer_set_next_event(unsigned long cycles, struct clock_event_device *evt) { + struct fttmr010 *fttmr010 = to_fttmr010(evt); u32 cr; /* Setup the match register */ - cr = readl(base + TIMER1_COUNT); - writel(cr + cycles, base + TIMER1_MATCH1); - if (readl(base + TIMER1_COUNT) - cr > cycles) + cr = readl(fttmr010->base + TIMER1_COUNT); + writel(cr + cycles, fttmr010->base + TIMER1_MATCH1); + if (readl(fttmr010->base + TIMER1_COUNT) - cr > cycles) return -ETIME; return 0; @@ -86,99 +99,90 @@ static int fttmr010_timer_set_next_event(unsigned long cycles, static int fttmr010_timer_shutdown(struct clock_event_device *evt) { + struct fttmr010 *fttmr010 = to_fttmr010(evt); + u32 cr; + + /* Stop timer and interrupt. */ + cr = readl(fttmr010->base + TIMER_CR); + cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT); + writel(cr, fttmr010->base + TIMER_CR); + + return 0; +} + +static int fttmr010_timer_set_oneshot(struct clock_event_device *evt) +{ + struct fttmr010 *fttmr010 = to_fttmr010(evt); u32 cr; - /* - * Disable also for oneshot: the set_next() call will arm the timer - * instead. - */ /* Stop timer and interrupt. */ - cr = readl(base + TIMER_CR); + cr = readl(fttmr010->base + TIMER_CR); cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT); - writel(cr, base + TIMER_CR); + writel(cr, fttmr010->base + TIMER_CR); /* Setup counter start from 0 */ - writel(0, base + TIMER1_COUNT); - writel(0, base + TIMER1_LOAD); + writel(0, fttmr010->base + TIMER1_COUNT); + writel(0, fttmr010->base + TIMER1_LOAD); - /* enable interrupt */ - cr = readl(base + TIMER_INTR_MASK); + /* Enable interrupt */ + cr = readl(fttmr010->base + TIMER_INTR_MASK); cr &= ~(TIMER_1_INT_OVERFLOW | TIMER_1_INT_MATCH2); cr |= TIMER_1_INT_MATCH1; - writel(cr, base + TIMER_INTR_MASK); + writel(cr, fttmr010->base + TIMER_INTR_MASK); - /* start the timer */ - cr = readl(base + TIMER_CR); + /* Start the timer */ + cr = readl(fttmr010->base + TIMER_CR); cr |= TIMER_1_CR_ENABLE; - writel(cr, base + TIMER_CR); + writel(cr, fttmr010->base + TIMER_CR); return 0; } static int fttmr010_timer_set_periodic(struct clock_event_device *evt) { - u32 period = DIV_ROUND_CLOSEST(tick_rate, HZ); + struct fttmr010 *fttmr010 = to_fttmr010(evt); + u32 period = DIV_ROUND_CLOSEST(fttmr010->tick_rate, HZ); u32 cr; /* Stop timer and interrupt */ - cr = readl(base + TIMER_CR); + cr = readl(fttmr010->base + TIMER_CR); cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT); - writel(cr, base + TIMER_CR); + writel(cr, fttmr010->base + TIMER_CR); /* Setup timer to fire at 1/HT intervals. */ cr = 0xffffffff - (period - 1); - writel(cr, base + TIMER1_COUNT); - writel(cr, base + TIMER1_LOAD); + writel(cr, fttmr010->base + TIMER1_COUNT); + writel(cr, fttmr010->base + TIMER1_LOAD); /* enable interrupt on overflow */ - cr = readl(base + TIMER_INTR_MASK); + cr = readl(fttmr010->base + TIMER_INTR_MASK); cr &= ~(TIMER_1_INT_MATCH1 | TIMER_1_INT_MATCH2); cr |= TIMER_1_INT_OVERFLOW; - writel(cr, base + TIMER_INTR_MASK); + writel(cr, fttmr010->base + TIMER_INTR_MASK); /* Start the timer */ - cr = readl(base + TIMER_CR); + cr = readl(fttmr010->base + TIMER_CR); cr |= TIMER_1_CR_ENABLE; cr |= TIMER_1_CR_INT; - writel(cr, base + TIMER_CR); + writel(cr, fttmr010->base + TIMER_CR); return 0; } -/* Use TIMER1 as clock event */ -static struct clock_event_device fttmr010_clockevent = { - .name = "TIMER1", - /* Reasonably fast and accurate clock event */ - .rating = 300, - .shift = 32, - .features = CLOCK_EVT_FEAT_PERIODIC | - CLOCK_EVT_FEAT_ONESHOT, - .set_next_event = fttmr010_timer_set_next_event, - .set_state_shutdown = fttmr010_timer_shutdown, - .set_state_periodic = fttmr010_timer_set_periodic, - .set_state_oneshot = fttmr010_timer_shutdown, - .tick_resume = fttmr010_timer_shutdown, -}; - /* * IRQ handler for the timer */ static irqreturn_t fttmr010_timer_interrupt(int irq, void *dev_id) { - struct clock_event_device *evt = &fttmr010_clockevent; + struct clock_event_device *evt = dev_id; evt->event_handler(evt); return IRQ_HANDLED; } -static struct irqaction fttmr010_timer_irq = { - .name = "Faraday FTTMR010 Timer Tick", - .flags = IRQF_TIMER, - .handler = fttmr010_timer_interrupt, -}; - static int __init fttmr010_timer_init(struct device_node *np) { + struct fttmr010 *fttmr010; int irq; struct clk *clk; int ret; @@ -198,53 +202,91 @@ static int __init fttmr010_timer_init(struct device_node *np) pr_err("failed to enable PCLK\n"); return ret; } - tick_rate = clk_get_rate(clk); - base = of_iomap(np, 0); - if (!base) { + fttmr010 = kzalloc(sizeof(*fttmr010), GFP_KERNEL); + if (!fttmr010) { + ret = -ENOMEM; + goto out_disable_clock; + } + fttmr010->tick_rate = clk_get_rate(clk); + + fttmr010->base = of_iomap(np, 0); + if (!fttmr010->base) { pr_err("Can't remap registers"); - return -ENXIO; + ret = -ENXIO; + goto out_free; } /* IRQ for timer 1 */ irq = irq_of_parse_and_map(np, 0); if (irq <= 0) { pr_err("Can't parse IRQ"); - return -EINVAL; + ret = -EINVAL; + goto out_unmap; } /* * Reset the interrupt mask and status */ - writel(TIMER_INT_ALL_MASK, base + TIMER_INTR_MASK); - writel(0, base + TIMER_INTR_STATE); - writel(TIMER_DEFAULT_FLAGS, base + TIMER_CR); + writel(TIMER_INT_ALL_MASK, fttmr010->base + TIMER_INTR_MASK); + writel(0, fttmr010->base + TIMER_INTR_STATE); + writel(TIMER_DEFAULT_FLAGS, fttmr010->base + TIMER_CR); /* * Setup free-running clocksource timer (interrupts * disabled.) */ - writel(0, base + TIMER3_COUNT); - writel(0, base + TIMER3_LOAD); - writel(0, base + TIMER3_MATCH1); - writel(0, base + TIMER3_MATCH2); - clocksource_mmio_init(base + TIMER3_COUNT, - "fttmr010_clocksource", tick_rate, + local_fttmr = fttmr010; + writel(0, fttmr010->base + TIMER3_COUNT); + writel(0, fttmr010->base + TIMER3_LOAD); + writel(0, fttmr010->base + TIMER3_MATCH1); + writel(0, fttmr010->base + TIMER3_MATCH2); + clocksource_mmio_init(fttmr010->base + TIMER3_COUNT, + "FTTMR010-TIMER3", + fttmr010->tick_rate, 300, 32, clocksource_mmio_readl_up); - sched_clock_register(fttmr010_read_sched_clock, 32, tick_rate); + sched_clock_register(fttmr010_read_sched_clock, 32, + fttmr010->tick_rate); /* - * Setup clockevent timer (interrupt-driven.) + * Setup clockevent timer (interrupt-driven) on timer 1. */ - writel(0, base + TIMER1_COUNT); - writel(0, base + TIMER1_LOAD); - writel(0, base + TIMER1_MATCH1); - writel(0, base + TIMER1_MATCH2); - setup_irq(irq, &fttmr010_timer_irq); - fttmr010_clockevent.cpumask = cpumask_of(0); - clockevents_config_and_register(&fttmr010_clockevent, tick_rate, + writel(0, fttmr010->base + TIMER1_COUNT); + writel(0, fttmr010->base + TIMER1_LOAD); + writel(0, fttmr010->base + TIMER1_MATCH1); + writel(0, fttmr010->base + TIMER1_MATCH2); + ret = request_irq(irq, fttmr010_timer_interrupt, IRQF_TIMER, + "FTTMR010-TIMER1", &fttmr010->clkevt); + if (ret) { + pr_err("FTTMR010-TIMER1 no IRQ\n"); + goto out_unmap; + } + + fttmr010->clkevt.name = "FTTMR010-TIMER1"; + /* Reasonably fast and accurate clock event */ + fttmr010->clkevt.rating = 300; + fttmr010->clkevt.features = CLOCK_EVT_FEAT_PERIODIC | + CLOCK_EVT_FEAT_ONESHOT; + fttmr010->clkevt.set_next_event = fttmr010_timer_set_next_event; + fttmr010->clkevt.set_state_shutdown = fttmr010_timer_shutdown; + fttmr010->clkevt.set_state_periodic = fttmr010_timer_set_periodic; + fttmr010->clkevt.set_state_oneshot = fttmr010_timer_set_oneshot; + fttmr010->clkevt.tick_resume = fttmr010_timer_shutdown; + fttmr010->clkevt.cpumask = cpumask_of(0); + fttmr010->clkevt.irq = irq; + clockevents_config_and_register(&fttmr010->clkevt, + fttmr010->tick_rate, 1, 0xffffffff); return 0; + +out_unmap: + iounmap(fttmr010->base); +out_free: + kfree(fttmr010); +out_disable_clock: + clk_disable_unprepare(clk); + + return ret; } CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_init); CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", fttmr010_timer_init); -- cgit v1.2.3-58-ga151 From d0d76d575960b0bf0e1481cb3f578add9b26988c Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 18 May 2017 22:17:02 +0200 Subject: clocksource/drivers/fttmr010: Switch to use bitops This switches the drivers to use the bitops BIT() macro to define bits. Cc: Joel Stanley Tested-by: Jonas Jensen Signed-off-by: Linus Walleij Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-fttmr010.c | 43 ++++++++++++++++++------------------ 1 file changed, 22 insertions(+), 21 deletions(-) diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index 9ad31489bbef..9df14cf13808 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -16,6 +16,7 @@ #include #include #include +#include /* * Register definitions for the timers @@ -36,31 +37,31 @@ #define TIMER_INTR_STATE (0x34) #define TIMER_INTR_MASK (0x38) -#define TIMER_1_CR_ENABLE (1 << 0) -#define TIMER_1_CR_CLOCK (1 << 1) -#define TIMER_1_CR_INT (1 << 2) -#define TIMER_2_CR_ENABLE (1 << 3) -#define TIMER_2_CR_CLOCK (1 << 4) -#define TIMER_2_CR_INT (1 << 5) -#define TIMER_3_CR_ENABLE (1 << 6) -#define TIMER_3_CR_CLOCK (1 << 7) -#define TIMER_3_CR_INT (1 << 8) -#define TIMER_1_CR_UPDOWN (1 << 9) -#define TIMER_2_CR_UPDOWN (1 << 10) -#define TIMER_3_CR_UPDOWN (1 << 11) +#define TIMER_1_CR_ENABLE BIT(0) +#define TIMER_1_CR_CLOCK BIT(1) +#define TIMER_1_CR_INT BIT(2) +#define TIMER_2_CR_ENABLE BIT(3) +#define TIMER_2_CR_CLOCK BIT(4) +#define TIMER_2_CR_INT BIT(5) +#define TIMER_3_CR_ENABLE BIT(6) +#define TIMER_3_CR_CLOCK BIT(7) +#define TIMER_3_CR_INT BIT(8) +#define TIMER_1_CR_UPDOWN BIT(9) +#define TIMER_2_CR_UPDOWN BIT(10) +#define TIMER_3_CR_UPDOWN BIT(11) #define TIMER_DEFAULT_FLAGS (TIMER_1_CR_UPDOWN | \ TIMER_3_CR_ENABLE | \ TIMER_3_CR_UPDOWN) -#define TIMER_1_INT_MATCH1 (1 << 0) -#define TIMER_1_INT_MATCH2 (1 << 1) -#define TIMER_1_INT_OVERFLOW (1 << 2) -#define TIMER_2_INT_MATCH1 (1 << 3) -#define TIMER_2_INT_MATCH2 (1 << 4) -#define TIMER_2_INT_OVERFLOW (1 << 5) -#define TIMER_3_INT_MATCH1 (1 << 6) -#define TIMER_3_INT_MATCH2 (1 << 7) -#define TIMER_3_INT_OVERFLOW (1 << 8) +#define TIMER_1_INT_MATCH1 BIT(0) +#define TIMER_1_INT_MATCH2 BIT(1) +#define TIMER_1_INT_OVERFLOW BIT(2) +#define TIMER_2_INT_MATCH1 BIT(3) +#define TIMER_2_INT_MATCH2 BIT(4) +#define TIMER_2_INT_OVERFLOW BIT(5) +#define TIMER_3_INT_MATCH1 BIT(6) +#define TIMER_3_INT_MATCH2 BIT(7) +#define TIMER_3_INT_OVERFLOW BIT(8) #define TIMER_INT_ALL_MASK 0x1ff struct fttmr010 { -- cgit v1.2.3-58-ga151 From b589da8b26f4b5cc3c3a84183dee33a73871522b Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 18 May 2017 22:17:03 +0200 Subject: clocksource/drivers/fttmr010: Switch to use TIMER2 src This switches the clocksource to TIMER2 like the Moxart driver does. Mainly to make it more similar to the Moxart/Aspeed driver but also because it seems more neat to use the timers in order: use timer 1, then timer 2. Cc: Joel Stanley Tested-by: Jonas Jensen Signed-off-by: Linus Walleij Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-fttmr010.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index 9df14cf13808..2d915d1455ab 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -49,9 +49,6 @@ #define TIMER_1_CR_UPDOWN BIT(9) #define TIMER_2_CR_UPDOWN BIT(10) #define TIMER_3_CR_UPDOWN BIT(11) -#define TIMER_DEFAULT_FLAGS (TIMER_1_CR_UPDOWN | \ - TIMER_3_CR_ENABLE | \ - TIMER_3_CR_UPDOWN) #define TIMER_1_INT_MATCH1 BIT(0) #define TIMER_1_INT_MATCH2 BIT(1) @@ -80,7 +77,7 @@ static inline struct fttmr010 *to_fttmr010(struct clock_event_device *evt) static u64 notrace fttmr010_read_sched_clock(void) { - return readl(local_fttmr->base + TIMER3_COUNT); + return readl(local_fttmr->base + TIMER2_COUNT); } static int fttmr010_timer_set_next_event(unsigned long cycles, @@ -230,19 +227,21 @@ static int __init fttmr010_timer_init(struct device_node *np) */ writel(TIMER_INT_ALL_MASK, fttmr010->base + TIMER_INTR_MASK); writel(0, fttmr010->base + TIMER_INTR_STATE); - writel(TIMER_DEFAULT_FLAGS, fttmr010->base + TIMER_CR); + /* Enable timer 1 count up, timer 2 count up */ + writel((TIMER_1_CR_UPDOWN | TIMER_2_CR_ENABLE | TIMER_2_CR_UPDOWN), + fttmr010->base + TIMER_CR); /* * Setup free-running clocksource timer (interrupts * disabled.) */ local_fttmr = fttmr010; - writel(0, fttmr010->base + TIMER3_COUNT); - writel(0, fttmr010->base + TIMER3_LOAD); - writel(0, fttmr010->base + TIMER3_MATCH1); - writel(0, fttmr010->base + TIMER3_MATCH2); - clocksource_mmio_init(fttmr010->base + TIMER3_COUNT, - "FTTMR010-TIMER3", + writel(0, fttmr010->base + TIMER2_COUNT); + writel(0, fttmr010->base + TIMER2_LOAD); + writel(0, fttmr010->base + TIMER2_MATCH1); + writel(0, fttmr010->base + TIMER2_MATCH2); + clocksource_mmio_init(fttmr010->base + TIMER2_COUNT, + "FTTMR010-TIMER2", fttmr010->tick_rate, 300, 32, clocksource_mmio_readl_up); sched_clock_register(fttmr010_read_sched_clock, 32, -- cgit v1.2.3-58-ga151 From ec14ba1ec537d530208c3ba3b3738349d386850f Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 18 May 2017 22:17:04 +0200 Subject: clocksource/drivers/fttmr010: Merge Moxa into FTTMR010 This merges the Moxa Art timer driver into the Faraday FTTMR010 driver and replaces all Kconfig symbols to use the Faraday driver instead. We are now so similar that the drivers can be merged by just adding a few lines to the Faraday timer. Differences: - The Faraday driver explicitly sets the counter to count upwards for the clocksource, removing the need for the clocksource core to invert the value. - The Faraday driver also handles sched_clock() On the Aspeed, the counter can only count downwards, so support the timers in downward-counting mode as well, and flag the Aspeed to use this mode. This mode was tested on the Gemini so I have high hopes that it'll work fine on the Aspeed as well. After this we have one driver for all three SoCs and a generic Faraday FTTMR010 timer driver, which is nice. Cc: Joel Stanley Cc: Jonas Jensen Signed-off-by: Linus Walleij Reviewed-by: Joel Stanley Tested-by: Joel Stanley Signed-off-by: Daniel Lezcano --- arch/arm/mach-aspeed/Kconfig | 2 +- arch/arm/mach-moxart/Kconfig | 2 +- drivers/clocksource/Kconfig | 7 - drivers/clocksource/Makefile | 1 - drivers/clocksource/moxart_timer.c | 256 ----------------------------------- drivers/clocksource/timer-fttmr010.c | 143 ++++++++++++++----- 6 files changed, 108 insertions(+), 303 deletions(-) delete mode 100644 drivers/clocksource/moxart_timer.c diff --git a/arch/arm/mach-aspeed/Kconfig b/arch/arm/mach-aspeed/Kconfig index f3f8c5c658db..2d5570e6e186 100644 --- a/arch/arm/mach-aspeed/Kconfig +++ b/arch/arm/mach-aspeed/Kconfig @@ -4,7 +4,7 @@ menuconfig ARCH_ASPEED select SRAM select WATCHDOG select ASPEED_WATCHDOG - select MOXART_TIMER + select FTTMR010_TIMER select MFD_SYSCON select PINCTRL help diff --git a/arch/arm/mach-moxart/Kconfig b/arch/arm/mach-moxart/Kconfig index 70db2abf6163..a4a91f9a3301 100644 --- a/arch/arm/mach-moxart/Kconfig +++ b/arch/arm/mach-moxart/Kconfig @@ -4,7 +4,7 @@ menuconfig ARCH_MOXART select CPU_FA526 select ARM_DMA_MEM_BUFFERABLE select FARADAY_FTINTC010 - select MOXART_TIMER + select FTTMR010_TIMER select GPIOLIB select PHYLIB if NETDEVICES help diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 545d541ae20e..1b22ade4c8f1 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -188,13 +188,6 @@ config ATLAS7_TIMER help Enables support for the Atlas7 timer. -config MOXART_TIMER - bool "Moxart timer driver" if COMPILE_TEST - depends on GENERIC_CLOCKEVENTS - select CLKSRC_MMIO - help - Enables support for the Moxart timer. - config MXS_TIMER bool "Mxs timer driver" if COMPILE_TEST depends on GENERIC_CLOCKEVENTS diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index 2b5b56a6f00f..cf0c30b6ec1f 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -26,7 +26,6 @@ obj-$(CONFIG_ORION_TIMER) += time-orion.o obj-$(CONFIG_BCM2835_TIMER) += bcm2835_timer.o obj-$(CONFIG_CLPS711X_TIMER) += clps711x-timer.o obj-$(CONFIG_ATLAS7_TIMER) += timer-atlas7.o -obj-$(CONFIG_MOXART_TIMER) += moxart_timer.o obj-$(CONFIG_MXS_TIMER) += mxs_timer.o obj-$(CONFIG_CLKSRC_PXA) += pxa_timer.o obj-$(CONFIG_PRIMA2_TIMER) += timer-prima2.o diff --git a/drivers/clocksource/moxart_timer.c b/drivers/clocksource/moxart_timer.c deleted file mode 100644 index 7f3430654fbd..000000000000 --- a/drivers/clocksource/moxart_timer.c +++ /dev/null @@ -1,256 +0,0 @@ -/* - * MOXA ART SoCs timer handling. - * - * Copyright (C) 2013 Jonas Jensen - * - * Jonas Jensen - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define TIMER1_BASE 0x00 -#define TIMER2_BASE 0x10 -#define TIMER3_BASE 0x20 - -#define REG_COUNT 0x0 /* writable */ -#define REG_LOAD 0x4 -#define REG_MATCH1 0x8 -#define REG_MATCH2 0xC - -#define TIMER_CR 0x30 -#define TIMER_INTR_STATE 0x34 -#define TIMER_INTR_MASK 0x38 - -/* - * Moxart TIMER_CR flags: - * - * MOXART_CR_*_CLOCK 0: PCLK, 1: EXT1CLK - * MOXART_CR_*_INT overflow interrupt enable bit - */ -#define MOXART_CR_1_ENABLE BIT(0) -#define MOXART_CR_1_CLOCK BIT(1) -#define MOXART_CR_1_INT BIT(2) -#define MOXART_CR_2_ENABLE BIT(3) -#define MOXART_CR_2_CLOCK BIT(4) -#define MOXART_CR_2_INT BIT(5) -#define MOXART_CR_3_ENABLE BIT(6) -#define MOXART_CR_3_CLOCK BIT(7) -#define MOXART_CR_3_INT BIT(8) -#define MOXART_CR_COUNT_UP BIT(9) - -#define MOXART_TIMER1_ENABLE (MOXART_CR_2_ENABLE | MOXART_CR_1_ENABLE) -#define MOXART_TIMER1_DISABLE (MOXART_CR_2_ENABLE) - -/* - * The ASpeed variant of the IP block has a different layout - * for the control register - */ -#define ASPEED_CR_1_ENABLE BIT(0) -#define ASPEED_CR_1_CLOCK BIT(1) -#define ASPEED_CR_1_INT BIT(2) -#define ASPEED_CR_2_ENABLE BIT(4) -#define ASPEED_CR_2_CLOCK BIT(5) -#define ASPEED_CR_2_INT BIT(6) -#define ASPEED_CR_3_ENABLE BIT(8) -#define ASPEED_CR_3_CLOCK BIT(9) -#define ASPEED_CR_3_INT BIT(10) - -#define ASPEED_TIMER1_ENABLE (ASPEED_CR_2_ENABLE | ASPEED_CR_1_ENABLE) -#define ASPEED_TIMER1_DISABLE (ASPEED_CR_2_ENABLE) - -struct moxart_timer { - void __iomem *base; - unsigned int t1_disable_val; - unsigned int t1_enable_val; - unsigned int count_per_tick; - struct clock_event_device clkevt; -}; - -static inline struct moxart_timer *to_moxart(struct clock_event_device *evt) -{ - return container_of(evt, struct moxart_timer, clkevt); -} - -static inline void moxart_disable(struct clock_event_device *evt) -{ - struct moxart_timer *timer = to_moxart(evt); - - writel(timer->t1_disable_val, timer->base + TIMER_CR); -} - -static inline void moxart_enable(struct clock_event_device *evt) -{ - struct moxart_timer *timer = to_moxart(evt); - - writel(timer->t1_enable_val, timer->base + TIMER_CR); -} - -static int moxart_shutdown(struct clock_event_device *evt) -{ - moxart_disable(evt); - return 0; -} - -static int moxart_set_oneshot(struct clock_event_device *evt) -{ - moxart_disable(evt); - writel(~0, to_moxart(evt)->base + TIMER1_BASE + REG_LOAD); - return 0; -} - -static int moxart_set_periodic(struct clock_event_device *evt) -{ - struct moxart_timer *timer = to_moxart(evt); - - moxart_disable(evt); - writel(timer->count_per_tick, timer->base + TIMER1_BASE + REG_LOAD); - writel(0, timer->base + TIMER1_BASE + REG_MATCH1); - moxart_enable(evt); - return 0; -} - -static int moxart_clkevt_next_event(unsigned long cycles, - struct clock_event_device *evt) -{ - struct moxart_timer *timer = to_moxart(evt); - u32 u; - - moxart_disable(evt); - - u = readl(timer->base + TIMER1_BASE + REG_COUNT) - cycles; - writel(u, timer->base + TIMER1_BASE + REG_MATCH1); - - moxart_enable(evt); - - return 0; -} - -static irqreturn_t moxart_timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = dev_id; - evt->event_handler(evt); - return IRQ_HANDLED; -} - -static int __init moxart_timer_init(struct device_node *node) -{ - int ret, irq; - unsigned long pclk; - struct clk *clk; - struct moxart_timer *timer; - - timer = kzalloc(sizeof(*timer), GFP_KERNEL); - if (!timer) - return -ENOMEM; - - timer->base = of_iomap(node, 0); - if (!timer->base) { - pr_err("%s: of_iomap failed\n", node->full_name); - ret = -ENXIO; - goto out_free; - } - - irq = irq_of_parse_and_map(node, 0); - if (irq <= 0) { - pr_err("%s: irq_of_parse_and_map failed\n", node->full_name); - ret = -EINVAL; - goto out_unmap; - } - - clk = of_clk_get(node, 0); - if (IS_ERR(clk)) { - pr_err("%s: of_clk_get failed\n", node->full_name); - ret = PTR_ERR(clk); - goto out_unmap; - } - - pclk = clk_get_rate(clk); - - if (of_device_is_compatible(node, "moxa,moxart-timer")) { - timer->t1_enable_val = MOXART_TIMER1_ENABLE; - timer->t1_disable_val = MOXART_TIMER1_DISABLE; - } else if (of_device_is_compatible(node, "aspeed,ast2400-timer")) { - timer->t1_enable_val = ASPEED_TIMER1_ENABLE; - timer->t1_disable_val = ASPEED_TIMER1_DISABLE; - } else { - pr_err("%s: unknown platform\n", node->full_name); - ret = -EINVAL; - goto out_unmap; - } - - timer->count_per_tick = DIV_ROUND_CLOSEST(pclk, HZ); - - timer->clkevt.name = node->name; - timer->clkevt.rating = 200; - timer->clkevt.features = CLOCK_EVT_FEAT_PERIODIC | - CLOCK_EVT_FEAT_ONESHOT; - timer->clkevt.set_state_shutdown = moxart_shutdown; - timer->clkevt.set_state_periodic = moxart_set_periodic; - timer->clkevt.set_state_oneshot = moxart_set_oneshot; - timer->clkevt.tick_resume = moxart_set_oneshot; - timer->clkevt.set_next_event = moxart_clkevt_next_event; - timer->clkevt.cpumask = cpumask_of(0); - timer->clkevt.irq = irq; - - ret = clocksource_mmio_init(timer->base + TIMER2_BASE + REG_COUNT, - "moxart_timer", pclk, 200, 32, - clocksource_mmio_readl_down); - if (ret) { - pr_err("%s: clocksource_mmio_init failed\n", node->full_name); - goto out_unmap; - } - - ret = request_irq(irq, moxart_timer_interrupt, IRQF_TIMER, - node->name, &timer->clkevt); - if (ret) { - pr_err("%s: setup_irq failed\n", node->full_name); - goto out_unmap; - } - - /* Clear match registers */ - writel(0, timer->base + TIMER1_BASE + REG_MATCH1); - writel(0, timer->base + TIMER1_BASE + REG_MATCH2); - writel(0, timer->base + TIMER2_BASE + REG_MATCH1); - writel(0, timer->base + TIMER2_BASE + REG_MATCH2); - - /* - * Start timer 2 rolling as our main wall clock source, keep timer 1 - * disabled - */ - writel(0, timer->base + TIMER_CR); - writel(~0, timer->base + TIMER2_BASE + REG_LOAD); - writel(timer->t1_disable_val, timer->base + TIMER_CR); - - /* - * documentation is not publicly available: - * min_delta / max_delta obtained by trial-and-error, - * max_delta 0xfffffffe should be ok because count - * register size is u32 - */ - clockevents_config_and_register(&timer->clkevt, pclk, 0x4, 0xfffffffe); - - return 0; - -out_unmap: - iounmap(timer->base); -out_free: - kfree(timer); - return ret; -} -CLOCKSOURCE_OF_DECLARE(moxart, "moxa,moxart-timer", moxart_timer_init); -CLOCKSOURCE_OF_DECLARE(aspeed, "aspeed,ast2400-timer", moxart_timer_init); diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index 2d915d1455ab..f8801507a687 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -50,6 +50,20 @@ #define TIMER_2_CR_UPDOWN BIT(10) #define TIMER_3_CR_UPDOWN BIT(11) +/* + * The Aspeed AST2400 moves bits around in the control register + * and lacks bits for setting the timer to count upwards. + */ +#define TIMER_1_CR_ASPEED_ENABLE BIT(0) +#define TIMER_1_CR_ASPEED_CLOCK BIT(1) +#define TIMER_1_CR_ASPEED_INT BIT(2) +#define TIMER_2_CR_ASPEED_ENABLE BIT(4) +#define TIMER_2_CR_ASPEED_CLOCK BIT(5) +#define TIMER_2_CR_ASPEED_INT BIT(6) +#define TIMER_3_CR_ASPEED_ENABLE BIT(8) +#define TIMER_3_CR_ASPEED_CLOCK BIT(9) +#define TIMER_3_CR_ASPEED_INT BIT(10) + #define TIMER_1_INT_MATCH1 BIT(0) #define TIMER_1_INT_MATCH2 BIT(1) #define TIMER_1_INT_OVERFLOW BIT(2) @@ -64,6 +78,8 @@ struct fttmr010 { void __iomem *base; unsigned int tick_rate; + bool count_down; + u32 t1_enable_val; struct clock_event_device clkevt; }; @@ -77,6 +93,8 @@ static inline struct fttmr010 *to_fttmr010(struct clock_event_device *evt) static u64 notrace fttmr010_read_sched_clock(void) { + if (local_fttmr->count_down) + return ~readl(local_fttmr->base + TIMER2_COUNT); return readl(local_fttmr->base + TIMER2_COUNT); } @@ -86,11 +104,23 @@ static int fttmr010_timer_set_next_event(unsigned long cycles, struct fttmr010 *fttmr010 = to_fttmr010(evt); u32 cr; - /* Setup the match register */ + /* Stop */ + cr = readl(fttmr010->base + TIMER_CR); + cr &= ~fttmr010->t1_enable_val; + writel(cr, fttmr010->base + TIMER_CR); + + /* Setup the match register forward/backward in time */ cr = readl(fttmr010->base + TIMER1_COUNT); - writel(cr + cycles, fttmr010->base + TIMER1_MATCH1); - if (readl(fttmr010->base + TIMER1_COUNT) - cr > cycles) - return -ETIME; + if (fttmr010->count_down) + cr -= cycles; + else + cr += cycles; + writel(cr, fttmr010->base + TIMER1_MATCH1); + + /* Start */ + cr = readl(fttmr010->base + TIMER_CR); + cr |= fttmr010->t1_enable_val; + writel(cr, fttmr010->base + TIMER_CR); return 0; } @@ -100,9 +130,9 @@ static int fttmr010_timer_shutdown(struct clock_event_device *evt) struct fttmr010 *fttmr010 = to_fttmr010(evt); u32 cr; - /* Stop timer and interrupt. */ + /* Stop */ cr = readl(fttmr010->base + TIMER_CR); - cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT); + cr &= ~fttmr010->t1_enable_val; writel(cr, fttmr010->base + TIMER_CR); return 0; @@ -113,14 +143,17 @@ static int fttmr010_timer_set_oneshot(struct clock_event_device *evt) struct fttmr010 *fttmr010 = to_fttmr010(evt); u32 cr; - /* Stop timer and interrupt. */ + /* Stop */ cr = readl(fttmr010->base + TIMER_CR); - cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT); + cr &= ~fttmr010->t1_enable_val; writel(cr, fttmr010->base + TIMER_CR); - /* Setup counter start from 0 */ + /* Setup counter start from 0 or ~0 */ writel(0, fttmr010->base + TIMER1_COUNT); - writel(0, fttmr010->base + TIMER1_LOAD); + if (fttmr010->count_down) + writel(~0, fttmr010->base + TIMER1_LOAD); + else + writel(0, fttmr010->base + TIMER1_LOAD); /* Enable interrupt */ cr = readl(fttmr010->base + TIMER_INTR_MASK); @@ -128,11 +161,6 @@ static int fttmr010_timer_set_oneshot(struct clock_event_device *evt) cr |= TIMER_1_INT_MATCH1; writel(cr, fttmr010->base + TIMER_INTR_MASK); - /* Start the timer */ - cr = readl(fttmr010->base + TIMER_CR); - cr |= TIMER_1_CR_ENABLE; - writel(cr, fttmr010->base + TIMER_CR); - return 0; } @@ -142,26 +170,30 @@ static int fttmr010_timer_set_periodic(struct clock_event_device *evt) u32 period = DIV_ROUND_CLOSEST(fttmr010->tick_rate, HZ); u32 cr; - /* Stop timer and interrupt */ + /* Stop */ cr = readl(fttmr010->base + TIMER_CR); - cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT); + cr &= ~fttmr010->t1_enable_val; writel(cr, fttmr010->base + TIMER_CR); - /* Setup timer to fire at 1/HT intervals. */ - cr = 0xffffffff - (period - 1); - writel(cr, fttmr010->base + TIMER1_COUNT); - writel(cr, fttmr010->base + TIMER1_LOAD); - - /* enable interrupt on overflow */ - cr = readl(fttmr010->base + TIMER_INTR_MASK); - cr &= ~(TIMER_1_INT_MATCH1 | TIMER_1_INT_MATCH2); - cr |= TIMER_1_INT_OVERFLOW; - writel(cr, fttmr010->base + TIMER_INTR_MASK); + /* Setup timer to fire at 1/HZ intervals. */ + if (fttmr010->count_down) { + writel(period, fttmr010->base + TIMER1_LOAD); + writel(0, fttmr010->base + TIMER1_MATCH1); + } else { + cr = 0xffffffff - (period - 1); + writel(cr, fttmr010->base + TIMER1_COUNT); + writel(cr, fttmr010->base + TIMER1_LOAD); + + /* Enable interrupt on overflow */ + cr = readl(fttmr010->base + TIMER_INTR_MASK); + cr &= ~(TIMER_1_INT_MATCH1 | TIMER_1_INT_MATCH2); + cr |= TIMER_1_INT_OVERFLOW; + writel(cr, fttmr010->base + TIMER_INTR_MASK); + } /* Start the timer */ cr = readl(fttmr010->base + TIMER_CR); - cr |= TIMER_1_CR_ENABLE; - cr |= TIMER_1_CR_INT; + cr |= fttmr010->t1_enable_val; writel(cr, fttmr010->base + TIMER_CR); return 0; @@ -181,9 +213,11 @@ static irqreturn_t fttmr010_timer_interrupt(int irq, void *dev_id) static int __init fttmr010_timer_init(struct device_node *np) { struct fttmr010 *fttmr010; + bool is_ast2400; int irq; struct clk *clk; int ret; + u32 val; /* * These implementations require a clock reference. @@ -222,14 +256,38 @@ static int __init fttmr010_timer_init(struct device_node *np) goto out_unmap; } + /* + * The Aspeed AST2400 moves bits around in the control register, + * otherwise it works the same. + */ + is_ast2400 = of_device_is_compatible(np, "aspeed,ast2400-timer"); + if (is_ast2400) { + fttmr010->t1_enable_val = TIMER_1_CR_ASPEED_ENABLE | + TIMER_1_CR_ASPEED_INT; + /* Downward not available */ + fttmr010->count_down = true; + } else { + fttmr010->t1_enable_val = TIMER_1_CR_ENABLE | TIMER_1_CR_INT; + } + /* * Reset the interrupt mask and status */ writel(TIMER_INT_ALL_MASK, fttmr010->base + TIMER_INTR_MASK); writel(0, fttmr010->base + TIMER_INTR_STATE); - /* Enable timer 1 count up, timer 2 count up */ - writel((TIMER_1_CR_UPDOWN | TIMER_2_CR_ENABLE | TIMER_2_CR_UPDOWN), - fttmr010->base + TIMER_CR); + + /* + * Enable timer 1 count up, timer 2 count up, except on Aspeed, + * where everything just counts down. + */ + if (is_ast2400) + val = TIMER_2_CR_ASPEED_ENABLE; + else { + val = TIMER_2_CR_ENABLE; + if (!fttmr010->count_down) + val |= TIMER_1_CR_UPDOWN | TIMER_2_CR_UPDOWN; + } + writel(val, fttmr010->base + TIMER_CR); /* * Setup free-running clocksource timer (interrupts @@ -237,13 +295,22 @@ static int __init fttmr010_timer_init(struct device_node *np) */ local_fttmr = fttmr010; writel(0, fttmr010->base + TIMER2_COUNT); - writel(0, fttmr010->base + TIMER2_LOAD); writel(0, fttmr010->base + TIMER2_MATCH1); writel(0, fttmr010->base + TIMER2_MATCH2); - clocksource_mmio_init(fttmr010->base + TIMER2_COUNT, - "FTTMR010-TIMER2", - fttmr010->tick_rate, - 300, 32, clocksource_mmio_readl_up); + + if (fttmr010->count_down) { + writel(~0, fttmr010->base + TIMER2_LOAD); + clocksource_mmio_init(fttmr010->base + TIMER2_COUNT, + "FTTMR010-TIMER2", + fttmr010->tick_rate, + 300, 32, clocksource_mmio_readl_down); + } else { + writel(0, fttmr010->base + TIMER2_LOAD); + clocksource_mmio_init(fttmr010->base + TIMER2_COUNT, + "FTTMR010-TIMER2", + fttmr010->tick_rate, + 300, 32, clocksource_mmio_readl_up); + } sched_clock_register(fttmr010_read_sched_clock, 32, fttmr010->tick_rate); @@ -290,3 +357,5 @@ out_disable_clock: } CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_init); CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", fttmr010_timer_init); +CLOCKSOURCE_OF_DECLARE(moxart, "moxa,moxart-timer", fttmr010_timer_init); +CLOCKSOURCE_OF_DECLARE(aspeed, "aspeed,ast2400-timer", fttmr010_timer_init); -- cgit v1.2.3-58-ga151 From a6fbb9c4cc80bbbe5a088c3b64d1e41eee16b090 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 25 May 2017 22:19:29 +0200 Subject: clocksource/drivers/fttmr010: Add AST2500 compatible string Also clean up space-before-tab issues in the documentation. Signed-off-by: Andrew Jeffery Acked-by: Joel Stanley Acked-by: Rob Herring Reviewed-by: Linus Walleij Signed-off-by: Daniel Lezcano --- Documentation/devicetree/bindings/timer/faraday,fttmr010.txt | 2 ++ drivers/clocksource/timer-fttmr010.c | 3 ++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt b/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt index 6e18bd662ccb..195792270414 100644 --- a/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt +++ b/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt @@ -10,6 +10,8 @@ Required properties: "cortina,gemini-timer", "faraday,fttmr010" "moxa,moxart-timer", "faraday,fttmr010" "aspeed,ast2400-timer" + "aspeed,ast2500-timer" + - reg : Should contain registers location and length - interrupts : Should contain the three timer interrupts usually with flags for falling edge diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index f8801507a687..68982ad8908e 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -358,4 +358,5 @@ out_disable_clock: CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_init); CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", fttmr010_timer_init); CLOCKSOURCE_OF_DECLARE(moxart, "moxa,moxart-timer", fttmr010_timer_init); -CLOCKSOURCE_OF_DECLARE(aspeed, "aspeed,ast2400-timer", fttmr010_timer_init); +CLOCKSOURCE_OF_DECLARE(ast2400, "aspeed,ast2400-timer", fttmr010_timer_init); +CLOCKSOURCE_OF_DECLARE(ast2500, "aspeed,ast2500-timer", fttmr010_timer_init); -- cgit v1.2.3-58-ga151 From ef89718ab685e40887bb76d4e7664a931306a2a4 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Fri, 26 May 2017 10:38:07 +0200 Subject: clocksource/drivers/fttmr010: Fix aspeed-2500 initialization The recent changes made the fttmr010 to be more generic and support different timers with a very few differences like moxart or aspeed. The aspeed timer uses a countdown and there is a test against the aspeed2400 compatible string to set a flag. With the previous patch, we added the aspeed2500 compatible string but without taking care of setting the countdown flag. Fix this by specifiying a init function and pass the aspeed flag to a common init function. Reviewed-by: Linus Walleij Tested-by: Andrew Jeffery Reviewed-by: Andrew Jeffery Acked-by: Joel Stanley Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-fttmr010.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index 68982ad8908e..d96190e85c66 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -210,10 +210,9 @@ static irqreturn_t fttmr010_timer_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } -static int __init fttmr010_timer_init(struct device_node *np) +static int __init fttmr010_common_init(struct device_node *np, bool is_aspeed) { struct fttmr010 *fttmr010; - bool is_ast2400; int irq; struct clk *clk; int ret; @@ -260,8 +259,7 @@ static int __init fttmr010_timer_init(struct device_node *np) * The Aspeed AST2400 moves bits around in the control register, * otherwise it works the same. */ - is_ast2400 = of_device_is_compatible(np, "aspeed,ast2400-timer"); - if (is_ast2400) { + if (is_aspeed) { fttmr010->t1_enable_val = TIMER_1_CR_ASPEED_ENABLE | TIMER_1_CR_ASPEED_INT; /* Downward not available */ @@ -280,7 +278,7 @@ static int __init fttmr010_timer_init(struct device_node *np) * Enable timer 1 count up, timer 2 count up, except on Aspeed, * where everything just counts down. */ - if (is_ast2400) + if (is_aspeed) val = TIMER_2_CR_ASPEED_ENABLE; else { val = TIMER_2_CR_ENABLE; @@ -355,8 +353,19 @@ out_disable_clock: return ret; } + +static __init int aspeed_timer_init(struct device_node *np) +{ + return fttmr010_common_init(np, true); +} + +static __init int fttmr010_timer_init(struct device_node *np) +{ + return fttmr010_common_init(np, false); +} + CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_init); CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", fttmr010_timer_init); CLOCKSOURCE_OF_DECLARE(moxart, "moxa,moxart-timer", fttmr010_timer_init); -CLOCKSOURCE_OF_DECLARE(ast2400, "aspeed,ast2400-timer", fttmr010_timer_init); -CLOCKSOURCE_OF_DECLARE(ast2500, "aspeed,ast2500-timer", fttmr010_timer_init); +CLOCKSOURCE_OF_DECLARE(ast2400, "aspeed,ast2400-timer", aspeed_timer_init); +CLOCKSOURCE_OF_DECLARE(ast2500, "aspeed,ast2500-timer", aspeed_timer_init); -- cgit v1.2.3-58-ga151 From 8e0931022e12e45bab9afe01e830d697d9c8e73d Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Fri, 26 May 2017 15:30:34 +0200 Subject: Revert "clockevents: Add a clkevt-of mechanism like clksrc-of" After discussing it, this feature is dropped as it is not considered adequate: https://patchwork.kernel.org/patch/9639317/ There is no user of this macro yet, so there is no impact on the drivers. This reverts commit 376bc27150f180d9f5eddec6a14117780177589d. Cc: Mark Rutland Signed-off-by: Daniel Lezcano --- drivers/clocksource/Kconfig | 7 ----- drivers/clocksource/Makefile | 1 - drivers/clocksource/clkevt-probe.c | 56 -------------------------------------- include/asm-generic/vmlinux.lds.h | 2 -- include/linux/clockchips.h | 9 ------ 5 files changed, 75 deletions(-) delete mode 100644 drivers/clocksource/clkevt-probe.c diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 1b22ade4c8f1..623fcc69e9a1 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -5,10 +5,6 @@ config CLKSRC_OF bool select CLKSRC_PROBE -config CLKEVT_OF - bool - select CLKEVT_PROBE - config CLKSRC_ACPI bool select CLKSRC_PROBE @@ -16,9 +12,6 @@ config CLKSRC_ACPI config CLKSRC_PROBE bool -config CLKEVT_PROBE - bool - config CLKSRC_I8253 bool diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index cf0c30b6ec1f..cad713c53e7f 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -1,5 +1,4 @@ obj-$(CONFIG_CLKSRC_PROBE) += clksrc-probe.o -obj-$(CONFIG_CLKEVT_PROBE) += clkevt-probe.o obj-$(CONFIG_ATMEL_PIT) += timer-atmel-pit.o obj-$(CONFIG_ATMEL_ST) += timer-atmel-st.o obj-$(CONFIG_ATMEL_TCB_CLKSRC) += tcb_clksrc.o diff --git a/drivers/clocksource/clkevt-probe.c b/drivers/clocksource/clkevt-probe.c deleted file mode 100644 index eb89b502acbd..000000000000 --- a/drivers/clocksource/clkevt-probe.c +++ /dev/null @@ -1,56 +0,0 @@ -/* - * Copyright (c) 2016, Linaro Ltd. All rights reserved. - * Daniel Lezcano - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - */ - -#include -#include -#include - -extern struct of_device_id __clkevt_of_table[]; - -static const struct of_device_id __clkevt_of_table_sentinel - __used __section(__clkevt_of_table_end); - -int __init clockevent_probe(void) -{ - struct device_node *np; - const struct of_device_id *match; - of_init_fn_1_ret init_func; - int ret, clockevents = 0; - - for_each_matching_node_and_match(np, __clkevt_of_table, &match) { - if (!of_device_is_available(np)) - continue; - - init_func = match->data; - - ret = init_func(np); - if (ret) { - pr_warn("Failed to initialize '%s' (%d)\n", - np->name, ret); - continue; - } - - clockevents++; - } - - if (!clockevents) { - pr_crit("%s: no matching clockevent found\n", __func__); - return -ENODEV; - } - - return 0; -} diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 314a0b9219c6..401d324bcede 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -173,7 +173,6 @@ KEEP(*(__##name##_of_table_end)) #define CLKSRC_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, clksrc) -#define CLKEVT_OF_TABLES() OF_TABLE(CONFIG_CLKEVT_OF, clkevt) #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) #define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu) @@ -558,7 +557,6 @@ CLK_OF_TABLES() \ RESERVEDMEM_OF_TABLES() \ CLKSRC_OF_TABLES() \ - CLKEVT_OF_TABLES() \ IOMMU_OF_TABLES() \ CPU_METHOD_OF_TABLES() \ CPUIDLE_METHOD_OF_TABLES() \ diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h index acc9ce05e5f0..a116926598fd 100644 --- a/include/linux/clockchips.h +++ b/include/linux/clockchips.h @@ -223,13 +223,4 @@ static inline void tick_setup_hrtimer_broadcast(void) { } #endif /* !CONFIG_GENERIC_CLOCKEVENTS */ -#define CLOCKEVENT_OF_DECLARE(name, compat, fn) \ - OF_DECLARE_1_RET(clkevt, name, compat, fn) - -#ifdef CONFIG_CLKEVT_PROBE -extern int clockevent_probe(void); -#else -static inline int clockevent_probe(void) { return 0; } -#endif - #endif /* _LINUX_CLOCKCHIPS_H */ -- cgit v1.2.3-58-ga151 From c6503be587e9c5c0aac4e2b45de982352f676a5b Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 12 Jun 2017 17:21:26 +0200 Subject: posix-timers: Fix inverted SIGEV_NONE logic in common_timer_get() The refactoring of the posix-timer core to allow better code sharing introduced inverted logic vs. SIGEV_NONE timers in common_timer_get(). That causes hrtimer_forward() to be called on active timers, which rightfully triggers the warning hrtimer_forward(). Make sig_none what it says: signal mode == SIGEV_NONE. Fixes: 91d57bae0868 ("posix-timers: Make use of forward/remaining callbacks") Reported-by: Ye Xiaolong Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170609104457.GA39907@inn.lkp.intel.com --- kernel/time/posix-timers.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 6e7a70b1bf37..b53a0b562516 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -644,7 +644,7 @@ void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) struct timespec64 ts64; bool sig_none; - sig_none = (timr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE; + sig_none = (timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE; iv = timr->it_interval; /* interval timer ? */ -- cgit v1.2.3-58-ga151 From 5c7a3a3d20a4e175304c0e23809e3d70be8fed8a Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 12 Jun 2017 19:44:09 +0200 Subject: posix-timers: Zero out oldval itimerspec The recent posix timer rework moved the clearing of the itimerspec to the real syscall implementation, but forgot that the kclock->timer_get() is used by timer_settime() as well. That results in an uninitialized variable and bogus values returned to user space. Add the missing memset to timer_settime(). Fixes: eabdec043853 ("posix-timers: Zero settings value in common code") Reported-by: Andrei Vagin Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Cc: Cyrill Gorcunov Link: http://lkml.kernel.org/r/20170609201156.GB21491@outlook.office365.com --- kernel/time/posix-timers.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index b53a0b562516..88517dcfe0ca 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -828,6 +828,8 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, if (!timespec64_valid(&new_spec64.it_interval) || !timespec64_valid(&new_spec64.it_value)) return -EINVAL; + if (rtn) + memset(rtn, 0, sizeof(*rtn)); retry: timr = lock_timer(timer_id, &flag); if (!timr) -- cgit v1.2.3-58-ga151 From 67edab48caeb75d412706f4b9d3107afd1e07623 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 12 Jun 2017 19:39:49 +0200 Subject: posix-timers: Handle relative posix-timers correctly The recent rework of the posix timer internals broke the magic posix mechanism, which requires that relative timers are not affected by modifications of the underlying clock. That means relative CLOCK_REALTIME timers cannot use CLOCK_REALTIME, because that can be set and adjusted. The underlying hrtimer switches the clock for these timers to CLOCK_MONOTONIC. That still works, but reading the remaining time of such a timer has been broken in the rework. The old code used the hrtimer internals directly and avoided the posix clock callbacks. Now common_timer_get() uses the underlying kclock->timer_get() callback, which is still CLOCK_REALTIME based. So the remaining time of such a timer is calculated against the wrong time base. Handle it by switching the k_itimer->kclock pointer according to the resulting hrtimer mode. k_itimer->it_clock still contains CLOCK_REALTIME because the timer might be set with ABSTIME later and then it needs to switch back to the realtime posix clock implementation. Fixes: eae1c4ae275f ("posix-timers: Make use of cancel/arm callbacks") Reported-by: Andrei Vagin Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Cc: Cyrill Gorcunov Link: http://lkml.kernel.org/r/20170609201156.GB21491@outlook.office365.com --- kernel/time/posix-timers.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 88517dcfe0ca..58c0f60b132f 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -72,6 +72,7 @@ static DEFINE_SPINLOCK(hash_lock); static const struct k_clock * const posix_clocks[]; static const struct k_clock *clockid_to_kclock(const clockid_t id); +static const struct k_clock clock_realtime, clock_monotonic; /* * we assume that the new SIGEV_THREAD_ID shares no bits with the other @@ -750,6 +751,18 @@ static void common_hrtimer_arm(struct k_itimer *timr, ktime_t expires, enum hrtimer_mode mode; mode = absolute ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL; + /* + * Posix magic: Relative CLOCK_REALTIME timers are not affected by + * clock modifications, so they become CLOCK_MONOTONIC based under the + * hood. See hrtimer_init(). Update timr->kclock, so the generic + * functions which use timr->kclock->clock_get() work. + * + * Note: it_clock stays unmodified, because the next timer_set() might + * use ABSTIME, so it needs to switch back. + */ + if (timr->it_clock == CLOCK_REALTIME) + timr->kclock = absolute ? &clock_realtime : &clock_monotonic; + hrtimer_init(&timr->it.real.timer, timr->it_clock, mode); timr->it.real.timer.function = posix_timer_fn; -- cgit v1.2.3-58-ga151 From 86a9c446c13ecd8793ea8599761322aed125d542 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:26 +0100 Subject: posix-cpu-timers: Move copyout of timespec into do_cpu_nanosleep() The posix-cpu-timer nanosleep() implementation can be simplified by moving the copy out of the remaining time to do_cpu_nanosleep() which is shared between the real nanosleep function and the restart function. The pointer to the timespec64 which is updated has to be stored in the restart block anyway. Instead of storing it only in the restart case, store it before calling do_cpu_nanosleep() and copy the remaining time in the signal exit path. [ tglx: Added changelog ] Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-1-viro@ZenIV.linux.org.uk --- kernel/time/posix-cpu-timers.c | 63 +++++++++++++++++++----------------------- 1 file changed, 28 insertions(+), 35 deletions(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index cb4a4eb44279..239fff980fd0 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1226,9 +1226,10 @@ void set_process_cpu_timer(struct task_struct *tsk, unsigned int clock_idx, } static int do_cpu_nanosleep(const clockid_t which_clock, int flags, - struct timespec64 *rqtp, struct itimerspec64 *it) + struct timespec64 *rqtp) { struct k_itimer timer; + struct itimerspec64 it; int error; /* @@ -1242,12 +1243,14 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, timer.it_process = current; if (!error) { static struct itimerspec64 zero_it; + struct restart_block *restart = ¤t->restart_block; + struct timespec __user *rmtp; - memset(it, 0, sizeof *it); - it->it_value = *rqtp; + memset(&it, 0, sizeof it); + it.it_value = *rqtp; spin_lock_irq(&timer.it_lock); - error = posix_cpu_timer_set(&timer, flags, it, NULL); + error = posix_cpu_timer_set(&timer, flags, &it, NULL); if (error) { spin_unlock_irq(&timer.it_lock); return error; @@ -1277,7 +1280,7 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, * We were interrupted by a signal. */ *rqtp = ns_to_timespec64(timer.it.cpu.expires); - error = posix_cpu_timer_set(&timer, 0, &zero_it, it); + error = posix_cpu_timer_set(&timer, 0, &zero_it, &it); if (!error) { /* * Timer is now unarmed, deletion can not fail. @@ -1297,7 +1300,7 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, spin_unlock_irq(&timer.it_lock); } - if ((it->it_value.tv_sec | it->it_value.tv_nsec) == 0) { + if ((it.it_value.tv_sec | it.it_value.tv_nsec) == 0) { /* * It actually did fire already. */ @@ -1305,6 +1308,18 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, } error = -ERESTART_RESTARTBLOCK; + /* + * Report back to the user the time still remaining. + */ + rmtp = restart->nanosleep.rmtp; + if (rmtp) { + struct timespec ts; + + ts = timespec64_to_timespec(it.it_value); + if (copy_to_user(rmtp, &ts, sizeof(*rmtp))) + return -EFAULT; + } + restart->nanosleep.expires = timespec64_to_ns(rqtp); } return error; @@ -1316,10 +1331,13 @@ static int posix_cpu_nsleep(const clockid_t which_clock, int flags, struct timespec64 *rqtp, struct timespec __user *rmtp) { struct restart_block *restart_block = ¤t->restart_block; - struct itimerspec64 it; - struct timespec ts; int error; + if (flags & TIMER_ABSTIME) + rmtp = NULL; + + restart_block->nanosleep.rmtp = rmtp; + /* * Diagnose required errors first. */ @@ -1328,23 +1346,15 @@ static int posix_cpu_nsleep(const clockid_t which_clock, int flags, CPUCLOCK_PID(which_clock) == task_pid_vnr(current))) return -EINVAL; - error = do_cpu_nanosleep(which_clock, flags, rqtp, &it); + error = do_cpu_nanosleep(which_clock, flags, rqtp); if (error == -ERESTART_RESTARTBLOCK) { if (flags & TIMER_ABSTIME) return -ERESTARTNOHAND; - /* - * Report back to the user the time still remaining. - */ - ts = timespec64_to_timespec(it.it_value); - if (rmtp && copy_to_user(rmtp, &ts, sizeof(*rmtp))) - return -EFAULT; restart_block->fn = posix_cpu_nsleep_restart; restart_block->nanosleep.clockid = which_clock; - restart_block->nanosleep.rmtp = rmtp; - restart_block->nanosleep.expires = timespec64_to_ns(rqtp); } return error; } @@ -1352,28 +1362,11 @@ static int posix_cpu_nsleep(const clockid_t which_clock, int flags, static long posix_cpu_nsleep_restart(struct restart_block *restart_block) { clockid_t which_clock = restart_block->nanosleep.clockid; - struct itimerspec64 it; struct timespec64 t; - struct timespec tmp; - int error; t = ns_to_timespec64(restart_block->nanosleep.expires); - error = do_cpu_nanosleep(which_clock, TIMER_ABSTIME, &t, &it); - - if (error == -ERESTART_RESTARTBLOCK) { - struct timespec __user *rmtp = restart_block->nanosleep.rmtp; - /* - * Report back to the user the time still remaining. - */ - tmp = timespec64_to_timespec(it.it_value); - if (rmtp && copy_to_user(rmtp, &tmp, sizeof(*rmtp))) - return -EFAULT; - - restart_block->nanosleep.expires = timespec64_to_ns(&t); - } - return error; - + return do_cpu_nanosleep(which_clock, TIMER_ABSTIME, &t); } #define PROCESS_CLOCK MAKE_PROCESS_CPUCLOCK(0, CPUCLOCK_SCHED) -- cgit v1.2.3-58-ga151 From 15f27ce24cb613e6e01ce27c4094c55e55dde5d4 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:27 +0100 Subject: alarmtimer: Move copyout and freeze handling into alarmtimer_do_nsleep() The alarmtimer nanosleep() implementation can be simplified by moving the copy out of the remaining time to alarmtimer_do_nsleep() which is shared between the real nanosleep function and the restart function. The pointer to the timespec64 which is updated has to be stored in the restart block anyway. Instead of storing it only in the restart case, store it before calling alarmtimer_do_nsleep() and copy the remaining time in the signal exit path. [ tglx: Added changelog ] Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-2-viro@ZenIV.linux.org.uk --- kernel/time/alarmtimer.c | 102 +++++++++++++++-------------------------------- 1 file changed, 32 insertions(+), 70 deletions(-) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index d8a7a7e214de..ac6e9bc6cc59 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -688,8 +688,10 @@ static enum alarmtimer_restart alarmtimer_nsleep_wakeup(struct alarm *alarm, * * Sets the alarm timer and sleeps until it is fired or interrupted. */ -static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp) +static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp, + enum alarmtimer_type type) { + struct timespec __user *rmtp; alarm->data = (void *)current; do { set_current_state(TASK_INTERRUPTIBLE); @@ -702,36 +704,26 @@ static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp) __set_current_state(TASK_RUNNING); - return (alarm->data == NULL); -} - - -/** - * update_rmtp - Update remaining timespec value - * @exp: expiration time - * @type: timer type - * @rmtp: user pointer to remaining timepsec value - * - * Helper function that fills in rmtp value with time between - * now and the exp value - */ -static int update_rmtp(ktime_t exp, enum alarmtimer_type type, - struct timespec __user *rmtp) -{ - struct timespec rmt; - ktime_t rem; - - rem = ktime_sub(exp, alarm_bases[type].gettime()); - - if (rem <= 0) + if (!alarm->data) return 0; - rmt = ktime_to_timespec(rem); - if (copy_to_user(rmtp, &rmt, sizeof(*rmtp))) - return -EFAULT; + if (freezing(current)) + alarmtimer_freezerset(absexp, type); + rmtp = current->restart_block.nanosleep.rmtp; + if (rmtp) { + struct timespec rmt; + ktime_t rem; - return 1; + rem = ktime_sub(absexp, alarm_bases[type].gettime()); + if (rem <= 0) + return 0; + rmt = ktime_to_timespec(rem); + + if (copy_to_user(rmtp, &rmt, sizeof(*rmtp))) + return -EFAULT; + } + return -ERESTART_RESTARTBLOCK; } /** @@ -743,32 +735,12 @@ static int update_rmtp(ktime_t exp, enum alarmtimer_type type, static long __sched alarm_timer_nsleep_restart(struct restart_block *restart) { enum alarmtimer_type type = restart->nanosleep.clockid; - ktime_t exp; - struct timespec __user *rmtp; + ktime_t exp = restart->nanosleep.expires; struct alarm alarm; - int ret = 0; - exp = restart->nanosleep.expires; alarm_init(&alarm, type, alarmtimer_nsleep_wakeup); - if (alarmtimer_do_nsleep(&alarm, exp)) - goto out; - - if (freezing(current)) - alarmtimer_freezerset(exp, type); - - rmtp = restart->nanosleep.rmtp; - if (rmtp) { - ret = update_rmtp(exp, type, rmtp); - if (ret <= 0) - goto out; - } - - - /* The other values in restart are already filled in */ - ret = -ERESTART_RESTARTBLOCK; -out: - return ret; + return alarmtimer_do_nsleep(&alarm, exp, type); } /** @@ -785,11 +757,16 @@ static int alarm_timer_nsleep(const clockid_t which_clock, int flags, struct timespec __user *rmtp) { enum alarmtimer_type type = clock2alarm(which_clock); - struct restart_block *restart; + struct restart_block *restart = ¤t->restart_block; struct alarm alarm; ktime_t exp; int ret = 0; + if (flags & TIMER_ABSTIME) + rmtp = NULL; + + restart->nanosleep.rmtp = rmtp; + if (!alarmtimer_get_rtcdev()) return -ENOTSUPP; @@ -808,32 +785,17 @@ static int alarm_timer_nsleep(const clockid_t which_clock, int flags, exp = ktime_add(now, exp); } - if (alarmtimer_do_nsleep(&alarm, exp)) - goto out; - - if (freezing(current)) - alarmtimer_freezerset(exp, type); + ret = alarmtimer_do_nsleep(&alarm, exp, type); + if (ret != -ERESTART_RESTARTBLOCK) + return ret; /* abs timers don't set remaining time or restart */ - if (flags == TIMER_ABSTIME) { - ret = -ERESTARTNOHAND; - goto out; - } - - if (rmtp) { - ret = update_rmtp(exp, type, rmtp); - if (ret <= 0) - goto out; - } + if (flags == TIMER_ABSTIME) + return -ERESTARTNOHAND; - restart = ¤t->restart_block; restart->fn = alarm_timer_nsleep_restart; restart->nanosleep.clockid = type; restart->nanosleep.expires = exp; - restart->nanosleep.rmtp = rmtp; - ret = -ERESTART_RESTARTBLOCK; - -out: return ret; } -- cgit v1.2.3-58-ga151 From 192a82f9003fe8fabd6088aa646e829225a94c55 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:28 +0100 Subject: hrtimer_nanosleep(): Pass rmtp in restart_block Store the pointer to the timespec which gets updated with the remaining time in the restart block and remove the function argument. [ tglx: Added changelog ] Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-3-viro@ZenIV.linux.org.uk --- include/linux/hrtimer.h | 1 - kernel/compat.c | 6 +++--- kernel/time/hrtimer.c | 11 ++++++----- kernel/time/posix-stubs.c | 5 ++++- kernel/time/posix-timers.c | 5 ++++- 5 files changed, 17 insertions(+), 11 deletions(-) diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 8c5b10eb7265..b80c34f6fd4b 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -453,7 +453,6 @@ static inline u64 hrtimer_forward_now(struct hrtimer *timer, /* Precise sleep: */ extern long hrtimer_nanosleep(struct timespec64 *rqtp, - struct timespec __user *rmtp, const enum hrtimer_mode mode, const clockid_t clockid); extern long hrtimer_nanosleep_restart(struct restart_block *restart_block); diff --git a/kernel/compat.c b/kernel/compat.c index 933bcb31ae10..cc9ba9d29b47 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -253,9 +253,9 @@ COMPAT_SYSCALL_DEFINE2(nanosleep, struct compat_timespec __user *, rqtp, oldfs = get_fs(); set_fs(KERNEL_DS); - ret = hrtimer_nanosleep(&tu64, - rmtp ? (struct timespec __user *)&rmt : NULL, - HRTIMER_MODE_REL, CLOCK_MONOTONIC); + current->restart_block.nanosleep.rmtp = + rmtp ? (struct timespec __user *)&rmt : NULL; + ret = hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC); set_fs(oldfs); /* diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index ac053bb5296e..4ae777f159de 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1503,10 +1503,11 @@ out: return ret; } -long hrtimer_nanosleep(struct timespec64 *rqtp, struct timespec __user *rmtp, +long hrtimer_nanosleep(struct timespec64 *rqtp, const enum hrtimer_mode mode, const clockid_t clockid) { - struct restart_block *restart; + struct restart_block *restart = ¤t->restart_block; + struct timespec __user *rmtp; struct hrtimer_sleeper t; int ret = 0; u64 slack; @@ -1526,16 +1527,15 @@ long hrtimer_nanosleep(struct timespec64 *rqtp, struct timespec __user *rmtp, goto out; } + rmtp = restart->nanosleep.rmtp; if (rmtp) { ret = update_rmtp(&t.timer, rmtp); if (ret <= 0) goto out; } - restart = ¤t->restart_block; restart->fn = hrtimer_nanosleep_restart; restart->nanosleep.clockid = t.timer.base->clockid; - restart->nanosleep.rmtp = rmtp; restart->nanosleep.expires = hrtimer_get_expires_tv64(&t.timer); ret = -ERESTART_RESTARTBLOCK; @@ -1557,7 +1557,8 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, if (!timespec64_valid(&tu64)) return -EINVAL; - return hrtimer_nanosleep(&tu64, rmtp, HRTIMER_MODE_REL, CLOCK_MONOTONIC); + current->restart_block.nanosleep.rmtp = rmtp; + return hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC); } /* diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index c0cd53eb018a..156a5e6f3bd2 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -115,7 +115,10 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, t64 = timespec_to_timespec64(t); if (!timespec64_valid(&t64)) return -EINVAL; - return hrtimer_nanosleep(&t64, rmtp, flags & TIMER_ABSTIME ? + if (flags & TIMER_ABSTIME) + rmtp = NULL; + current->restart_block.nanosleep.rmtp = rmtp; + return hrtimer_nanosleep(&t64, flags & TIMER_ABSTIME ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL, which_clock); default: diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 58c0f60b132f..1a9f59f8afc2 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1043,7 +1043,10 @@ SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, static int common_nsleep(const clockid_t which_clock, int flags, struct timespec64 *tsave, struct timespec __user *rmtp) { - return hrtimer_nanosleep(tsave, rmtp, flags & TIMER_ABSTIME ? + if (flags & TIMER_ABSTIME) + rmtp = NULL; + current->restart_block.nanosleep.rmtp = rmtp; + return hrtimer_nanosleep(tsave, flags & TIMER_ABSTIME ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL, which_clock); } -- cgit v1.2.3-58-ga151 From a7602681fc63f1a3ddd3da336296c9634c2ff974 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:29 +0100 Subject: hrtimer: Move copyout of remaining time to do_nanosleep() The hrtimer nanosleep() implementation can be simplified by moving the copy out of the remaining time to do_nanosleep() which is shared between the real nanosleep function and the restart function. The pointer to the timespec64 which is updated is already stored in the restart block at the call site, so the seperate handling of nanosleep and restart function can be avoided. [ tglx: Added changelog ] Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-4-viro@ZenIV.linux.org.uk --- kernel/time/hrtimer.c | 62 +++++++++++++++++---------------------------------- 1 file changed, 20 insertions(+), 42 deletions(-) diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 4ae777f159de..baa7b846b6e3 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1441,6 +1441,7 @@ EXPORT_SYMBOL_GPL(hrtimer_init_sleeper); static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mode) { + struct timespec __user *rmtp; hrtimer_init_sleeper(t, current); do { @@ -1457,48 +1458,33 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod __set_current_state(TASK_RUNNING); - return t->task == NULL; -} - -static int update_rmtp(struct hrtimer *timer, struct timespec __user *rmtp) -{ - struct timespec rmt; - ktime_t rem; - - rem = hrtimer_expires_remaining(timer); - if (rem <= 0) + if (!t->task) return 0; - rmt = ktime_to_timespec(rem); - if (copy_to_user(rmtp, &rmt, sizeof(*rmtp))) - return -EFAULT; - - return 1; + rmtp = current->restart_block.nanosleep.rmtp; + if (rmtp) { + struct timespec rmt; + ktime_t rem = hrtimer_expires_remaining(&t->timer); + if (rem <= 0) + return 0; + rmt = ktime_to_timespec(rem); + + if (copy_to_user(rmtp, &rmt, sizeof(*rmtp))) + return -EFAULT; + } + return -ERESTART_RESTARTBLOCK; } long __sched hrtimer_nanosleep_restart(struct restart_block *restart) { struct hrtimer_sleeper t; - struct timespec __user *rmtp; - int ret = 0; + int ret; hrtimer_init_on_stack(&t.timer, restart->nanosleep.clockid, HRTIMER_MODE_ABS); hrtimer_set_expires_tv64(&t.timer, restart->nanosleep.expires); - if (do_nanosleep(&t, HRTIMER_MODE_ABS)) - goto out; - - rmtp = restart->nanosleep.rmtp; - if (rmtp) { - ret = update_rmtp(&t.timer, rmtp); - if (ret <= 0) - goto out; - } - - /* The other values in restart are already filled in */ - ret = -ERESTART_RESTARTBLOCK; -out: + ret = do_nanosleep(&t, HRTIMER_MODE_ABS); destroy_hrtimer_on_stack(&t.timer); return ret; } @@ -1506,8 +1492,7 @@ out: long hrtimer_nanosleep(struct timespec64 *rqtp, const enum hrtimer_mode mode, const clockid_t clockid) { - struct restart_block *restart = ¤t->restart_block; - struct timespec __user *rmtp; + struct restart_block *restart; struct hrtimer_sleeper t; int ret = 0; u64 slack; @@ -1518,7 +1503,8 @@ long hrtimer_nanosleep(struct timespec64 *rqtp, hrtimer_init_on_stack(&t.timer, clockid, mode); hrtimer_set_expires_range_ns(&t.timer, timespec64_to_ktime(*rqtp), slack); - if (do_nanosleep(&t, mode)) + ret = do_nanosleep(&t, mode); + if (ret != -ERESTART_RESTARTBLOCK) goto out; /* Absolute timers do not update the rmtp value and restart: */ @@ -1527,18 +1513,10 @@ long hrtimer_nanosleep(struct timespec64 *rqtp, goto out; } - rmtp = restart->nanosleep.rmtp; - if (rmtp) { - ret = update_rmtp(&t.timer, rmtp); - if (ret <= 0) - goto out; - } - + restart = ¤t->restart_block; restart->fn = hrtimer_nanosleep_restart; restart->nanosleep.clockid = t.timer.base->clockid; restart->nanosleep.expires = hrtimer_get_expires_tv64(&t.timer); - - ret = -ERESTART_RESTARTBLOCK; out: destroy_hrtimer_on_stack(&t.timer); return ret; -- cgit v1.2.3-58-ga151 From 99e6c0e6ec349575886ca7daffc9cb7ec583176f Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:30 +0100 Subject: posix-timers: Store rmtp into restart_block in sys_clock_nanosleep() ... instead of doing that in every ->nsleep() instance Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-5-viro@ZenIV.linux.org.uk --- kernel/time/alarmtimer.c | 8 +------- kernel/time/posix-cpu-timers.c | 12 +++--------- kernel/time/posix-timers.c | 10 +++++----- kernel/time/posix-timers.h | 2 +- 4 files changed, 10 insertions(+), 22 deletions(-) diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index ac6e9bc6cc59..d859a3601ddd 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -753,8 +753,7 @@ static long __sched alarm_timer_nsleep_restart(struct restart_block *restart) * Handles clock_nanosleep calls against _ALARM clockids */ static int alarm_timer_nsleep(const clockid_t which_clock, int flags, - struct timespec64 *tsreq, - struct timespec __user *rmtp) + struct timespec64 *tsreq) { enum alarmtimer_type type = clock2alarm(which_clock); struct restart_block *restart = ¤t->restart_block; @@ -762,11 +761,6 @@ static int alarm_timer_nsleep(const clockid_t which_clock, int flags, ktime_t exp; int ret = 0; - if (flags & TIMER_ABSTIME) - rmtp = NULL; - - restart->nanosleep.rmtp = rmtp; - if (!alarmtimer_get_rtcdev()) return -ENOTSUPP; diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 239fff980fd0..ec6258c9cde5 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1328,16 +1328,11 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, static long posix_cpu_nsleep_restart(struct restart_block *restart_block); static int posix_cpu_nsleep(const clockid_t which_clock, int flags, - struct timespec64 *rqtp, struct timespec __user *rmtp) + struct timespec64 *rqtp) { struct restart_block *restart_block = ¤t->restart_block; int error; - if (flags & TIMER_ABSTIME) - rmtp = NULL; - - restart_block->nanosleep.rmtp = rmtp; - /* * Diagnose required errors first. */ @@ -1388,10 +1383,9 @@ static int process_cpu_timer_create(struct k_itimer *timer) return posix_cpu_timer_create(timer); } static int process_cpu_nsleep(const clockid_t which_clock, int flags, - struct timespec64 *rqtp, - struct timespec __user *rmtp) + struct timespec64 *rqtp) { - return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp, rmtp); + return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp); } static long process_cpu_nsleep_restart(struct restart_block *restart_block) { diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 1a9f59f8afc2..a3e5c01b430e 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1041,11 +1041,8 @@ SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, * nanosleep for monotonic and realtime clocks */ static int common_nsleep(const clockid_t which_clock, int flags, - struct timespec64 *tsave, struct timespec __user *rmtp) + struct timespec64 *tsave) { - if (flags & TIMER_ABSTIME) - rmtp = NULL; - current->restart_block.nanosleep.rmtp = rmtp; return hrtimer_nanosleep(tsave, flags & TIMER_ABSTIME ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL, which_clock); @@ -1070,8 +1067,11 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, t64 = timespec_to_timespec64(t); if (!timespec64_valid(&t64)) return -EINVAL; + if (flags & TIMER_ABSTIME) + rmtp = NULL; + current->restart_block.nanosleep.rmtp = rmtp; - return kc->nsleep(which_clock, flags, &t64, rmtp); + return kc->nsleep(which_clock, flags, &t64); } /* diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h index b086f5ba2f5b..bfd9e15c6ce0 100644 --- a/kernel/time/posix-timers.h +++ b/kernel/time/posix-timers.h @@ -10,7 +10,7 @@ struct k_clock { int (*clock_adj)(const clockid_t which_clock, struct timex *tx); int (*timer_create)(struct k_itimer *timer); int (*nsleep)(const clockid_t which_clock, int flags, - struct timespec64 *, struct timespec __user *); + struct timespec64 *); long (*nsleep_restart)(struct restart_block *restart_block); int (*timer_set)(struct k_itimer *timr, int flags, struct itimerspec64 *new_setting, -- cgit v1.2.3-58-ga151 From edbeda46322fbcb15af2d2d0f2daffb0cd349a5a Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:31 +0100 Subject: time/posix-timers: Move the compat copyouts to the nanosleep implementations Turn restart_block.nanosleep.{rmtp,compat_rmtp} into a tagged union (kind = 1 -> native, kind = 2 -> compat, kind = 0 -> nothing) and make the places doing actual copyout handle compat as well as native (that will become a helper in the next commit). Result: compat wrappers, messing with reassignments, etc. are gone. [ tglx: Folded in a variant of Peter Zijlstras enum patch ] Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-6-viro@ZenIV.linux.org.uk --- include/linux/posix-timers.h | 2 - include/linux/restart_block.h | 15 ++++- kernel/compat.c | 131 ----------------------------------------- kernel/time/alarmtimer.c | 16 +++-- kernel/time/hrtimer.c | 42 +++++++++++-- kernel/time/posix-cpu-timers.c | 20 +++++-- kernel/time/posix-stubs.c | 55 +++++++++++++---- kernel/time/posix-timers.c | 32 +++++++--- 8 files changed, 142 insertions(+), 171 deletions(-) diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h index 667095dbcd37..29f1b7f09ced 100644 --- a/include/linux/posix-timers.h +++ b/include/linux/posix-timers.h @@ -110,8 +110,6 @@ void posix_cpu_timers_exit_group(struct task_struct *task); void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx, u64 *newval, u64 *oldval); -long clock_nanosleep_restart(struct restart_block *restart_block); - void update_rlimit_cpu(struct task_struct *task, unsigned long rlim_new); void posixtimer_rearm(struct siginfo *info); diff --git a/include/linux/restart_block.h b/include/linux/restart_block.h index 0d905d8ec553..19df8422606c 100644 --- a/include/linux/restart_block.h +++ b/include/linux/restart_block.h @@ -11,6 +11,14 @@ struct timespec; struct compat_timespec; struct pollfd; +enum timespec_type { + TT_NONE = 0, + TT_NATIVE = 1, +#ifdef CONFIG_COMPAT + TT_COMPAT = 2, +#endif +}; + /* * System call restart block. */ @@ -29,10 +37,13 @@ struct restart_block { /* For nanosleep */ struct { clockid_t clockid; - struct timespec __user *rmtp; + enum timespec_type type; + union { + struct timespec __user *rmtp; #ifdef CONFIG_COMPAT - struct compat_timespec __user *compat_rmtp; + struct compat_timespec __user *compat_rmtp; #endif + }; u64 expires; } nanosleep; /* For poll */ diff --git a/kernel/compat.c b/kernel/compat.c index cc9ba9d29b47..23afa26f574b 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -213,82 +213,6 @@ int compat_convert_timespec(struct timespec __user **kts, return 0; } -static long compat_nanosleep_restart(struct restart_block *restart) -{ - struct compat_timespec __user *rmtp; - struct timespec rmt; - mm_segment_t oldfs; - long ret; - - restart->nanosleep.rmtp = (struct timespec __user *) &rmt; - oldfs = get_fs(); - set_fs(KERNEL_DS); - ret = hrtimer_nanosleep_restart(restart); - set_fs(oldfs); - - if (ret == -ERESTART_RESTARTBLOCK) { - rmtp = restart->nanosleep.compat_rmtp; - - if (rmtp && compat_put_timespec(&rmt, rmtp)) - return -EFAULT; - } - - return ret; -} - -COMPAT_SYSCALL_DEFINE2(nanosleep, struct compat_timespec __user *, rqtp, - struct compat_timespec __user *, rmtp) -{ - struct timespec tu, rmt; - struct timespec64 tu64; - mm_segment_t oldfs; - long ret; - - if (compat_get_timespec(&tu, rqtp)) - return -EFAULT; - - tu64 = timespec_to_timespec64(tu); - if (!timespec64_valid(&tu64)) - return -EINVAL; - - oldfs = get_fs(); - set_fs(KERNEL_DS); - current->restart_block.nanosleep.rmtp = - rmtp ? (struct timespec __user *)&rmt : NULL; - ret = hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC); - set_fs(oldfs); - - /* - * hrtimer_nanosleep() can only return 0 or - * -ERESTART_RESTARTBLOCK here because: - * - * - we call it with HRTIMER_MODE_REL and therefor exclude the - * -ERESTARTNOHAND return path. - * - * - we supply the rmtp argument from the task stack (due to - * the necessary compat conversion. So the update cannot - * fail, which excludes the -EFAULT return path as well. If - * it fails nevertheless we have a bigger problem and wont - * reach this place anymore. - * - * - if the return value is 0, we do not have to update rmtp - * because there is no remaining time. - * - * We check for -ERESTART_RESTARTBLOCK nevertheless if the - * core implementation decides to return random nonsense. - */ - if (ret == -ERESTART_RESTARTBLOCK) { - struct restart_block *restart = ¤t->restart_block; - - restart->fn = compat_nanosleep_restart; - restart->nanosleep.compat_rmtp = rmtp; - - if (rmtp && compat_put_timespec(&rmt, rmtp)) - return -EFAULT; - } - return ret; -} - static inline long get_compat_itimerval(struct itimerval *o, struct compat_itimerval __user *i) { @@ -821,61 +745,6 @@ COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock, return err; } -static long compat_clock_nanosleep_restart(struct restart_block *restart) -{ - long err; - mm_segment_t oldfs; - struct timespec tu; - struct compat_timespec __user *rmtp = restart->nanosleep.compat_rmtp; - - restart->nanosleep.rmtp = (struct timespec __user *) &tu; - oldfs = get_fs(); - set_fs(KERNEL_DS); - err = clock_nanosleep_restart(restart); - set_fs(oldfs); - - if ((err == -ERESTART_RESTARTBLOCK) && rmtp && - compat_put_timespec(&tu, rmtp)) - return -EFAULT; - - if (err == -ERESTART_RESTARTBLOCK) { - restart->fn = compat_clock_nanosleep_restart; - restart->nanosleep.compat_rmtp = rmtp; - } - return err; -} - -COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags, - struct compat_timespec __user *, rqtp, - struct compat_timespec __user *, rmtp) -{ - long err; - mm_segment_t oldfs; - struct timespec in, out; - struct restart_block *restart; - - if (compat_get_timespec(&in, rqtp)) - return -EFAULT; - - oldfs = get_fs(); - set_fs(KERNEL_DS); - err = sys_clock_nanosleep(which_clock, flags, - (struct timespec __user *) &in, - (struct timespec __user *) &out); - set_fs(oldfs); - - if ((err == -ERESTART_RESTARTBLOCK) && rmtp && - compat_put_timespec(&out, rmtp)) - return -EFAULT; - - if (err == -ERESTART_RESTARTBLOCK) { - restart = ¤t->restart_block; - restart->fn = compat_clock_nanosleep_restart; - restart->nanosleep.compat_rmtp = rmtp; - } - return err; -} - /* * We currently only need the following fields from the sigevent * structure: sigev_value, sigev_signo, sig_notify and (sometimes diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index d859a3601ddd..57bcf94ee132 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -27,6 +27,7 @@ #include #include #include +#include #include "posix-timers.h" @@ -691,7 +692,7 @@ static enum alarmtimer_restart alarmtimer_nsleep_wakeup(struct alarm *alarm, static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp, enum alarmtimer_type type) { - struct timespec __user *rmtp; + struct restart_block *restart; alarm->data = (void *)current; do { set_current_state(TASK_INTERRUPTIBLE); @@ -709,8 +710,8 @@ static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp, if (freezing(current)) alarmtimer_freezerset(absexp, type); - rmtp = current->restart_block.nanosleep.rmtp; - if (rmtp) { + restart = ¤t->restart_block; + if (restart->nanosleep.type != TT_NONE) { struct timespec rmt; ktime_t rem; @@ -720,7 +721,14 @@ static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp, return 0; rmt = ktime_to_timespec(rem); - if (copy_to_user(rmtp, &rmt, sizeof(*rmtp))) +#ifdef CONFIG_COMPAT + if (restart->nanosleep.type == TT_COMPAT) { + if (compat_put_timespec(&rmt, + restart->nanosleep.compat_rmtp)) + return -EFAULT; + } else +#endif + if (copy_to_user(restart->nanosleep.rmtp, &rmt, sizeof(rmt))) return -EFAULT; } return -ERESTART_RESTARTBLOCK; diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index baa7b846b6e3..5370da8fc0a4 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -51,6 +51,7 @@ #include #include #include +#include #include @@ -1441,7 +1442,8 @@ EXPORT_SYMBOL_GPL(hrtimer_init_sleeper); static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mode) { - struct timespec __user *rmtp; + struct restart_block *restart; + hrtimer_init_sleeper(t, current); do { @@ -1461,15 +1463,23 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod if (!t->task) return 0; - rmtp = current->restart_block.nanosleep.rmtp; - if (rmtp) { - struct timespec rmt; + restart = ¤t->restart_block; + if (restart->nanosleep.type != TT_NONE) { ktime_t rem = hrtimer_expires_remaining(&t->timer); + struct timespec rmt; + if (rem <= 0) return 0; rmt = ktime_to_timespec(rem); - if (copy_to_user(rmtp, &rmt, sizeof(*rmtp))) +#ifdef CONFIG_COMPAT + if (restart->nanosleep.type == TT_COMPAT) { + if (compat_put_timespec(&rmt, + restart->nanosleep.compat_rmtp)) + return -EFAULT; + } else +#endif + if (copy_to_user(restart->nanosleep.rmtp, &rmt, sizeof(rmt))) return -EFAULT; } return -ERESTART_RESTARTBLOCK; @@ -1535,10 +1545,32 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, if (!timespec64_valid(&tu64)) return -EINVAL; + current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; current->restart_block.nanosleep.rmtp = rmtp; return hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC); } +#ifdef CONFIG_COMPAT + +COMPAT_SYSCALL_DEFINE2(nanosleep, struct compat_timespec __user *, rqtp, + struct compat_timespec __user *, rmtp) +{ + struct timespec64 tu64; + struct timespec tu; + + if (compat_get_timespec(&tu, rqtp)) + return -EFAULT; + + tu64 = timespec_to_timespec64(tu); + if (!timespec64_valid(&tu64)) + return -EINVAL; + + current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; + current->restart_block.nanosleep.compat_rmtp = rmtp; + return hrtimer_nanosleep(&tu64, HRTIMER_MODE_REL, CLOCK_MONOTONIC); +} +#endif + /* * Functions related to boot-time initialization: */ diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index ec6258c9cde5..1563ca22cf1f 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -12,6 +12,7 @@ #include #include #include +#include #include "posix-timers.h" @@ -1243,10 +1244,9 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, timer.it_process = current; if (!error) { static struct itimerspec64 zero_it; - struct restart_block *restart = ¤t->restart_block; - struct timespec __user *rmtp; + struct restart_block *restart; - memset(&it, 0, sizeof it); + memset(&it, 0, sizeof(it)); it.it_value = *rqtp; spin_lock_irq(&timer.it_lock); @@ -1311,12 +1311,20 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, /* * Report back to the user the time still remaining. */ - rmtp = restart->nanosleep.rmtp; - if (rmtp) { + restart = ¤t->restart_block; + if (restart->nanosleep.type != TT_NONE) { struct timespec ts; ts = timespec64_to_timespec(it.it_value); - if (copy_to_user(rmtp, &ts, sizeof(*rmtp))) +#ifdef CONFIG_COMPAT + if (restart->nanosleep.type == TT_COMPAT) { + if (compat_put_timespec(&ts, + restart->nanosleep.compat_rmtp)) + return -EFAULT; + } else +#endif + if (copy_to_user(restart->nanosleep.rmtp, &ts, + sizeof(ts))) return -EFAULT; } restart->nanosleep.expires = timespec64_to_ns(rqtp); diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index 156a5e6f3bd2..749b76f2d757 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -17,6 +17,7 @@ #include #include #include +#include asmlinkage long sys_ni_posix_timers(void) { @@ -110,25 +111,53 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, case CLOCK_REALTIME: case CLOCK_MONOTONIC: case CLOCK_BOOTTIME: - if (copy_from_user(&t, rqtp, sizeof (struct timespec))) - return -EFAULT; - t64 = timespec_to_timespec64(t); - if (!timespec64_valid(&t64)) - return -EINVAL; - if (flags & TIMER_ABSTIME) - rmtp = NULL; - current->restart_block.nanosleep.rmtp = rmtp; - return hrtimer_nanosleep(&t64, flags & TIMER_ABSTIME ? - HRTIMER_MODE_ABS : HRTIMER_MODE_REL, - which_clock); + break; default: return -EINVAL; } + + if (copy_from_user(&t, rqtp, sizeof (struct timespec))) + return -EFAULT; + t64 = timespec_to_timespec64(t); + if (!timespec64_valid(&t64)) + return -EINVAL; + if (flags & TIMER_ABSTIME) + rmtp = NULL; + current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; + current->restart_block.nanosleep.rmtp = rmtp; + return hrtimer_nanosleep(&t64, flags & TIMER_ABSTIME ? + HRTIMER_MODE_ABS : HRTIMER_MODE_REL, + which_clock); } #ifdef CONFIG_COMPAT -long clock_nanosleep_restart(struct restart_block *restart_block) +COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags, + struct compat_timespec __user *, rqtp, + struct compat_timespec __user *, rmtp) { - return hrtimer_nanosleep_restart(restart_block); + struct timespec64 t64; + struct timespec t; + + switch (which_clock) { + case CLOCK_REALTIME: + case CLOCK_MONOTONIC: + case CLOCK_BOOTTIME: + break; + default: + return -EINVAL; + } + + if (compat_get_timespec(&t, rqtp)) + return -EFAULT; + t64 = timespec_to_timespec64(t); + if (!timespec64_valid(&t64)) + return -EINVAL; + if (flags & TIMER_ABSTIME) + rmtp = NULL; + current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; + current->restart_block.nanosleep.compat_rmtp = rmtp; + return hrtimer_nanosleep(&t64, flags & TIMER_ABSTIME ? + HRTIMER_MODE_ABS : HRTIMER_MODE_REL, + which_clock); } #endif diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index a3e5c01b430e..bec86b6b9814 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -49,6 +49,7 @@ #include #include #include +#include #include "timekeeping.h" #include "posix-timers.h" @@ -1069,25 +1070,40 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, return -EINVAL; if (flags & TIMER_ABSTIME) rmtp = NULL; + current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; current->restart_block.nanosleep.rmtp = rmtp; return kc->nsleep(which_clock, flags, &t64); } -/* - * This will restart clock_nanosleep. This is required only by - * compat_clock_nanosleep_restart for now. - */ -long clock_nanosleep_restart(struct restart_block *restart_block) +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags, + struct compat_timespec __user *, rqtp, + struct compat_timespec __user *, rmtp) { - clockid_t which_clock = restart_block->nanosleep.clockid; const struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec64 t64; + struct timespec t; - if (WARN_ON_ONCE(!kc || !kc->nsleep_restart)) + if (!kc) return -EINVAL; + if (!kc->nsleep) + return -ENANOSLEEP_NOTSUP; + + if (compat_get_timespec(&t, rqtp)) + return -EFAULT; - return kc->nsleep_restart(restart_block); + t64 = timespec_to_timespec64(t); + if (!timespec64_valid(&t64)) + return -EINVAL; + if (flags & TIMER_ABSTIME) + rmtp = NULL; + current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; + current->restart_block.nanosleep.compat_rmtp = rmtp; + + return kc->nsleep(which_clock, flags, &t64); } +#endif static const struct k_clock clock_realtime = { .clock_getres = posix_get_hrtimer_res, -- cgit v1.2.3-58-ga151 From ce41aaf47af3d28c4c958e07675a3e0a51f09bd3 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:32 +0100 Subject: hrtimers/posix-timers: Merge nanosleep timespec copyout logics into a new helper Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-7-viro@ZenIV.linux.org.uk --- include/linux/hrtimer.h | 2 ++ kernel/time/alarmtimer.c | 10 +--------- kernel/time/hrtimer.c | 29 ++++++++++++++++++++--------- kernel/time/posix-cpu-timers.c | 13 ++----------- 4 files changed, 25 insertions(+), 29 deletions(-) diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index b80c34f6fd4b..38b968f3df4e 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -452,6 +452,8 @@ static inline u64 hrtimer_forward_now(struct hrtimer *timer, } /* Precise sleep: */ + +extern int nanosleep_copyout(struct restart_block *, struct timespec *); extern long hrtimer_nanosleep(struct timespec64 *rqtp, const enum hrtimer_mode mode, const clockid_t clockid); diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 57bcf94ee132..7bed4e44f9bd 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -721,15 +721,7 @@ static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp, return 0; rmt = ktime_to_timespec(rem); -#ifdef CONFIG_COMPAT - if (restart->nanosleep.type == TT_COMPAT) { - if (compat_put_timespec(&rmt, - restart->nanosleep.compat_rmtp)) - return -EFAULT; - } else -#endif - if (copy_to_user(restart->nanosleep.rmtp, &rmt, sizeof(rmt))) - return -EFAULT; + return nanosleep_copyout(restart, &rmt); } return -ERESTART_RESTARTBLOCK; } diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 5370da8fc0a4..db2f5f7b4ba5 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1440,6 +1440,25 @@ void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *task) } EXPORT_SYMBOL_GPL(hrtimer_init_sleeper); +int nanosleep_copyout(struct restart_block *restart, struct timespec *ts) +{ + switch(restart->nanosleep.type) { +#ifdef CONFIG_COMPAT + case TT_COMPAT: + if (compat_put_timespec(ts, restart->nanosleep.compat_rmtp)) + return -EFAULT; + break; +#endif + case TT_NATIVE: + if (copy_to_user(restart->nanosleep.rmtp, ts, sizeof(struct timespec))) + return -EFAULT; + break; + default: + BUG(); + } + return -ERESTART_RESTARTBLOCK; +} + static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mode) { struct restart_block *restart; @@ -1472,15 +1491,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod return 0; rmt = ktime_to_timespec(rem); -#ifdef CONFIG_COMPAT - if (restart->nanosleep.type == TT_COMPAT) { - if (compat_put_timespec(&rmt, - restart->nanosleep.compat_rmtp)) - return -EFAULT; - } else -#endif - if (copy_to_user(restart->nanosleep.rmtp, &rmt, sizeof(rmt))) - return -EFAULT; + return nanosleep_copyout(restart, &rmt); } return -ERESTART_RESTARTBLOCK; } diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 1563ca22cf1f..993a924d1399 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1312,22 +1312,13 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, * Report back to the user the time still remaining. */ restart = ¤t->restart_block; + restart->nanosleep.expires = timespec64_to_ns(rqtp); if (restart->nanosleep.type != TT_NONE) { struct timespec ts; ts = timespec64_to_timespec(it.it_value); -#ifdef CONFIG_COMPAT - if (restart->nanosleep.type == TT_COMPAT) { - if (compat_put_timespec(&ts, - restart->nanosleep.compat_rmtp)) - return -EFAULT; - } else -#endif - if (copy_to_user(restart->nanosleep.rmtp, &ts, - sizeof(ts))) - return -EFAULT; + error = nanosleep_copyout(restart, &ts); } - restart->nanosleep.expires = timespec64_to_ns(rqtp); } return error; -- cgit v1.2.3-58-ga151 From fb923c4a3c2ee735755d4a93522150fc35d0ecbd Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:33 +0100 Subject: posix-timers: Kill ->nsleep_restart() No more users. Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-8-viro@ZenIV.linux.org.uk --- include/linux/hrtimer.h | 1 - kernel/time/hrtimer.c | 2 +- kernel/time/posix-cpu-timers.c | 6 ------ kernel/time/posix-timers.c | 4 ---- kernel/time/posix-timers.h | 1 - 5 files changed, 1 insertion(+), 13 deletions(-) diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 38b968f3df4e..d83b7ed1cb0e 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -457,7 +457,6 @@ extern int nanosleep_copyout(struct restart_block *, struct timespec *); extern long hrtimer_nanosleep(struct timespec64 *rqtp, const enum hrtimer_mode mode, const clockid_t clockid); -extern long hrtimer_nanosleep_restart(struct restart_block *restart_block); extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, struct task_struct *tsk); diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index db2f5f7b4ba5..45f83cc7c0c7 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1496,7 +1496,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod return -ERESTART_RESTARTBLOCK; } -long __sched hrtimer_nanosleep_restart(struct restart_block *restart) +static long __sched hrtimer_nanosleep_restart(struct restart_block *restart) { struct hrtimer_sleeper t; int ret; diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 993a924d1399..515148d4eeb1 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1386,10 +1386,6 @@ static int process_cpu_nsleep(const clockid_t which_clock, int flags, { return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp); } -static long process_cpu_nsleep_restart(struct restart_block *restart_block) -{ - return -EINVAL; -} static int thread_cpu_clock_getres(const clockid_t which_clock, struct timespec64 *tp) { @@ -1412,7 +1408,6 @@ const struct k_clock clock_posix_cpu = { .clock_get = posix_cpu_clock_get, .timer_create = posix_cpu_timer_create, .nsleep = posix_cpu_nsleep, - .nsleep_restart = posix_cpu_nsleep_restart, .timer_set = posix_cpu_timer_set, .timer_del = posix_cpu_timer_del, .timer_get = posix_cpu_timer_get, @@ -1424,7 +1419,6 @@ const struct k_clock clock_process = { .clock_get = process_cpu_clock_get, .timer_create = process_cpu_timer_create, .nsleep = process_cpu_nsleep, - .nsleep_restart = process_cpu_nsleep_restart, }; const struct k_clock clock_thread = { diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index bec86b6b9814..ea4a463436bf 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1111,7 +1111,6 @@ static const struct k_clock clock_realtime = { .clock_set = posix_clock_realtime_set, .clock_adj = posix_clock_realtime_adj, .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, .timer_create = common_timer_create, .timer_set = common_timer_set, .timer_get = common_timer_get, @@ -1127,7 +1126,6 @@ static const struct k_clock clock_monotonic = { .clock_getres = posix_get_hrtimer_res, .clock_get = posix_ktime_get_ts, .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, .timer_create = common_timer_create, .timer_set = common_timer_set, .timer_get = common_timer_get, @@ -1158,7 +1156,6 @@ static const struct k_clock clock_tai = { .clock_getres = posix_get_hrtimer_res, .clock_get = posix_get_tai, .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, .timer_create = common_timer_create, .timer_set = common_timer_set, .timer_get = common_timer_get, @@ -1174,7 +1171,6 @@ static const struct k_clock clock_boottime = { .clock_getres = posix_get_hrtimer_res, .clock_get = posix_get_boottime, .nsleep = common_nsleep, - .nsleep_restart = hrtimer_nanosleep_restart, .timer_create = common_timer_create, .timer_set = common_timer_set, .timer_get = common_timer_get, diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h index bfd9e15c6ce0..5e69bb85629f 100644 --- a/kernel/time/posix-timers.h +++ b/kernel/time/posix-timers.h @@ -11,7 +11,6 @@ struct k_clock { int (*timer_create)(struct k_itimer *timer); int (*nsleep)(const clockid_t which_clock, int flags, struct timespec64 *); - long (*nsleep_restart)(struct restart_block *restart_block); int (*timer_set)(struct k_itimer *timr, int flags, struct itimerspec64 *new_setting, struct itimerspec64 *old_setting); -- cgit v1.2.3-58-ga151 From 3a4d44b6162555070194e486ff6b3799a8d323a2 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:34 +0100 Subject: ntp: Move adjtimex related compat syscalls to native counterparts Get rid of set_fs() mess and sanitize compat_{get,put}_timex(), while we are at it. Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-9-viro@ZenIV.linux.org.uk --- include/linux/compat.h | 4 ++ kernel/compat.c | 141 +++++++++++++++++---------------------------- kernel/time/posix-stubs.c | 2 + kernel/time/posix-timers.c | 27 +++++++++ kernel/time/time.c | 24 +++++++- 5 files changed, 108 insertions(+), 90 deletions(-) diff --git a/include/linux/compat.h b/include/linux/compat.h index 1c5f3152cbb5..ecb8dd261d36 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -128,6 +128,10 @@ struct compat_timex { compat_int_t:32; compat_int_t:32; compat_int_t:32; }; +struct timex; +int compat_get_timex(struct timex *, const struct compat_timex __user *); +int compat_put_timex(struct compat_timex __user *, const struct timex *); + #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) typedef struct { diff --git a/kernel/compat.c b/kernel/compat.c index 23afa26f574b..97087b333543 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -30,60 +30,64 @@ #include -static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp) +int compat_get_timex(struct timex *txc, const struct compat_timex __user *utp) { - memset(txc, 0, sizeof(struct timex)); - - if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || - __get_user(txc->modes, &utp->modes) || - __get_user(txc->offset, &utp->offset) || - __get_user(txc->freq, &utp->freq) || - __get_user(txc->maxerror, &utp->maxerror) || - __get_user(txc->esterror, &utp->esterror) || - __get_user(txc->status, &utp->status) || - __get_user(txc->constant, &utp->constant) || - __get_user(txc->precision, &utp->precision) || - __get_user(txc->tolerance, &utp->tolerance) || - __get_user(txc->time.tv_sec, &utp->time.tv_sec) || - __get_user(txc->time.tv_usec, &utp->time.tv_usec) || - __get_user(txc->tick, &utp->tick) || - __get_user(txc->ppsfreq, &utp->ppsfreq) || - __get_user(txc->jitter, &utp->jitter) || - __get_user(txc->shift, &utp->shift) || - __get_user(txc->stabil, &utp->stabil) || - __get_user(txc->jitcnt, &utp->jitcnt) || - __get_user(txc->calcnt, &utp->calcnt) || - __get_user(txc->errcnt, &utp->errcnt) || - __get_user(txc->stbcnt, &utp->stbcnt)) + struct compat_timex tx32; + + if (copy_from_user(&tx32, utp, sizeof(struct compat_timex))) return -EFAULT; + txc->modes = tx32.modes; + txc->offset = tx32.offset; + txc->freq = tx32.freq; + txc->maxerror = tx32.maxerror; + txc->esterror = tx32.esterror; + txc->status = tx32.status; + txc->constant = tx32.constant; + txc->precision = tx32.precision; + txc->tolerance = tx32.tolerance; + txc->time.tv_sec = tx32.time.tv_sec; + txc->time.tv_usec = tx32.time.tv_usec; + txc->tick = tx32.tick; + txc->ppsfreq = tx32.ppsfreq; + txc->jitter = tx32.jitter; + txc->shift = tx32.shift; + txc->stabil = tx32.stabil; + txc->jitcnt = tx32.jitcnt; + txc->calcnt = tx32.calcnt; + txc->errcnt = tx32.errcnt; + txc->stbcnt = tx32.stbcnt; + return 0; } -static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc) -{ - if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || - __put_user(txc->modes, &utp->modes) || - __put_user(txc->offset, &utp->offset) || - __put_user(txc->freq, &utp->freq) || - __put_user(txc->maxerror, &utp->maxerror) || - __put_user(txc->esterror, &utp->esterror) || - __put_user(txc->status, &utp->status) || - __put_user(txc->constant, &utp->constant) || - __put_user(txc->precision, &utp->precision) || - __put_user(txc->tolerance, &utp->tolerance) || - __put_user(txc->time.tv_sec, &utp->time.tv_sec) || - __put_user(txc->time.tv_usec, &utp->time.tv_usec) || - __put_user(txc->tick, &utp->tick) || - __put_user(txc->ppsfreq, &utp->ppsfreq) || - __put_user(txc->jitter, &utp->jitter) || - __put_user(txc->shift, &utp->shift) || - __put_user(txc->stabil, &utp->stabil) || - __put_user(txc->jitcnt, &utp->jitcnt) || - __put_user(txc->calcnt, &utp->calcnt) || - __put_user(txc->errcnt, &utp->errcnt) || - __put_user(txc->stbcnt, &utp->stbcnt) || - __put_user(txc->tai, &utp->tai)) +int compat_put_timex(struct compat_timex __user *utp, const struct timex *txc) +{ + struct compat_timex tx32; + + memset(&tx32, 0, sizeof(struct compat_timex)); + tx32.modes = txc->modes; + tx32.offset = txc->offset; + tx32.freq = txc->freq; + tx32.maxerror = txc->maxerror; + tx32.esterror = txc->esterror; + tx32.status = txc->status; + tx32.constant = txc->constant; + tx32.precision = txc->precision; + tx32.tolerance = txc->tolerance; + tx32.time.tv_sec = txc->time.tv_sec; + tx32.time.tv_usec = txc->time.tv_usec; + tx32.tick = txc->tick; + tx32.ppsfreq = txc->ppsfreq; + tx32.jitter = txc->jitter; + tx32.shift = txc->shift; + tx32.stabil = txc->stabil; + tx32.jitcnt = txc->jitcnt; + tx32.calcnt = txc->calcnt; + tx32.errcnt = txc->errcnt; + tx32.stbcnt = txc->stbcnt; + tx32.tai = txc->tai; + if (copy_to_user(utp, &tx32, sizeof(struct compat_timex))) return -EFAULT; return 0; } @@ -705,29 +709,6 @@ COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock, return err; } -COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock, - struct compat_timex __user *, utp) -{ - struct timex txc; - mm_segment_t oldfs; - int err, ret; - - err = compat_get_timex(&txc, utp); - if (err) - return err; - - oldfs = get_fs(); - set_fs(KERNEL_DS); - ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc); - set_fs(oldfs); - - err = compat_put_timex(utp, &txc); - if (err) - return err; - - return ret; -} - COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock, struct compat_timespec __user *, tp) { @@ -944,24 +925,6 @@ COMPAT_SYSCALL_DEFINE1(stime, compat_time_t __user *, tptr) #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ -COMPAT_SYSCALL_DEFINE1(adjtimex, struct compat_timex __user *, utp) -{ - struct timex txc; - int err, ret; - - err = compat_get_timex(&txc, utp); - if (err) - return err; - - ret = do_adjtimex(&txc); - - err = compat_put_timex(utp, &txc); - if (err) - return err; - - return ret; -} - #ifdef CONFIG_NUMA COMPAT_SYSCALL_DEFINE6(move_pages, pid_t, pid, compat_ulong_t, nr_pages, compat_uptr_t __user *, pages32, diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index 749b76f2d757..954d1d8ff9e6 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -28,6 +28,7 @@ asmlinkage long sys_ni_posix_timers(void) } #define SYS_NI(name) SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers) +#define COMPAT_SYS_NI(name) SYSCALL_ALIAS(compat_sys_##name, sys_ni_posix_timers) SYS_NI(timer_create); SYS_NI(timer_gettime); @@ -40,6 +41,7 @@ SYS_NI(setitimer); #ifdef __ARCH_WANT_SYS_ALARM SYS_NI(alarm); #endif +COMPAT_SYS_NI(clock_adjtime); /* * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index ea4a463436bf..b1b6d52d6425 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1018,6 +1018,33 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, return err; } +#ifdef CONFIG_COMPAT + +COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock, + struct compat_timex __user *, utp) +{ + const struct k_clock *kc = clockid_to_kclock(which_clock); + struct timex ktx; + int err; + + if (!kc) + return -EINVAL; + if (!kc->clock_adj) + return -EOPNOTSUPP; + + err = compat_get_timex(&ktx, utp); + if (err) + return err; + + err = kc->clock_adj(which_clock, &ktx); + + if (err >= 0) + err = compat_put_timex(utp, &ktx); + + return err; +} +#endif + SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct timespec __user *, tp) { diff --git a/kernel/time/time.c b/kernel/time/time.c index 49c73c6ed648..400662f16c5a 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -39,6 +39,7 @@ #include #include +#include #include #include @@ -224,12 +225,33 @@ SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p) * structure. But bear in mind that the structures * may change */ - if(copy_from_user(&txc, txc_p, sizeof(struct timex))) + if (copy_from_user(&txc, txc_p, sizeof(struct timex))) return -EFAULT; ret = do_adjtimex(&txc); return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret; } +#ifdef CONFIG_COMPAT + +COMPAT_SYSCALL_DEFINE1(adjtimex, struct compat_timex __user *, utp) +{ + struct timex txc; + int err, ret; + + err = compat_get_timex(&txc, utp); + if (err) + return err; + + ret = do_adjtimex(&txc); + + err = compat_put_timex(utp, &txc); + if (err) + return err; + + return ret; +} +#endif + /* * Convert jiffies to milliseconds and back. * -- cgit v1.2.3-58-ga151 From 1acbe7708b0313b33287bb4ffcbf26462ea3c588 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:35 +0100 Subject: posix-timers: Take compat timer_settime(2) to native one ... and get rid of set_fs() in there Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-10-viro@ZenIV.linux.org.uk --- kernel/compat.c | 23 ------------ kernel/time/posix-stubs.c | 1 + kernel/time/posix-timers.c | 87 +++++++++++++++++++++++++++++++++------------- 3 files changed, 64 insertions(+), 47 deletions(-) diff --git a/kernel/compat.c b/kernel/compat.c index 97087b333543..df39e2e00c47 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -635,29 +635,6 @@ COMPAT_SYSCALL_DEFINE3(timer_create, clockid_t, which_clock, return sys_timer_create(which_clock, event, created_timer_id); } -COMPAT_SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, - struct compat_itimerspec __user *, new, - struct compat_itimerspec __user *, old) -{ - long err; - mm_segment_t oldfs; - struct itimerspec newts, oldts; - - if (!new) - return -EINVAL; - if (get_compat_itimerspec(&newts, new)) - return -EFAULT; - oldfs = get_fs(); - set_fs(KERNEL_DS); - err = sys_timer_settime(timer_id, flags, - (struct itimerspec __user *) &newts, - (struct itimerspec __user *) &oldts); - set_fs(oldfs); - if (!err && old && put_compat_itimerspec(old, &oldts)) - return -EFAULT; - return err; -} - COMPAT_SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, struct compat_itimerspec __user *, setting) { diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index 954d1d8ff9e6..ad263df132d6 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -42,6 +42,7 @@ SYS_NI(setitimer); SYS_NI(alarm); #endif COMPAT_SYS_NI(clock_adjtime); +COMPAT_SYS_NI(timer_settime); /* * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index b1b6d52d6425..a73feac191f9 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -819,31 +819,21 @@ int common_timer_set(struct k_itimer *timr, int flags, return 0; } -/* Set a POSIX.1b interval timer */ -SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, - const struct itimerspec __user *, new_setting, - struct itimerspec __user *, old_setting) +static int do_timer_settime(timer_t timer_id, int flags, + struct itimerspec64 *new_spec64, + struct itimerspec64 *old_spec64) { - struct itimerspec64 new_spec64, old_spec64; - struct itimerspec64 *rtn = old_setting ? &old_spec64 : NULL; - struct itimerspec new_spec, old_spec; + const struct k_clock *kc; struct k_itimer *timr; unsigned long flag; - const struct k_clock *kc; int error = 0; - if (!new_setting) + if (!timespec64_valid(&new_spec64->it_interval) || + !timespec64_valid(&new_spec64->it_value)) return -EINVAL; - if (copy_from_user(&new_spec, new_setting, sizeof (new_spec))) - return -EFAULT; - new_spec64 = itimerspec_to_itimerspec64(&new_spec); - - if (!timespec64_valid(&new_spec64.it_interval) || - !timespec64_valid(&new_spec64.it_value)) - return -EINVAL; - if (rtn) - memset(rtn, 0, sizeof(*rtn)); + if (old_spec64) + memset(old_spec64, 0, sizeof(*old_spec64)); retry: timr = lock_timer(timer_id, &flag); if (!timr) @@ -853,22 +843,71 @@ retry: if (WARN_ON_ONCE(!kc || !kc->timer_set)) error = -EINVAL; else - error = kc->timer_set(timr, flags, &new_spec64, rtn); + error = kc->timer_set(timr, flags, new_spec64, old_spec64); unlock_timer(timr, flag); if (error == TIMER_RETRY) { - rtn = NULL; // We already got the old time... + old_spec64 = NULL; // We already got the old time... goto retry; } - old_spec = itimerspec64_to_itimerspec(&old_spec64); - if (old_setting && !error && - copy_to_user(old_setting, &old_spec, sizeof (old_spec))) - error = -EFAULT; + return error; +} + +/* Set a POSIX.1b interval timer */ +SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, + const struct itimerspec __user *, new_setting, + struct itimerspec __user *, old_setting) +{ + struct itimerspec64 new_spec64, old_spec64; + struct itimerspec64 *rtn = old_setting ? &old_spec64 : NULL; + struct itimerspec new_spec; + int error = 0; + + if (!new_setting) + return -EINVAL; + if (copy_from_user(&new_spec, new_setting, sizeof (new_spec))) + return -EFAULT; + new_spec64 = itimerspec_to_itimerspec64(&new_spec); + + error = do_timer_settime(timer_id, flags, &new_spec64, rtn); + if (!error && old_setting) { + struct itimerspec old_spec; + old_spec = itimerspec64_to_itimerspec(&old_spec64); + if (copy_to_user(old_setting, &old_spec, sizeof (old_spec))) + error = -EFAULT; + } return error; } +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags, + struct compat_itimerspec __user *, new, + struct compat_itimerspec __user *, old) +{ + struct itimerspec64 new_spec64, old_spec64; + struct itimerspec64 *rtn = old ? &old_spec64 : NULL; + struct itimerspec new_spec; + int error = 0; + + if (!new) + return -EINVAL; + if (get_compat_itimerspec(&new_spec, new)) + return -EFAULT; + + new_spec64 = itimerspec_to_itimerspec64(&new_spec); + error = do_timer_settime(timer_id, flags, &new_spec64, rtn); + if (!error && old) { + struct itimerspec old_spec; + old_spec = itimerspec64_to_itimerspec(&old_spec64); + if (put_compat_itimerspec(old, &old_spec)) + error = -EFAULT; + } + return error; +} +#endif + int common_timer_del(struct k_itimer *timer) { const struct k_clock *kc = timer->kclock; -- cgit v1.2.3-58-ga151 From b0dc12426ec404de99d7e75a12a22d9201d90914 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:36 +0100 Subject: posix-timers: Take compat timer_gettime(2) to native one ... and get rid of set_fs() in there Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-11-viro@ZenIV.linux.org.uk --- kernel/compat.c | 17 ----------------- kernel/time/posix-stubs.c | 1 + kernel/time/posix-timers.c | 43 ++++++++++++++++++++++++++++++++++--------- 3 files changed, 35 insertions(+), 26 deletions(-) diff --git a/kernel/compat.c b/kernel/compat.c index df39e2e00c47..1fb8cf7e691e 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -635,23 +635,6 @@ COMPAT_SYSCALL_DEFINE3(timer_create, clockid_t, which_clock, return sys_timer_create(which_clock, event, created_timer_id); } -COMPAT_SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, - struct compat_itimerspec __user *, setting) -{ - long err; - mm_segment_t oldfs; - struct itimerspec ts; - - oldfs = get_fs(); - set_fs(KERNEL_DS); - err = sys_timer_gettime(timer_id, - (struct itimerspec __user *) &ts); - set_fs(oldfs); - if (!err && put_compat_itimerspec(setting, &ts)) - return -EFAULT; - return err; -} - COMPAT_SYSCALL_DEFINE2(clock_settime, clockid_t, which_clock, struct compat_timespec __user *, tp) { diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index ad263df132d6..f4a1962d1729 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -43,6 +43,7 @@ SYS_NI(alarm); #endif COMPAT_SYS_NI(clock_adjtime); COMPAT_SYS_NI(timer_settime); +COMPAT_SYS_NI(timer_gettime); /* * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index a73feac191f9..e82bb1fd614e 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -690,11 +690,8 @@ void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting) } /* Get the time remaining on a POSIX.1b interval timer. */ -SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, - struct itimerspec __user *, setting) +static int do_timer_gettime(timer_t timer_id, struct itimerspec64 *setting) { - struct itimerspec64 cur_setting64; - struct itimerspec cur_setting; struct k_itimer *timr; const struct k_clock *kc; unsigned long flags; @@ -704,21 +701,49 @@ SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, if (!timr) return -EINVAL; - memset(&cur_setting64, 0, sizeof(cur_setting64)); + memset(setting, 0, sizeof(*setting)); kc = timr->kclock; if (WARN_ON_ONCE(!kc || !kc->timer_get)) ret = -EINVAL; else - kc->timer_get(timr, &cur_setting64); + kc->timer_get(timr, setting); unlock_timer(timr, flags); + return ret; +} - cur_setting = itimerspec64_to_itimerspec(&cur_setting64); - if (!ret && copy_to_user(setting, &cur_setting, sizeof (cur_setting))) - return -EFAULT; +/* Get the time remaining on a POSIX.1b interval timer. */ +SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, + struct itimerspec __user *, setting) +{ + struct itimerspec64 cur_setting64; + int ret = do_timer_gettime(timer_id, &cur_setting64); + if (!ret) { + struct itimerspec cur_setting; + cur_setting = itimerspec64_to_itimerspec(&cur_setting64); + if (copy_to_user(setting, &cur_setting, sizeof (cur_setting))) + ret = -EFAULT; + } + return ret; +} + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id, + struct compat_itimerspec __user *, setting) +{ + struct itimerspec64 cur_setting64; + + int ret = do_timer_gettime(timer_id, &cur_setting64); + if (!ret) { + struct itimerspec cur_setting; + cur_setting = itimerspec64_to_itimerspec(&cur_setting64); + if (put_compat_itimerspec(setting, &cur_setting)) + ret = -EFAULT; + } return ret; } +#endif /* * Get the number of overruns of a POSIX.1b interval timer. This is to -- cgit v1.2.3-58-ga151 From 54ad9c46c262ce4a603dc7887e37956896a0211d Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:37 +0100 Subject: itimers: Move compat itimer syscalls to native ones get rid of set_fs(), sanitize compat copyin/copyout. Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-12-viro@ZenIV.linux.org.uk --- include/linux/compat.h | 4 +++ kernel/compat.c | 69 +++++++++++------------------------------------ kernel/time/itimer.c | 38 ++++++++++++++++++++++++++ kernel/time/posix-stubs.c | 2 ++ 4 files changed, 60 insertions(+), 53 deletions(-) diff --git a/include/linux/compat.h b/include/linux/compat.h index ecb8dd261d36..425563c7647b 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -94,6 +94,10 @@ struct compat_itimerval { struct compat_timeval it_value; }; +struct itimerval; +int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *); +int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *); + struct compat_tms { compat_clock_t tms_utime; compat_clock_t tms_stime; diff --git a/kernel/compat.c b/kernel/compat.c index 1fb8cf7e691e..c349417d2c40 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -217,65 +217,28 @@ int compat_convert_timespec(struct timespec __user **kts, return 0; } -static inline long get_compat_itimerval(struct itimerval *o, - struct compat_itimerval __user *i) +int get_compat_itimerval(struct itimerval *o, const struct compat_itimerval __user *i) { - return (!access_ok(VERIFY_READ, i, sizeof(*i)) || - (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | - __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | - __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | - __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); -} - -static inline long put_compat_itimerval(struct compat_itimerval __user *o, - struct itimerval *i) -{ - return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || - (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | - __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | - __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | - __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); -} - -asmlinkage long sys_ni_posix_timers(void); - -COMPAT_SYSCALL_DEFINE2(getitimer, int, which, - struct compat_itimerval __user *, it) -{ - struct itimerval kit; - int error; - - if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) - return sys_ni_posix_timers(); + struct compat_itimerval v32; - error = do_getitimer(which, &kit); - if (!error && put_compat_itimerval(it, &kit)) - error = -EFAULT; - return error; + if (copy_from_user(&v32, i, sizeof(struct compat_itimerval))) + return -EFAULT; + o->it_interval.tv_sec = v32.it_interval.tv_sec; + o->it_interval.tv_usec = v32.it_interval.tv_usec; + o->it_value.tv_sec = v32.it_value.tv_sec; + o->it_value.tv_usec = v32.it_value.tv_usec; + return 0; } -COMPAT_SYSCALL_DEFINE3(setitimer, int, which, - struct compat_itimerval __user *, in, - struct compat_itimerval __user *, out) +int put_compat_itimerval(struct compat_itimerval __user *o, const struct itimerval *i) { - struct itimerval kin, kout; - int error; + struct compat_itimerval v32; - if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) - return sys_ni_posix_timers(); - - if (in) { - if (get_compat_itimerval(&kin, in)) - return -EFAULT; - } else - memset(&kin, 0, sizeof(kin)); - - error = do_setitimer(which, &kin, out ? &kout : NULL); - if (error || !out) - return error; - if (put_compat_itimerval(out, &kout)) - return -EFAULT; - return 0; + v32.it_interval.tv_sec = i->it_interval.tv_sec; + v32.it_interval.tv_usec = i->it_interval.tv_usec; + v32.it_value.tv_sec = i->it_value.tv_sec; + v32.it_value.tv_usec = i->it_value.tv_usec; + return copy_to_user(o, &v32, sizeof(struct compat_itimerval)) ? -EFAULT : 0; } static compat_clock_t clock_t_to_compat_clock_t(clock_t x) diff --git a/kernel/time/itimer.c b/kernel/time/itimer.c index 087d6a1279b8..9dd7ff5e445a 100644 --- a/kernel/time/itimer.c +++ b/kernel/time/itimer.c @@ -15,6 +15,7 @@ #include #include #include +#include #include @@ -116,6 +117,19 @@ SYSCALL_DEFINE2(getitimer, int, which, struct itimerval __user *, value) return error; } +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE2(getitimer, int, which, + struct compat_itimerval __user *, it) +{ + struct itimerval kit; + int error = do_getitimer(which, &kit); + + if (!error && put_compat_itimerval(it, &kit)) + error = -EFAULT; + return error; +} +#endif + /* * The timer is automagically restarted, when interval != 0 @@ -294,3 +308,27 @@ SYSCALL_DEFINE3(setitimer, int, which, struct itimerval __user *, value, return -EFAULT; return 0; } + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE3(setitimer, int, which, + struct compat_itimerval __user *, in, + struct compat_itimerval __user *, out) +{ + struct itimerval kin, kout; + int error; + + if (in) { + if (get_compat_itimerval(&kin, in)) + return -EFAULT; + } else { + memset(&kin, 0, sizeof(kin)); + } + + error = do_setitimer(which, &kin, out ? &kout : NULL); + if (error || !out) + return error; + if (put_compat_itimerval(out, &kout)) + return -EFAULT; + return 0; +} +#endif diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index f4a1962d1729..7f88517461e8 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -44,6 +44,8 @@ SYS_NI(alarm); COMPAT_SYS_NI(clock_adjtime); COMPAT_SYS_NI(timer_settime); COMPAT_SYS_NI(timer_gettime); +COMPAT_SYS_NI(getitimer); +COMPAT_SYS_NI(setitimer); /* * We preserve minimal support for CLOCK_REALTIME and CLOCK_MONOTONIC -- cgit v1.2.3-58-ga151 From d822cdcce43f9d4dcddbf9c68f9537d542ccc3c3 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:38 +0100 Subject: posix-timers: Move compat versions of clock_gettime/settime/getres Move them to the native implementations and get rid of the set_fs() hackery. Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-13-viro@ZenIV.linux.org.uk --- kernel/compat.c | 51 ----------------------------------- kernel/time/posix-stubs.c | 53 +++++++++++++++++++++++++++++++++++++ kernel/time/posix-timers.c | 66 +++++++++++++++++++++++++++++++++++++++++++--- 3 files changed, 115 insertions(+), 55 deletions(-) diff --git a/kernel/compat.c b/kernel/compat.c index c349417d2c40..582c38bfdf60 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -598,57 +598,6 @@ COMPAT_SYSCALL_DEFINE3(timer_create, clockid_t, which_clock, return sys_timer_create(which_clock, event, created_timer_id); } -COMPAT_SYSCALL_DEFINE2(clock_settime, clockid_t, which_clock, - struct compat_timespec __user *, tp) -{ - long err; - mm_segment_t oldfs; - struct timespec ts; - - if (compat_get_timespec(&ts, tp)) - return -EFAULT; - oldfs = get_fs(); - set_fs(KERNEL_DS); - err = sys_clock_settime(which_clock, - (struct timespec __user *) &ts); - set_fs(oldfs); - return err; -} - -COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock, - struct compat_timespec __user *, tp) -{ - long err; - mm_segment_t oldfs; - struct timespec ts; - - oldfs = get_fs(); - set_fs(KERNEL_DS); - err = sys_clock_gettime(which_clock, - (struct timespec __user *) &ts); - set_fs(oldfs); - if (!err && compat_put_timespec(&ts, tp)) - return -EFAULT; - return err; -} - -COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock, - struct compat_timespec __user *, tp) -{ - long err; - mm_segment_t oldfs; - struct timespec ts; - - oldfs = get_fs(); - set_fs(KERNEL_DS); - err = sys_clock_getres(which_clock, - (struct timespec __user *) &ts); - set_fs(oldfs); - if (!err && tp && compat_put_timespec(&ts, tp)) - return -EFAULT; - return err; -} - /* * We currently only need the following fields from the sigevent * structure: sigev_value, sigev_signo, sig_notify and (sometimes diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index 7f88517461e8..a375c31cb352 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -137,6 +137,59 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags, } #ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock, + struct compat_timespec __user *, tp) +{ + struct timespec64 new_tp64; + struct timespec new_tp; + + if (which_clock != CLOCK_REALTIME) + return -EINVAL; + if (compat_get_timespec(&new_tp, tp)) + return -EFAULT; + + new_tp64 = timespec_to_timespec64(new_tp); + return do_sys_settimeofday64(&new_tp64, NULL); +} + +COMPAT_SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock, + struct compat_timespec __user *,tp) +{ + struct timespec64 kernel_tp64; + struct timespec kernel_tp; + + switch (which_clock) { + case CLOCK_REALTIME: ktime_get_real_ts64(&kernel_tp64); break; + case CLOCK_MONOTONIC: ktime_get_ts64(&kernel_tp64); break; + case CLOCK_BOOTTIME: get_monotonic_boottime64(&kernel_tp64); break; + default: return -EINVAL; + } + + kernel_tp = timespec64_to_timespec(kernel_tp64); + if (compat_put_timespec(&kernel_tp, tp)) + return -EFAULT; + return 0; +} + +COMPAT_SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, + struct compat_timespec __user *, tp) +{ + struct timespec rtn_tp = { + .tv_sec = 0, + .tv_nsec = hrtimer_resolution, + }; + + switch (which_clock) { + case CLOCK_REALTIME: + case CLOCK_MONOTONIC: + case CLOCK_BOOTTIME: + if (compat_put_timespec(&rtn_tp, tp)) + return -EFAULT; + return 0; + default: + return -EINVAL; + } +} COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags, struct compat_timespec __user *, rqtp, struct compat_timespec __user *, rmtp) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index e82bb1fd614e..61a5fb91a3c7 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1082,8 +1082,66 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock, return err; } +SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, + struct timespec __user *, tp) +{ + const struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec64 rtn_tp64; + struct timespec rtn_tp; + int error; + + if (!kc) + return -EINVAL; + + error = kc->clock_getres(which_clock, &rtn_tp64); + rtn_tp = timespec64_to_timespec(rtn_tp64); + + if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) + error = -EFAULT; + + return error; +} + #ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE2(clock_settime, clockid_t, which_clock, + struct compat_timespec __user *, tp) +{ + const struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec64 new_tp64; + struct timespec new_tp; + + if (!kc || !kc->clock_set) + return -EINVAL; + + if (compat_get_timespec(&new_tp, tp)) + return -EFAULT; + + new_tp64 = timespec_to_timespec64(new_tp); + + return kc->clock_set(which_clock, &new_tp64); +} + +COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock, + struct compat_timespec __user *, tp) +{ + const struct k_clock *kc = clockid_to_kclock(which_clock); + struct timespec64 kernel_tp64; + struct timespec kernel_tp; + int error; + + if (!kc) + return -EINVAL; + + error = kc->clock_get(which_clock, &kernel_tp64); + kernel_tp = timespec64_to_timespec(kernel_tp64); + + if (!error && compat_put_timespec(&kernel_tp, tp)) + error = -EFAULT; + + return error; +} + COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock, struct compat_timex __user *, utp) { @@ -1107,10 +1165,9 @@ COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock, return err; } -#endif -SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, - struct timespec __user *, tp) +COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock, + struct compat_timespec __user *, tp) { const struct k_clock *kc = clockid_to_kclock(which_clock); struct timespec64 rtn_tp64; @@ -1123,11 +1180,12 @@ SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, error = kc->clock_getres(which_clock, &rtn_tp64); rtn_tp = timespec64_to_timespec(rtn_tp64); - if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) + if (!error && tp && compat_put_timespec(&rtn_tp, tp)) error = -EFAULT; return error; } +#endif /* * nanosleep for monotonic and realtime clocks -- cgit v1.2.3-58-ga151 From 2482097c6c0f01ad74c9b2cff120a519ac59846e Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:39 +0100 Subject: posix-timers: Move compat_timer_create() to native, get rid of set_fs() Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-14-viro@ZenIV.linux.org.uk --- kernel/compat.c | 18 -------------- kernel/time/posix-stubs.c | 1 + kernel/time/posix-timers.c | 59 ++++++++++++++++++++++++++++++++-------------- 3 files changed, 42 insertions(+), 36 deletions(-) diff --git a/kernel/compat.c b/kernel/compat.c index 582c38bfdf60..4544eb63edfa 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -580,24 +580,6 @@ int put_compat_itimerspec(struct compat_itimerspec __user *dst, return 0; } -COMPAT_SYSCALL_DEFINE3(timer_create, clockid_t, which_clock, - struct compat_sigevent __user *, timer_event_spec, - timer_t __user *, created_timer_id) -{ - struct sigevent __user *event = NULL; - - if (timer_event_spec) { - struct sigevent kevent; - - event = compat_alloc_user_space(sizeof(*event)); - if (get_compat_sigevent(&kevent, timer_event_spec) || - copy_to_user(event, &kevent, sizeof(*event))) - return -EFAULT; - } - - return sys_timer_create(which_clock, event, created_timer_id); -} - /* * We currently only need the following fields from the sigevent * structure: sigev_value, sigev_signo, sig_notify and (sometimes diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index a375c31cb352..38f3b20efa29 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -41,6 +41,7 @@ SYS_NI(setitimer); #ifdef __ARCH_WANT_SYS_ALARM SYS_NI(alarm); #endif +COMPAT_SYS_NI(timer_create); COMPAT_SYS_NI(clock_adjtime); COMPAT_SYS_NI(timer_settime); COMPAT_SYS_NI(timer_gettime); diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index 61a5fb91a3c7..c9f45a84fb8b 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -490,15 +490,12 @@ static int common_timer_create(struct k_itimer *new_timer) } /* Create a POSIX.1b interval timer. */ - -SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock, - struct sigevent __user *, timer_event_spec, - timer_t __user *, created_timer_id) +static int do_timer_create(clockid_t which_clock, struct sigevent *event, + timer_t __user *created_timer_id) { const struct k_clock *kc = clockid_to_kclock(which_clock); struct k_itimer *new_timer; int error, new_timer_id; - sigevent_t event; int it_id_set = IT_ID_NOT_SET; if (!kc) @@ -523,29 +520,25 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock, new_timer->kclock = kc; new_timer->it_overrun = -1; - if (timer_event_spec) { - if (copy_from_user(&event, timer_event_spec, sizeof (event))) { - error = -EFAULT; - goto out; - } + if (event) { rcu_read_lock(); - new_timer->it_pid = get_pid(good_sigevent(&event)); + new_timer->it_pid = get_pid(good_sigevent(event)); rcu_read_unlock(); if (!new_timer->it_pid) { error = -EINVAL; goto out; } + new_timer->it_sigev_notify = event->sigev_notify; + new_timer->sigq->info.si_signo = event->sigev_signo; + new_timer->sigq->info.si_value = event->sigev_value; } else { - memset(&event.sigev_value, 0, sizeof(event.sigev_value)); - event.sigev_notify = SIGEV_SIGNAL; - event.sigev_signo = SIGALRM; - event.sigev_value.sival_int = new_timer->it_id; + new_timer->it_sigev_notify = SIGEV_SIGNAL; + new_timer->sigq->info.si_signo = SIGALRM; + memset(&new_timer->sigq->info.si_value, 0, sizeof(sigval_t)); + new_timer->sigq->info.si_value.sival_int = new_timer->it_id; new_timer->it_pid = get_pid(task_tgid(current)); } - new_timer->it_sigev_notify = event.sigev_notify; - new_timer->sigq->info.si_signo = event.sigev_signo; - new_timer->sigq->info.si_value = event.sigev_value; new_timer->sigq->info.si_tid = new_timer->it_id; new_timer->sigq->info.si_code = SI_TIMER; @@ -576,6 +569,36 @@ out: return error; } +SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock, + struct sigevent __user *, timer_event_spec, + timer_t __user *, created_timer_id) +{ + if (timer_event_spec) { + sigevent_t event; + + if (copy_from_user(&event, timer_event_spec, sizeof (event))) + return -EFAULT; + return do_timer_create(which_clock, &event, created_timer_id); + } + return do_timer_create(which_clock, NULL, created_timer_id); +} + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE3(timer_create, clockid_t, which_clock, + struct compat_sigevent __user *, timer_event_spec, + timer_t __user *, created_timer_id) +{ + if (timer_event_spec) { + sigevent_t event; + + if (get_compat_sigevent(&event, timer_event_spec)) + return -EFAULT; + return do_timer_create(which_clock, &event, created_timer_id); + } + return do_timer_create(which_clock, NULL, created_timer_id); +} +#endif + /* * Locking issues: We need to protect the result of the id look up until * we get the timer locked down so it is not deleted under us. The -- cgit v1.2.3-58-ga151 From b180db2c8ca6692a10b79631cadc18d03303d494 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:40 +0100 Subject: time: Move compat_time()/stime() to native Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-15-viro@ZenIV.linux.org.uk --- kernel/compat.c | 40 ---------------------------------------- kernel/time/time.c | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 41 insertions(+), 40 deletions(-) diff --git a/kernel/compat.c b/kernel/compat.c index 4544eb63edfa..aa7b9a27f9e7 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -739,46 +739,6 @@ COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese, return ret; } -#ifdef __ARCH_WANT_COMPAT_SYS_TIME - -/* compat_time_t is a 32 bit "long" and needs to get converted. */ - -COMPAT_SYSCALL_DEFINE1(time, compat_time_t __user *, tloc) -{ - compat_time_t i; - struct timeval tv; - - do_gettimeofday(&tv); - i = tv.tv_sec; - - if (tloc) { - if (put_user(i,tloc)) - return -EFAULT; - } - force_successful_syscall_return(); - return i; -} - -COMPAT_SYSCALL_DEFINE1(stime, compat_time_t __user *, tptr) -{ - struct timespec tv; - int err; - - if (get_user(tv.tv_sec, tptr)) - return -EFAULT; - - tv.tv_nsec = 0; - - err = security_settime(&tv, NULL); - if (err) - return err; - - do_settimeofday(&tv); - return 0; -} - -#endif /* __ARCH_WANT_COMPAT_SYS_TIME */ - #ifdef CONFIG_NUMA COMPAT_SYSCALL_DEFINE6(move_pages, pid_t, pid, compat_ulong_t, nr_pages, compat_uptr_t __user *, pages32, diff --git a/kernel/time/time.c b/kernel/time/time.c index 400662f16c5a..e5d44999ff78 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -100,6 +100,47 @@ SYSCALL_DEFINE1(stime, time_t __user *, tptr) #endif /* __ARCH_WANT_SYS_TIME */ +#ifdef CONFIG_COMPAT +#ifdef __ARCH_WANT_COMPAT_SYS_TIME + +/* compat_time_t is a 32 bit "long" and needs to get converted. */ +COMPAT_SYSCALL_DEFINE1(time, compat_time_t __user *, tloc) +{ + struct timeval tv; + compat_time_t i; + + do_gettimeofday(&tv); + i = tv.tv_sec; + + if (tloc) { + if (put_user(i,tloc)) + return -EFAULT; + } + force_successful_syscall_return(); + return i; +} + +COMPAT_SYSCALL_DEFINE1(stime, compat_time_t __user *, tptr) +{ + struct timespec tv; + int err; + + if (get_user(tv.tv_sec, tptr)) + return -EFAULT; + + tv.tv_nsec = 0; + + err = security_settime(&tv, NULL); + if (err) + return err; + + do_settimeofday(&tv); + return 0; +} + +#endif /* __ARCH_WANT_COMPAT_SYS_TIME */ +#endif + SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv, struct timezone __user *, tz) { -- cgit v1.2.3-58-ga151 From 2b2d02856b3176701c91d723356f766d6ee27853 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Jun 2017 09:42:41 +0100 Subject: time: Move compat_gettimeofday()/settimeofday() to native Signed-off-by: Al Viro Signed-off-by: Thomas Gleixner Cc: John Stultz Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170607084241.28657-16-viro@ZenIV.linux.org.uk --- kernel/compat.c | 38 -------------------------------------- kernel/time/time.c | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 41 insertions(+), 38 deletions(-) diff --git a/kernel/compat.c b/kernel/compat.c index aa7b9a27f9e7..ebd8bdc3fd68 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -92,44 +92,6 @@ int compat_put_timex(struct compat_timex __user *utp, const struct timex *txc) return 0; } -COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv, - struct timezone __user *, tz) -{ - if (tv) { - struct timeval ktv; - do_gettimeofday(&ktv); - if (compat_put_timeval(&ktv, tv)) - return -EFAULT; - } - if (tz) { - if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) - return -EFAULT; - } - - return 0; -} - -COMPAT_SYSCALL_DEFINE2(settimeofday, struct compat_timeval __user *, tv, - struct timezone __user *, tz) -{ - struct timespec64 new_ts; - struct timeval user_tv; - struct timezone new_tz; - - if (tv) { - if (compat_get_timeval(&user_tv, tv)) - return -EFAULT; - new_ts.tv_sec = user_tv.tv_sec; - new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC; - } - if (tz) { - if (copy_from_user(&new_tz, tz, sizeof(*tz))) - return -EFAULT; - } - - return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL); -} - static int __compat_get_timeval(struct timeval *tv, const struct compat_timeval __user *ctv) { return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) || diff --git a/kernel/time/time.c b/kernel/time/time.c index e5d44999ff78..7c89e437c4d7 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -257,6 +257,47 @@ SYSCALL_DEFINE2(settimeofday, struct timeval __user *, tv, return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL); } +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv, + struct timezone __user *, tz) +{ + if (tv) { + struct timeval ktv; + + do_gettimeofday(&ktv); + if (compat_put_timeval(&ktv, tv)) + return -EFAULT; + } + if (tz) { + if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) + return -EFAULT; + } + + return 0; +} + +COMPAT_SYSCALL_DEFINE2(settimeofday, struct compat_timeval __user *, tv, + struct timezone __user *, tz) +{ + struct timespec64 new_ts; + struct timeval user_tv; + struct timezone new_tz; + + if (tv) { + if (compat_get_timeval(&user_tv, tv)) + return -EFAULT; + new_ts.tv_sec = user_tv.tv_sec; + new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC; + } + if (tz) { + if (copy_from_user(&new_tz, tz, sizeof(*tz))) + return -EFAULT; + } + + return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL); +} +#endif + SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p) { struct timex txc; /* Local copy of parameter */ -- cgit v1.2.3-58-ga151 From 343d8fc208e43e50525ae6e0fc4845b9966b7318 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 13 Jun 2017 23:29:14 +0200 Subject: posix-cpu-timers: Avoid timespec conversion in do_cpu_nanosleep() No point in converting the expiry time back and forth. No point either to update the value in the caller supplied variable. mark the rqtp argument const. Signed-off-by: Thomas Gleixner Cc: Al Viro Cc: John Stultz Cc: Peter Zijlstra --- kernel/time/posix-cpu-timers.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 515148d4eeb1..3adfa42ca24c 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1227,10 +1227,11 @@ void set_process_cpu_timer(struct task_struct *tsk, unsigned int clock_idx, } static int do_cpu_nanosleep(const clockid_t which_clock, int flags, - struct timespec64 *rqtp) + const struct timespec64 *rqtp) { - struct k_itimer timer; struct itimerspec64 it; + struct k_itimer timer; + u64 expires; int error; /* @@ -1279,7 +1280,7 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, /* * We were interrupted by a signal. */ - *rqtp = ns_to_timespec64(timer.it.cpu.expires); + expires = timer.it.cpu.expires; error = posix_cpu_timer_set(&timer, 0, &zero_it, &it); if (!error) { /* @@ -1312,7 +1313,7 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, * Report back to the user the time still remaining. */ restart = ¤t->restart_block; - restart->nanosleep.expires = timespec64_to_ns(rqtp); + restart->nanosleep.expires = expires; if (restart->nanosleep.type != TT_NONE) { struct timespec ts; -- cgit v1.2.3-58-ga151 From 938e7cf2d569833a5acf689a8926faf507826253 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 13 Jun 2017 23:34:33 +0200 Subject: posix-timers: Make nanosleep timespec argument const No nanosleep implementation modifies the rqtp argument. Mark is const. Signed-off-by: Thomas Gleixner Cc: Al Viro Cc: John Stultz Cc: Peter Zijlstra --- include/linux/hrtimer.h | 2 +- kernel/time/alarmtimer.c | 2 +- kernel/time/hrtimer.c | 2 +- kernel/time/posix-cpu-timers.c | 4 ++-- kernel/time/posix-timers.c | 4 ++-- kernel/time/posix-timers.h | 2 +- 6 files changed, 8 insertions(+), 8 deletions(-) diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index d83b7ed1cb0e..255edd5e7a74 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -454,7 +454,7 @@ static inline u64 hrtimer_forward_now(struct hrtimer *timer, /* Precise sleep: */ extern int nanosleep_copyout(struct restart_block *, struct timespec *); -extern long hrtimer_nanosleep(struct timespec64 *rqtp, +extern long hrtimer_nanosleep(const struct timespec64 *rqtp, const enum hrtimer_mode mode, const clockid_t clockid); diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 7bed4e44f9bd..c991cf212c6d 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -753,7 +753,7 @@ static long __sched alarm_timer_nsleep_restart(struct restart_block *restart) * Handles clock_nanosleep calls against _ALARM clockids */ static int alarm_timer_nsleep(const clockid_t which_clock, int flags, - struct timespec64 *tsreq) + const struct timespec64 *tsreq) { enum alarmtimer_type type = clock2alarm(which_clock); struct restart_block *restart = ¤t->restart_block; diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 45f83cc7c0c7..81da124f1115 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1510,7 +1510,7 @@ static long __sched hrtimer_nanosleep_restart(struct restart_block *restart) return ret; } -long hrtimer_nanosleep(struct timespec64 *rqtp, +long hrtimer_nanosleep(const struct timespec64 *rqtp, const enum hrtimer_mode mode, const clockid_t clockid) { struct restart_block *restart; diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 3adfa42ca24c..9df618ee64cf 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1328,7 +1328,7 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, static long posix_cpu_nsleep_restart(struct restart_block *restart_block); static int posix_cpu_nsleep(const clockid_t which_clock, int flags, - struct timespec64 *rqtp) + const struct timespec64 *rqtp) { struct restart_block *restart_block = ¤t->restart_block; int error; @@ -1383,7 +1383,7 @@ static int process_cpu_timer_create(struct k_itimer *timer) return posix_cpu_timer_create(timer); } static int process_cpu_nsleep(const clockid_t which_clock, int flags, - struct timespec64 *rqtp) + const struct timespec64 *rqtp) { return posix_cpu_nsleep(PROCESS_CLOCK, flags, rqtp); } diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index c9f45a84fb8b..82d67be7d9d1 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -1214,9 +1214,9 @@ COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock, * nanosleep for monotonic and realtime clocks */ static int common_nsleep(const clockid_t which_clock, int flags, - struct timespec64 *tsave) + const struct timespec64 *rqtp) { - return hrtimer_nanosleep(tsave, flags & TIMER_ABSTIME ? + return hrtimer_nanosleep(rqtp, flags & TIMER_ABSTIME ? HRTIMER_MODE_ABS : HRTIMER_MODE_REL, which_clock); } diff --git a/kernel/time/posix-timers.h b/kernel/time/posix-timers.h index 5e69bb85629f..fb303c3be4d3 100644 --- a/kernel/time/posix-timers.h +++ b/kernel/time/posix-timers.h @@ -10,7 +10,7 @@ struct k_clock { int (*clock_adj)(const clockid_t which_clock, struct timex *tx); int (*timer_create)(struct k_itimer *timer); int (*nsleep)(const clockid_t which_clock, int flags, - struct timespec64 *); + const struct timespec64 *); int (*timer_set)(struct k_itimer *timr, int flags, struct itimerspec64 *new_setting, struct itimerspec64 *old_setting); -- cgit v1.2.3-58-ga151 From 1727339590fdb5a1ded881b540cd32121278d414 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Fri, 26 May 2017 16:56:11 +0200 Subject: clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE The CLOCKSOURCE_OF_DECLARE macro is used widely for the timers to declare the clocksource at early stage. However, this macro is also used to initialize the clockevent if any, or the clockevent only. It was originally suggested to declare another macro to initialize a clockevent, so in order to separate the two entities even they belong to the same IP. This was not accepted because of the impact on the DT where splitting a clocksource/clockevent definition does not make sense as it is a Linux concept not a hardware description. On the other side, the clocksource has not interrupt declared while the clockevent has, so it is easy from the driver to know if the description is for a clockevent or a clocksource, IOW it could be implemented at the driver level. So instead of dealing with a named clocksource macro, let's use a more generic one: TIMER_OF_DECLARE. The patch has not functional changes. Signed-off-by: Daniel Lezcano Acked-by: Heiko Stuebner Acked-by: Neil Armstrong Acked-by: Arnd Bergmann Acked-by: Matthias Brugger Reviewed-by: Linus Walleij --- arch/arm/kernel/smp_twd.c | 6 +++--- arch/microblaze/kernel/timer.c | 2 +- arch/mips/ralink/cevt-rt3352.c | 2 +- arch/nios2/kernel/time.c | 2 +- drivers/clocksource/arc_timer.c | 6 +++--- drivers/clocksource/arm_arch_timer.c | 6 +++--- drivers/clocksource/arm_global_timer.c | 2 +- drivers/clocksource/armv7m_systick.c | 2 +- drivers/clocksource/asm9260_timer.c | 2 +- drivers/clocksource/bcm2835_timer.c | 2 +- drivers/clocksource/bcm_kona_timer.c | 4 ++-- drivers/clocksource/cadence_ttc_timer.c | 2 +- drivers/clocksource/clksrc-dbx500-prcmu.c | 2 +- drivers/clocksource/clksrc_st_lpc.c | 2 +- drivers/clocksource/clps711x-timer.c | 2 +- drivers/clocksource/dw_apb_timer_of.c | 8 ++++---- drivers/clocksource/exynos_mct.c | 4 ++-- drivers/clocksource/fsl_ftm_timer.c | 2 +- drivers/clocksource/h8300_timer16.c | 2 +- drivers/clocksource/h8300_timer8.c | 2 +- drivers/clocksource/h8300_tpu.c | 2 +- drivers/clocksource/jcore-pit.c | 2 +- drivers/clocksource/meson6_timer.c | 2 +- drivers/clocksource/mips-gic-timer.c | 2 +- drivers/clocksource/mps2-timer.c | 2 +- drivers/clocksource/mtk_timer.c | 2 +- drivers/clocksource/mxs_timer.c | 2 +- drivers/clocksource/nomadik-mtu.c | 2 +- drivers/clocksource/pxa_timer.c | 2 +- drivers/clocksource/qcom-timer.c | 4 ++-- drivers/clocksource/renesas-ostm.c | 2 +- drivers/clocksource/rockchip_timer.c | 4 ++-- drivers/clocksource/samsung_pwm_timer.c | 8 ++++---- drivers/clocksource/sun4i_timer.c | 2 +- drivers/clocksource/tango_xtal.c | 2 +- drivers/clocksource/tegra20_timer.c | 4 ++-- drivers/clocksource/time-armada-370-xp.c | 6 +++--- drivers/clocksource/time-efm32.c | 4 ++-- drivers/clocksource/time-lpc32xx.c | 2 +- drivers/clocksource/time-orion.c | 2 +- drivers/clocksource/time-pistachio.c | 2 +- drivers/clocksource/timer-atlas7.c | 2 +- drivers/clocksource/timer-atmel-pit.c | 2 +- drivers/clocksource/timer-atmel-st.c | 2 +- drivers/clocksource/timer-digicolor.c | 2 +- drivers/clocksource/timer-fttmr010.c | 10 +++++----- drivers/clocksource/timer-imx-gpt.c | 24 ++++++++++++------------ drivers/clocksource/timer-integrator-ap.c | 2 +- drivers/clocksource/timer-keystone.c | 2 +- drivers/clocksource/timer-nps.c | 6 +++--- drivers/clocksource/timer-oxnas-rps.c | 4 ++-- drivers/clocksource/timer-prima2.c | 2 +- drivers/clocksource/timer-sp804.c | 4 ++-- drivers/clocksource/timer-stm32.c | 2 +- drivers/clocksource/timer-sun5i.c | 4 ++-- drivers/clocksource/timer-ti-32k.c | 2 +- drivers/clocksource/timer-u300.c | 2 +- drivers/clocksource/versatile.c | 4 ++-- drivers/clocksource/vf_pit_timer.c | 2 +- drivers/clocksource/vt8500_timer.c | 2 +- drivers/clocksource/zevio-timer.c | 2 +- include/linux/clocksource.h | 2 +- 62 files changed, 103 insertions(+), 103 deletions(-) diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c index 895ae5197159..b30eafeef096 100644 --- a/arch/arm/kernel/smp_twd.c +++ b/arch/arm/kernel/smp_twd.c @@ -403,7 +403,7 @@ out: WARN(err, "twd_local_timer_of_register failed (%d)\n", err); return err; } -CLOCKSOURCE_OF_DECLARE(arm_twd_a9, "arm,cortex-a9-twd-timer", twd_local_timer_of_register); -CLOCKSOURCE_OF_DECLARE(arm_twd_a5, "arm,cortex-a5-twd-timer", twd_local_timer_of_register); -CLOCKSOURCE_OF_DECLARE(arm_twd_11mp, "arm,arm11mp-twd-timer", twd_local_timer_of_register); +TIMER_OF_DECLARE(arm_twd_a9, "arm,cortex-a9-twd-timer", twd_local_timer_of_register); +TIMER_OF_DECLARE(arm_twd_a5, "arm,cortex-a5-twd-timer", twd_local_timer_of_register); +TIMER_OF_DECLARE(arm_twd_11mp, "arm,arm11mp-twd-timer", twd_local_timer_of_register); #endif diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c index 999066192715..873a1ccd9040 100644 --- a/arch/microblaze/kernel/timer.c +++ b/arch/microblaze/kernel/timer.c @@ -333,5 +333,5 @@ static int __init xilinx_timer_init(struct device_node *timer) return 0; } -CLOCKSOURCE_OF_DECLARE(xilinx_timer, "xlnx,xps-timer-1.00.a", +TIMER_OF_DECLARE(xilinx_timer, "xlnx,xps-timer-1.00.a", xilinx_timer_init); diff --git a/arch/mips/ralink/cevt-rt3352.c b/arch/mips/ralink/cevt-rt3352.c index b8a1376165b0..92f284d2b802 100644 --- a/arch/mips/ralink/cevt-rt3352.c +++ b/arch/mips/ralink/cevt-rt3352.c @@ -152,4 +152,4 @@ static int __init ralink_systick_init(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(systick, "ralink,cevt-systick", ralink_systick_init); +TIMER_OF_DECLARE(systick, "ralink,cevt-systick", ralink_systick_init); diff --git a/arch/nios2/kernel/time.c b/arch/nios2/kernel/time.c index 6e2bdc9b8530..2954b6617378 100644 --- a/arch/nios2/kernel/time.c +++ b/arch/nios2/kernel/time.c @@ -353,4 +353,4 @@ void __init time_init(void) clocksource_probe(); } -CLOCKSOURCE_OF_DECLARE(nios2_timer, ALTR_TIMER_COMPATIBLE, nios2_time_init); +TIMER_OF_DECLARE(nios2_timer, ALTR_TIMER_COMPATIBLE, nios2_time_init); diff --git a/drivers/clocksource/arc_timer.c b/drivers/clocksource/arc_timer.c index 21649733827d..4927355f9cbe 100644 --- a/drivers/clocksource/arc_timer.c +++ b/drivers/clocksource/arc_timer.c @@ -99,7 +99,7 @@ static int __init arc_cs_setup_gfrc(struct device_node *node) return clocksource_register_hz(&arc_counter_gfrc, arc_timer_freq); } -CLOCKSOURCE_OF_DECLARE(arc_gfrc, "snps,archs-timer-gfrc", arc_cs_setup_gfrc); +TIMER_OF_DECLARE(arc_gfrc, "snps,archs-timer-gfrc", arc_cs_setup_gfrc); #define AUX_RTC_CTRL 0x103 #define AUX_RTC_LOW 0x104 @@ -158,7 +158,7 @@ static int __init arc_cs_setup_rtc(struct device_node *node) return clocksource_register_hz(&arc_counter_rtc, arc_timer_freq); } -CLOCKSOURCE_OF_DECLARE(arc_rtc, "snps,archs-timer-rtc", arc_cs_setup_rtc); +TIMER_OF_DECLARE(arc_rtc, "snps,archs-timer-rtc", arc_cs_setup_rtc); #endif @@ -333,4 +333,4 @@ static int __init arc_of_timer_init(struct device_node *np) return ret; } -CLOCKSOURCE_OF_DECLARE(arc_clkevt, "snps,arc-timer", arc_of_timer_init); +TIMER_OF_DECLARE(arc_clkevt, "snps,arc-timer", arc_of_timer_init); diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 4bed671e490e..bc60cd78698e 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -1194,8 +1194,8 @@ static int __init arch_timer_of_init(struct device_node *np) return arch_timer_common_init(); } -CLOCKSOURCE_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_of_init); -CLOCKSOURCE_OF_DECLARE(armv8_arch_timer, "arm,armv8-timer", arch_timer_of_init); +TIMER_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_of_init); +TIMER_OF_DECLARE(armv8_arch_timer, "arm,armv8-timer", arch_timer_of_init); static u32 __init arch_timer_mem_frame_get_cntfrq(struct arch_timer_mem_frame *frame) @@ -1382,7 +1382,7 @@ out: kfree(timer_mem); return ret; } -CLOCKSOURCE_OF_DECLARE(armv7_arch_timer_mem, "arm,armv7-timer-mem", +TIMER_OF_DECLARE(armv7_arch_timer_mem, "arm,armv7-timer-mem", arch_timer_mem_of_init); #ifdef CONFIG_ACPI_GTDT diff --git a/drivers/clocksource/arm_global_timer.c b/drivers/clocksource/arm_global_timer.c index 123ed20ac2ff..095bb965f621 100644 --- a/drivers/clocksource/arm_global_timer.c +++ b/drivers/clocksource/arm_global_timer.c @@ -339,5 +339,5 @@ out_unmap: } /* Only tested on r2p2 and r3p0 */ -CLOCKSOURCE_OF_DECLARE(arm_gt, "arm,cortex-a9-global-timer", +TIMER_OF_DECLARE(arm_gt, "arm,cortex-a9-global-timer", global_timer_of_register); diff --git a/drivers/clocksource/armv7m_systick.c b/drivers/clocksource/armv7m_systick.c index a315491b7047..ac046d6fb0bf 100644 --- a/drivers/clocksource/armv7m_systick.c +++ b/drivers/clocksource/armv7m_systick.c @@ -82,5 +82,5 @@ out_unmap: return ret; } -CLOCKSOURCE_OF_DECLARE(arm_systick, "arm,armv7m-systick", +TIMER_OF_DECLARE(arm_systick, "arm,armv7m-systick", system_timer_of_register); diff --git a/drivers/clocksource/asm9260_timer.c b/drivers/clocksource/asm9260_timer.c index c6780830b8ac..38cd2feb87c4 100644 --- a/drivers/clocksource/asm9260_timer.c +++ b/drivers/clocksource/asm9260_timer.c @@ -238,5 +238,5 @@ static int __init asm9260_timer_init(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(asm9260_timer, "alphascale,asm9260-timer", +TIMER_OF_DECLARE(asm9260_timer, "alphascale,asm9260-timer", asm9260_timer_init); diff --git a/drivers/clocksource/bcm2835_timer.c b/drivers/clocksource/bcm2835_timer.c index dce44307469e..82828d3a4739 100644 --- a/drivers/clocksource/bcm2835_timer.c +++ b/drivers/clocksource/bcm2835_timer.c @@ -148,5 +148,5 @@ err_iounmap: iounmap(base); return ret; } -CLOCKSOURCE_OF_DECLARE(bcm2835, "brcm,bcm2835-system-timer", +TIMER_OF_DECLARE(bcm2835, "brcm,bcm2835-system-timer", bcm2835_timer_init); diff --git a/drivers/clocksource/bcm_kona_timer.c b/drivers/clocksource/bcm_kona_timer.c index fda5e1476638..5c40be9880f5 100644 --- a/drivers/clocksource/bcm_kona_timer.c +++ b/drivers/clocksource/bcm_kona_timer.c @@ -198,9 +198,9 @@ static int __init kona_timer_init(struct device_node *node) return 0; } -CLOCKSOURCE_OF_DECLARE(brcm_kona, "brcm,kona-timer", kona_timer_init); +TIMER_OF_DECLARE(brcm_kona, "brcm,kona-timer", kona_timer_init); /* * bcm,kona-timer is deprecated by brcm,kona-timer * being kept here for driver compatibility */ -CLOCKSOURCE_OF_DECLARE(bcm_kona, "bcm,kona-timer", kona_timer_init); +TIMER_OF_DECLARE(bcm_kona, "bcm,kona-timer", kona_timer_init); diff --git a/drivers/clocksource/cadence_ttc_timer.c b/drivers/clocksource/cadence_ttc_timer.c index 44e5e951583b..a144dfca6499 100644 --- a/drivers/clocksource/cadence_ttc_timer.c +++ b/drivers/clocksource/cadence_ttc_timer.c @@ -539,4 +539,4 @@ static int __init ttc_timer_init(struct device_node *timer) return 0; } -CLOCKSOURCE_OF_DECLARE(ttc, "cdns,ttc", ttc_timer_init); +TIMER_OF_DECLARE(ttc, "cdns,ttc", ttc_timer_init); diff --git a/drivers/clocksource/clksrc-dbx500-prcmu.c b/drivers/clocksource/clksrc-dbx500-prcmu.c index c69e2772658d..c1b96dc5f444 100644 --- a/drivers/clocksource/clksrc-dbx500-prcmu.c +++ b/drivers/clocksource/clksrc-dbx500-prcmu.c @@ -86,5 +86,5 @@ static int __init clksrc_dbx500_prcmu_init(struct device_node *node) #endif return clocksource_register_hz(&clocksource_dbx500_prcmu, RATE_32K); } -CLOCKSOURCE_OF_DECLARE(dbx500_prcmu, "stericsson,db8500-prcmu-timer-4", +TIMER_OF_DECLARE(dbx500_prcmu, "stericsson,db8500-prcmu-timer-4", clksrc_dbx500_prcmu_init); diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c index 03cc49217bb4..a1d01ebb81f5 100644 --- a/drivers/clocksource/clksrc_st_lpc.c +++ b/drivers/clocksource/clksrc_st_lpc.c @@ -132,4 +132,4 @@ static int __init st_clksrc_of_register(struct device_node *np) return ret; } -CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register); +TIMER_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register); diff --git a/drivers/clocksource/clps711x-timer.c b/drivers/clocksource/clps711x-timer.c index 24db6d605549..fc9e025cc395 100644 --- a/drivers/clocksource/clps711x-timer.c +++ b/drivers/clocksource/clps711x-timer.c @@ -119,5 +119,5 @@ static int __init clps711x_timer_init(struct device_node *np) return -EINVAL; } } -CLOCKSOURCE_OF_DECLARE(clps711x, "cirrus,ep7209-timer", clps711x_timer_init); +TIMER_OF_DECLARE(clps711x, "cirrus,ep7209-timer", clps711x_timer_init); #endif diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c index aee6c0d39a7c..69866cd8f4bb 100644 --- a/drivers/clocksource/dw_apb_timer_of.c +++ b/drivers/clocksource/dw_apb_timer_of.c @@ -167,7 +167,7 @@ static int __init dw_apb_timer_init(struct device_node *timer) return 0; } -CLOCKSOURCE_OF_DECLARE(pc3x2_timer, "picochip,pc3x2-timer", dw_apb_timer_init); -CLOCKSOURCE_OF_DECLARE(apb_timer_osc, "snps,dw-apb-timer-osc", dw_apb_timer_init); -CLOCKSOURCE_OF_DECLARE(apb_timer_sp, "snps,dw-apb-timer-sp", dw_apb_timer_init); -CLOCKSOURCE_OF_DECLARE(apb_timer, "snps,dw-apb-timer", dw_apb_timer_init); +TIMER_OF_DECLARE(pc3x2_timer, "picochip,pc3x2-timer", dw_apb_timer_init); +TIMER_OF_DECLARE(apb_timer_osc, "snps,dw-apb-timer-osc", dw_apb_timer_init); +TIMER_OF_DECLARE(apb_timer_sp, "snps,dw-apb-timer-sp", dw_apb_timer_init); +TIMER_OF_DECLARE(apb_timer, "snps,dw-apb-timer", dw_apb_timer_init); diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c index 670ff0f25b67..7a244b681876 100644 --- a/drivers/clocksource/exynos_mct.c +++ b/drivers/clocksource/exynos_mct.c @@ -610,5 +610,5 @@ static int __init mct_init_ppi(struct device_node *np) { return mct_init_dt(np, MCT_INT_PPI); } -CLOCKSOURCE_OF_DECLARE(exynos4210, "samsung,exynos4210-mct", mct_init_spi); -CLOCKSOURCE_OF_DECLARE(exynos4412, "samsung,exynos4412-mct", mct_init_ppi); +TIMER_OF_DECLARE(exynos4210, "samsung,exynos4210-mct", mct_init_spi); +TIMER_OF_DECLARE(exynos4412, "samsung,exynos4412-mct", mct_init_ppi); diff --git a/drivers/clocksource/fsl_ftm_timer.c b/drivers/clocksource/fsl_ftm_timer.c index 738515b89073..3121e2d96c91 100644 --- a/drivers/clocksource/fsl_ftm_timer.c +++ b/drivers/clocksource/fsl_ftm_timer.c @@ -369,4 +369,4 @@ err: kfree(priv); return ret; } -CLOCKSOURCE_OF_DECLARE(flextimer, "fsl,ftm-timer", ftm_timer_init); +TIMER_OF_DECLARE(flextimer, "fsl,ftm-timer", ftm_timer_init); diff --git a/drivers/clocksource/h8300_timer16.c b/drivers/clocksource/h8300_timer16.c index 5b27fb9997c2..dfbd4f8051cb 100644 --- a/drivers/clocksource/h8300_timer16.c +++ b/drivers/clocksource/h8300_timer16.c @@ -187,5 +187,5 @@ free_clk: return ret; } -CLOCKSOURCE_OF_DECLARE(h8300_16bit, "renesas,16bit-timer", +TIMER_OF_DECLARE(h8300_16bit, "renesas,16bit-timer", h8300_16timer_init); diff --git a/drivers/clocksource/h8300_timer8.c b/drivers/clocksource/h8300_timer8.c index 804c489531d6..f6ffb0cef091 100644 --- a/drivers/clocksource/h8300_timer8.c +++ b/drivers/clocksource/h8300_timer8.c @@ -207,4 +207,4 @@ free_clk: return ret; } -CLOCKSOURCE_OF_DECLARE(h8300_8bit, "renesas,8bit-timer", h8300_8timer_init); +TIMER_OF_DECLARE(h8300_8bit, "renesas,8bit-timer", h8300_8timer_init); diff --git a/drivers/clocksource/h8300_tpu.c b/drivers/clocksource/h8300_tpu.c index 72e1cf2b3096..45a8d17dac1e 100644 --- a/drivers/clocksource/h8300_tpu.c +++ b/drivers/clocksource/h8300_tpu.c @@ -154,4 +154,4 @@ free_clk: return ret; } -CLOCKSOURCE_OF_DECLARE(h8300_tpu, "renesas,tpu", h8300_tpu_init); +TIMER_OF_DECLARE(h8300_tpu, "renesas,tpu", h8300_tpu_init); diff --git a/drivers/clocksource/jcore-pit.c b/drivers/clocksource/jcore-pit.c index 7c61226f4359..5d3d88e0fc8c 100644 --- a/drivers/clocksource/jcore-pit.c +++ b/drivers/clocksource/jcore-pit.c @@ -246,4 +246,4 @@ static int __init jcore_pit_init(struct device_node *node) return 0; } -CLOCKSOURCE_OF_DECLARE(jcore_pit, "jcore,pit", jcore_pit_init); +TIMER_OF_DECLARE(jcore_pit, "jcore,pit", jcore_pit_init); diff --git a/drivers/clocksource/meson6_timer.c b/drivers/clocksource/meson6_timer.c index 39d21f693a33..92f20991a937 100644 --- a/drivers/clocksource/meson6_timer.c +++ b/drivers/clocksource/meson6_timer.c @@ -174,5 +174,5 @@ static int __init meson6_timer_init(struct device_node *node) 1, 0xfffe); return 0; } -CLOCKSOURCE_OF_DECLARE(meson6, "amlogic,meson6-timer", +TIMER_OF_DECLARE(meson6, "amlogic,meson6-timer", meson6_timer_init); diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c index 3f52ee219923..e31e08326024 100644 --- a/drivers/clocksource/mips-gic-timer.c +++ b/drivers/clocksource/mips-gic-timer.c @@ -200,5 +200,5 @@ static int __init gic_clocksource_of_init(struct device_node *node) return 0; } -CLOCKSOURCE_OF_DECLARE(mips_gic_timer, "mti,gic-timer", +TIMER_OF_DECLARE(mips_gic_timer, "mti,gic-timer", gic_clocksource_of_init); diff --git a/drivers/clocksource/mps2-timer.c b/drivers/clocksource/mps2-timer.c index 3e4431ed9aa9..aa4d63af8706 100644 --- a/drivers/clocksource/mps2-timer.c +++ b/drivers/clocksource/mps2-timer.c @@ -274,4 +274,4 @@ static int __init mps2_timer_init(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(mps2_timer, "arm,mps2-timer", mps2_timer_init); +TIMER_OF_DECLARE(mps2_timer, "arm,mps2-timer", mps2_timer_init); diff --git a/drivers/clocksource/mtk_timer.c b/drivers/clocksource/mtk_timer.c index 90659493c59c..f9b724fd9950 100644 --- a/drivers/clocksource/mtk_timer.c +++ b/drivers/clocksource/mtk_timer.c @@ -265,4 +265,4 @@ err_kzalloc: return -EINVAL; } -CLOCKSOURCE_OF_DECLARE(mtk_mt6577, "mediatek,mt6577-timer", mtk_timer_init); +TIMER_OF_DECLARE(mtk_mt6577, "mediatek,mt6577-timer", mtk_timer_init); diff --git a/drivers/clocksource/mxs_timer.c b/drivers/clocksource/mxs_timer.c index 99b77aff0839..a03434e9fe8f 100644 --- a/drivers/clocksource/mxs_timer.c +++ b/drivers/clocksource/mxs_timer.c @@ -293,4 +293,4 @@ static int __init mxs_timer_init(struct device_node *np) return setup_irq(irq, &mxs_timer_irq); } -CLOCKSOURCE_OF_DECLARE(mxs, "fsl,timrot", mxs_timer_init); +TIMER_OF_DECLARE(mxs, "fsl,timrot", mxs_timer_init); diff --git a/drivers/clocksource/nomadik-mtu.c b/drivers/clocksource/nomadik-mtu.c index 7d44de304f37..8e4ddb9420c6 100644 --- a/drivers/clocksource/nomadik-mtu.c +++ b/drivers/clocksource/nomadik-mtu.c @@ -284,5 +284,5 @@ static int __init nmdk_timer_of_init(struct device_node *node) return nmdk_timer_init(base, irq, pclk, clk); } -CLOCKSOURCE_OF_DECLARE(nomadik_mtu, "st,nomadik-mtu", +TIMER_OF_DECLARE(nomadik_mtu, "st,nomadik-mtu", nmdk_timer_of_init); diff --git a/drivers/clocksource/pxa_timer.c b/drivers/clocksource/pxa_timer.c index a10fa667325f..08cd6eaf3795 100644 --- a/drivers/clocksource/pxa_timer.c +++ b/drivers/clocksource/pxa_timer.c @@ -216,7 +216,7 @@ static int __init pxa_timer_dt_init(struct device_node *np) return pxa_timer_common_init(irq, clk_get_rate(clk)); } -CLOCKSOURCE_OF_DECLARE(pxa_timer, "marvell,pxa-timer", pxa_timer_dt_init); +TIMER_OF_DECLARE(pxa_timer, "marvell,pxa-timer", pxa_timer_dt_init); /* * Legacy timer init for non device-tree boards. diff --git a/drivers/clocksource/qcom-timer.c b/drivers/clocksource/qcom-timer.c index ee358cdf4a07..89816f89ff3f 100644 --- a/drivers/clocksource/qcom-timer.c +++ b/drivers/clocksource/qcom-timer.c @@ -254,5 +254,5 @@ static int __init msm_dt_timer_init(struct device_node *np) return msm_timer_init(freq, 32, irq, !!percpu_offset); } -CLOCKSOURCE_OF_DECLARE(kpss_timer, "qcom,kpss-timer", msm_dt_timer_init); -CLOCKSOURCE_OF_DECLARE(scss_timer, "qcom,scss-timer", msm_dt_timer_init); +TIMER_OF_DECLARE(kpss_timer, "qcom,kpss-timer", msm_dt_timer_init); +TIMER_OF_DECLARE(scss_timer, "qcom,scss-timer", msm_dt_timer_init); diff --git a/drivers/clocksource/renesas-ostm.c b/drivers/clocksource/renesas-ostm.c index c76f57668fb2..6cffd7c6001a 100644 --- a/drivers/clocksource/renesas-ostm.c +++ b/drivers/clocksource/renesas-ostm.c @@ -262,4 +262,4 @@ err: return 0; } -CLOCKSOURCE_OF_DECLARE(ostm, "renesas,ostm", ostm_init); +TIMER_OF_DECLARE(ostm, "renesas,ostm", ostm_init); diff --git a/drivers/clocksource/rockchip_timer.c b/drivers/clocksource/rockchip_timer.c index 49c02be50eca..c27f4c850d83 100644 --- a/drivers/clocksource/rockchip_timer.c +++ b/drivers/clocksource/rockchip_timer.c @@ -303,5 +303,5 @@ static int __init rk_timer_init(struct device_node *np) return -EINVAL; } -CLOCKSOURCE_OF_DECLARE(rk3288_timer, "rockchip,rk3288-timer", rk_timer_init); -CLOCKSOURCE_OF_DECLARE(rk3399_timer, "rockchip,rk3399-timer", rk_timer_init); +TIMER_OF_DECLARE(rk3288_timer, "rockchip,rk3288-timer", rk_timer_init); +TIMER_OF_DECLARE(rk3399_timer, "rockchip,rk3399-timer", rk_timer_init); diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c index a68e6538c809..21cd72c55a2d 100644 --- a/drivers/clocksource/samsung_pwm_timer.c +++ b/drivers/clocksource/samsung_pwm_timer.c @@ -466,7 +466,7 @@ static int __init s3c2410_pwm_clocksource_init(struct device_node *np) { return samsung_pwm_alloc(np, &s3c24xx_variant); } -CLOCKSOURCE_OF_DECLARE(s3c2410_pwm, "samsung,s3c2410-pwm", s3c2410_pwm_clocksource_init); +TIMER_OF_DECLARE(s3c2410_pwm, "samsung,s3c2410-pwm", s3c2410_pwm_clocksource_init); static const struct samsung_pwm_variant s3c64xx_variant = { .bits = 32, @@ -479,7 +479,7 @@ static int __init s3c64xx_pwm_clocksource_init(struct device_node *np) { return samsung_pwm_alloc(np, &s3c64xx_variant); } -CLOCKSOURCE_OF_DECLARE(s3c6400_pwm, "samsung,s3c6400-pwm", s3c64xx_pwm_clocksource_init); +TIMER_OF_DECLARE(s3c6400_pwm, "samsung,s3c6400-pwm", s3c64xx_pwm_clocksource_init); static const struct samsung_pwm_variant s5p64x0_variant = { .bits = 32, @@ -492,7 +492,7 @@ static int __init s5p64x0_pwm_clocksource_init(struct device_node *np) { return samsung_pwm_alloc(np, &s5p64x0_variant); } -CLOCKSOURCE_OF_DECLARE(s5p6440_pwm, "samsung,s5p6440-pwm", s5p64x0_pwm_clocksource_init); +TIMER_OF_DECLARE(s5p6440_pwm, "samsung,s5p6440-pwm", s5p64x0_pwm_clocksource_init); static const struct samsung_pwm_variant s5p_variant = { .bits = 32, @@ -505,5 +505,5 @@ static int __init s5p_pwm_clocksource_init(struct device_node *np) { return samsung_pwm_alloc(np, &s5p_variant); } -CLOCKSOURCE_OF_DECLARE(s5pc100_pwm, "samsung,s5pc100-pwm", s5p_pwm_clocksource_init); +TIMER_OF_DECLARE(s5pc100_pwm, "samsung,s5pc100-pwm", s5p_pwm_clocksource_init); #endif diff --git a/drivers/clocksource/sun4i_timer.c b/drivers/clocksource/sun4i_timer.c index 4452d5c8f304..3e4bc64ff176 100644 --- a/drivers/clocksource/sun4i_timer.c +++ b/drivers/clocksource/sun4i_timer.c @@ -233,5 +233,5 @@ static int __init sun4i_timer_init(struct device_node *node) return ret; } -CLOCKSOURCE_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer", +TIMER_OF_DECLARE(sun4i, "allwinner,sun4i-a10-timer", sun4i_timer_init); diff --git a/drivers/clocksource/tango_xtal.c b/drivers/clocksource/tango_xtal.c index 12fcef8cf2d3..c4e1c2e6046f 100644 --- a/drivers/clocksource/tango_xtal.c +++ b/drivers/clocksource/tango_xtal.c @@ -53,4 +53,4 @@ static int __init tango_clocksource_init(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(tango, "sigma,tick-counter", tango_clocksource_init); +TIMER_OF_DECLARE(tango, "sigma,tick-counter", tango_clocksource_init); diff --git a/drivers/clocksource/tegra20_timer.c b/drivers/clocksource/tegra20_timer.c index b9990b9c98c5..c337a8100a7b 100644 --- a/drivers/clocksource/tegra20_timer.c +++ b/drivers/clocksource/tegra20_timer.c @@ -237,7 +237,7 @@ static int __init tegra20_init_timer(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(tegra20_timer, "nvidia,tegra20-timer", tegra20_init_timer); +TIMER_OF_DECLARE(tegra20_timer, "nvidia,tegra20-timer", tegra20_init_timer); static int __init tegra20_init_rtc(struct device_node *np) { @@ -261,4 +261,4 @@ static int __init tegra20_init_rtc(struct device_node *np) return register_persistent_clock(NULL, tegra_read_persistent_clock64); } -CLOCKSOURCE_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc); +TIMER_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc); diff --git a/drivers/clocksource/time-armada-370-xp.c b/drivers/clocksource/time-armada-370-xp.c index aea4380129ea..edf1a46269f1 100644 --- a/drivers/clocksource/time-armada-370-xp.c +++ b/drivers/clocksource/time-armada-370-xp.c @@ -351,7 +351,7 @@ static int __init armada_xp_timer_init(struct device_node *np) return armada_370_xp_timer_common_init(np); } -CLOCKSOURCE_OF_DECLARE(armada_xp, "marvell,armada-xp-timer", +TIMER_OF_DECLARE(armada_xp, "marvell,armada-xp-timer", armada_xp_timer_init); static int __init armada_375_timer_init(struct device_node *np) @@ -389,7 +389,7 @@ static int __init armada_375_timer_init(struct device_node *np) return armada_370_xp_timer_common_init(np); } -CLOCKSOURCE_OF_DECLARE(armada_375, "marvell,armada-375-timer", +TIMER_OF_DECLARE(armada_375, "marvell,armada-375-timer", armada_375_timer_init); static int __init armada_370_timer_init(struct device_node *np) @@ -412,5 +412,5 @@ static int __init armada_370_timer_init(struct device_node *np) return armada_370_xp_timer_common_init(np); } -CLOCKSOURCE_OF_DECLARE(armada_370, "marvell,armada-370-timer", +TIMER_OF_DECLARE(armada_370, "marvell,armada-370-timer", armada_370_timer_init); diff --git a/drivers/clocksource/time-efm32.c b/drivers/clocksource/time-efm32.c index ce0f97b4e5db..257e810ec1ad 100644 --- a/drivers/clocksource/time-efm32.c +++ b/drivers/clocksource/time-efm32.c @@ -283,5 +283,5 @@ static int __init efm32_timer_init(struct device_node *np) return ret; } -CLOCKSOURCE_OF_DECLARE(efm32compat, "efm32,timer", efm32_timer_init); -CLOCKSOURCE_OF_DECLARE(efm32, "energymicro,efm32-timer", efm32_timer_init); +TIMER_OF_DECLARE(efm32compat, "efm32,timer", efm32_timer_init); +TIMER_OF_DECLARE(efm32, "energymicro,efm32-timer", efm32_timer_init); diff --git a/drivers/clocksource/time-lpc32xx.c b/drivers/clocksource/time-lpc32xx.c index 9649cfdb9213..d51a62a79ef7 100644 --- a/drivers/clocksource/time-lpc32xx.c +++ b/drivers/clocksource/time-lpc32xx.c @@ -311,4 +311,4 @@ static int __init lpc32xx_timer_init(struct device_node *np) return ret; } -CLOCKSOURCE_OF_DECLARE(lpc32xx_timer, "nxp,lpc3220-timer", lpc32xx_timer_init); +TIMER_OF_DECLARE(lpc32xx_timer, "nxp,lpc3220-timer", lpc32xx_timer_init); diff --git a/drivers/clocksource/time-orion.c b/drivers/clocksource/time-orion.c index b9b97f630c4d..12202067fe4b 100644 --- a/drivers/clocksource/time-orion.c +++ b/drivers/clocksource/time-orion.c @@ -189,4 +189,4 @@ static int __init orion_timer_init(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(orion_timer, "marvell,orion-timer", orion_timer_init); +TIMER_OF_DECLARE(orion_timer, "marvell,orion-timer", orion_timer_init); diff --git a/drivers/clocksource/time-pistachio.c b/drivers/clocksource/time-pistachio.c index 3710e4d9dcba..a2dd85d0c1d7 100644 --- a/drivers/clocksource/time-pistachio.c +++ b/drivers/clocksource/time-pistachio.c @@ -214,5 +214,5 @@ static int __init pistachio_clksrc_of_init(struct device_node *node) sched_clock_register(pistachio_read_sched_clock, 32, rate); return clocksource_register_hz(&pcs_gpt.cs, rate); } -CLOCKSOURCE_OF_DECLARE(pistachio_gptimer, "img,pistachio-gptimer", +TIMER_OF_DECLARE(pistachio_gptimer, "img,pistachio-gptimer", pistachio_clksrc_of_init); diff --git a/drivers/clocksource/timer-atlas7.c b/drivers/clocksource/timer-atlas7.c index 50300eec4a39..62c4bbc55a7e 100644 --- a/drivers/clocksource/timer-atlas7.c +++ b/drivers/clocksource/timer-atlas7.c @@ -283,4 +283,4 @@ static int __init sirfsoc_of_timer_init(struct device_node *np) return sirfsoc_atlas7_timer_init(np); } -CLOCKSOURCE_OF_DECLARE(sirfsoc_atlas7_timer, "sirf,atlas7-tick", sirfsoc_of_timer_init); +TIMER_OF_DECLARE(sirfsoc_atlas7_timer, "sirf,atlas7-tick", sirfsoc_of_timer_init); diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c index cc112351dc70..ec8a4376f74f 100644 --- a/drivers/clocksource/timer-atmel-pit.c +++ b/drivers/clocksource/timer-atmel-pit.c @@ -255,5 +255,5 @@ static int __init at91sam926x_pit_dt_init(struct device_node *node) return 0; } -CLOCKSOURCE_OF_DECLARE(at91sam926x_pit, "atmel,at91sam9260-pit", +TIMER_OF_DECLARE(at91sam926x_pit, "atmel,at91sam9260-pit", at91sam926x_pit_dt_init); diff --git a/drivers/clocksource/timer-atmel-st.c b/drivers/clocksource/timer-atmel-st.c index be4ac7604136..d2e660f475af 100644 --- a/drivers/clocksource/timer-atmel-st.c +++ b/drivers/clocksource/timer-atmel-st.c @@ -260,5 +260,5 @@ static int __init atmel_st_timer_init(struct device_node *node) /* register clocksource */ return clocksource_register_hz(&clk32k, sclk_rate); } -CLOCKSOURCE_OF_DECLARE(atmel_st_timer, "atmel,at91rm9200-st", +TIMER_OF_DECLARE(atmel_st_timer, "atmel,at91rm9200-st", atmel_st_timer_init); diff --git a/drivers/clocksource/timer-digicolor.c b/drivers/clocksource/timer-digicolor.c index 94a161eb9cce..1e984a4d8ad0 100644 --- a/drivers/clocksource/timer-digicolor.c +++ b/drivers/clocksource/timer-digicolor.c @@ -203,5 +203,5 @@ static int __init digicolor_timer_init(struct device_node *node) return 0; } -CLOCKSOURCE_OF_DECLARE(conexant_digicolor, "cnxt,cx92755-timer", +TIMER_OF_DECLARE(conexant_digicolor, "cnxt,cx92755-timer", digicolor_timer_init); diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index d96190e85c66..a21020c57df6 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -364,8 +364,8 @@ static __init int fttmr010_timer_init(struct device_node *np) return fttmr010_common_init(np, false); } -CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_init); -CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", fttmr010_timer_init); -CLOCKSOURCE_OF_DECLARE(moxart, "moxa,moxart-timer", fttmr010_timer_init); -CLOCKSOURCE_OF_DECLARE(ast2400, "aspeed,ast2400-timer", aspeed_timer_init); -CLOCKSOURCE_OF_DECLARE(ast2500, "aspeed,ast2500-timer", aspeed_timer_init); +TIMER_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_init); +TIMER_OF_DECLARE(gemini, "cortina,gemini-timer", fttmr010_timer_init); +TIMER_OF_DECLARE(moxart, "moxa,moxart-timer", fttmr010_timer_init); +TIMER_OF_DECLARE(ast2400, "aspeed,ast2400-timer", aspeed_timer_init); +TIMER_OF_DECLARE(ast2500, "aspeed,ast2500-timer", aspeed_timer_init); diff --git a/drivers/clocksource/timer-imx-gpt.c b/drivers/clocksource/timer-imx-gpt.c index f595460bfc58..6ec6d79b237c 100644 --- a/drivers/clocksource/timer-imx-gpt.c +++ b/drivers/clocksource/timer-imx-gpt.c @@ -545,15 +545,15 @@ static int __init imx6dl_timer_init_dt(struct device_node *np) return mxc_timer_init_dt(np, GPT_TYPE_IMX6DL); } -CLOCKSOURCE_OF_DECLARE(imx1_timer, "fsl,imx1-gpt", imx1_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx21_timer, "fsl,imx21-gpt", imx21_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx27_timer, "fsl,imx27-gpt", imx21_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx31_timer, "fsl,imx31-gpt", imx31_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx25_timer, "fsl,imx25-gpt", imx31_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx50_timer, "fsl,imx50-gpt", imx31_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx51_timer, "fsl,imx51-gpt", imx31_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx53_timer, "fsl,imx53-gpt", imx31_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx6q_timer, "fsl,imx6q-gpt", imx31_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx6dl_timer, "fsl,imx6dl-gpt", imx6dl_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx6sl_timer, "fsl,imx6sl-gpt", imx6dl_timer_init_dt); -CLOCKSOURCE_OF_DECLARE(imx6sx_timer, "fsl,imx6sx-gpt", imx6dl_timer_init_dt); +TIMER_OF_DECLARE(imx1_timer, "fsl,imx1-gpt", imx1_timer_init_dt); +TIMER_OF_DECLARE(imx21_timer, "fsl,imx21-gpt", imx21_timer_init_dt); +TIMER_OF_DECLARE(imx27_timer, "fsl,imx27-gpt", imx21_timer_init_dt); +TIMER_OF_DECLARE(imx31_timer, "fsl,imx31-gpt", imx31_timer_init_dt); +TIMER_OF_DECLARE(imx25_timer, "fsl,imx25-gpt", imx31_timer_init_dt); +TIMER_OF_DECLARE(imx50_timer, "fsl,imx50-gpt", imx31_timer_init_dt); +TIMER_OF_DECLARE(imx51_timer, "fsl,imx51-gpt", imx31_timer_init_dt); +TIMER_OF_DECLARE(imx53_timer, "fsl,imx53-gpt", imx31_timer_init_dt); +TIMER_OF_DECLARE(imx6q_timer, "fsl,imx6q-gpt", imx31_timer_init_dt); +TIMER_OF_DECLARE(imx6dl_timer, "fsl,imx6dl-gpt", imx6dl_timer_init_dt); +TIMER_OF_DECLARE(imx6sl_timer, "fsl,imx6sl-gpt", imx6dl_timer_init_dt); +TIMER_OF_DECLARE(imx6sx_timer, "fsl,imx6sx-gpt", imx6dl_timer_init_dt); diff --git a/drivers/clocksource/timer-integrator-ap.c b/drivers/clocksource/timer-integrator-ap.c index 04ad3066e190..2ff64d9d4fb3 100644 --- a/drivers/clocksource/timer-integrator-ap.c +++ b/drivers/clocksource/timer-integrator-ap.c @@ -232,5 +232,5 @@ static int __init integrator_ap_timer_init_of(struct device_node *node) return 0; } -CLOCKSOURCE_OF_DECLARE(integrator_ap_timer, "arm,integrator-timer", +TIMER_OF_DECLARE(integrator_ap_timer, "arm,integrator-timer", integrator_ap_timer_init_of); diff --git a/drivers/clocksource/timer-keystone.c b/drivers/clocksource/timer-keystone.c index ab68a47ab3b4..0eee03250cfc 100644 --- a/drivers/clocksource/timer-keystone.c +++ b/drivers/clocksource/timer-keystone.c @@ -226,5 +226,5 @@ err: return error; } -CLOCKSOURCE_OF_DECLARE(keystone_timer, "ti,keystone-timer", +TIMER_OF_DECLARE(keystone_timer, "ti,keystone-timer", keystone_timer_init); diff --git a/drivers/clocksource/timer-nps.c b/drivers/clocksource/timer-nps.c index e74ea1722ad3..7b6bb0df96ae 100644 --- a/drivers/clocksource/timer-nps.c +++ b/drivers/clocksource/timer-nps.c @@ -110,9 +110,9 @@ static int __init nps_setup_clocksource(struct device_node *node) return ret; } -CLOCKSOURCE_OF_DECLARE(ezchip_nps400_clksrc, "ezchip,nps400-timer", +TIMER_OF_DECLARE(ezchip_nps400_clksrc, "ezchip,nps400-timer", nps_setup_clocksource); -CLOCKSOURCE_OF_DECLARE(ezchip_nps400_clk_src, "ezchip,nps400-timer1", +TIMER_OF_DECLARE(ezchip_nps400_clk_src, "ezchip,nps400-timer1", nps_setup_clocksource); #ifdef CONFIG_EZNPS_MTM_EXT @@ -279,6 +279,6 @@ static int __init nps_setup_clockevent(struct device_node *node) return 0; } -CLOCKSOURCE_OF_DECLARE(ezchip_nps400_clk_evt, "ezchip,nps400-timer0", +TIMER_OF_DECLARE(ezchip_nps400_clk_evt, "ezchip,nps400-timer0", nps_setup_clockevent); #endif /* CONFIG_EZNPS_MTM_EXT */ diff --git a/drivers/clocksource/timer-oxnas-rps.c b/drivers/clocksource/timer-oxnas-rps.c index d630bf417773..eed6feff8b5f 100644 --- a/drivers/clocksource/timer-oxnas-rps.c +++ b/drivers/clocksource/timer-oxnas-rps.c @@ -293,7 +293,7 @@ err_alloc: return ret; } -CLOCKSOURCE_OF_DECLARE(ox810se_rps, +TIMER_OF_DECLARE(ox810se_rps, "oxsemi,ox810se-rps-timer", oxnas_rps_timer_init); -CLOCKSOURCE_OF_DECLARE(ox820_rps, +TIMER_OF_DECLARE(ox820_rps, "oxsemi,ox820se-rps-timer", oxnas_rps_timer_init); diff --git a/drivers/clocksource/timer-prima2.c b/drivers/clocksource/timer-prima2.c index b4122ed1accb..20ff33b698df 100644 --- a/drivers/clocksource/timer-prima2.c +++ b/drivers/clocksource/timer-prima2.c @@ -245,5 +245,5 @@ static int __init sirfsoc_prima2_timer_init(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(sirfsoc_prima2_timer, +TIMER_OF_DECLARE(sirfsoc_prima2_timer, "sirf,prima2-tick", sirfsoc_prima2_timer_init); diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c index 2d575a8c0939..3ac9dec9a038 100644 --- a/drivers/clocksource/timer-sp804.c +++ b/drivers/clocksource/timer-sp804.c @@ -287,7 +287,7 @@ err: iounmap(base); return ret; } -CLOCKSOURCE_OF_DECLARE(sp804, "arm,sp804", sp804_of_init); +TIMER_OF_DECLARE(sp804, "arm,sp804", sp804_of_init); static int __init integrator_cp_of_init(struct device_node *np) { @@ -335,4 +335,4 @@ err: iounmap(base); return ret; } -CLOCKSOURCE_OF_DECLARE(intcp, "arm,integrator-cp-timer", integrator_cp_of_init); +TIMER_OF_DECLARE(intcp, "arm,integrator-cp-timer", integrator_cp_of_init); diff --git a/drivers/clocksource/timer-stm32.c b/drivers/clocksource/timer-stm32.c index 1b2574c4fb97..174d1243ea93 100644 --- a/drivers/clocksource/timer-stm32.c +++ b/drivers/clocksource/timer-stm32.c @@ -187,4 +187,4 @@ err_clk_get: return ret; } -CLOCKSOURCE_OF_DECLARE(stm32, "st,stm32-timer", stm32_clockevent_init); +TIMER_OF_DECLARE(stm32, "st,stm32-timer", stm32_clockevent_init); diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c index 2e9c830ae1cd..a4ebc8ff8f91 100644 --- a/drivers/clocksource/timer-sun5i.c +++ b/drivers/clocksource/timer-sun5i.c @@ -358,7 +358,7 @@ static int __init sun5i_timer_init(struct device_node *node) return sun5i_setup_clockevent(node, timer_base, clk, irq); } -CLOCKSOURCE_OF_DECLARE(sun5i_a13, "allwinner,sun5i-a13-hstimer", +TIMER_OF_DECLARE(sun5i_a13, "allwinner,sun5i-a13-hstimer", sun5i_timer_init); -CLOCKSOURCE_OF_DECLARE(sun7i_a20, "allwinner,sun7i-a20-hstimer", +TIMER_OF_DECLARE(sun7i_a20, "allwinner,sun7i-a20-hstimer", sun5i_timer_init); diff --git a/drivers/clocksource/timer-ti-32k.c b/drivers/clocksource/timer-ti-32k.c index 624067712ef0..880a861ab3c8 100644 --- a/drivers/clocksource/timer-ti-32k.c +++ b/drivers/clocksource/timer-ti-32k.c @@ -124,5 +124,5 @@ static int __init ti_32k_timer_init(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(ti_32k_timer, "ti,omap-counter32k", +TIMER_OF_DECLARE(ti_32k_timer, "ti,omap-counter32k", ti_32k_timer_init); diff --git a/drivers/clocksource/timer-u300.c b/drivers/clocksource/timer-u300.c index 704e40c6f151..be34b116d4d2 100644 --- a/drivers/clocksource/timer-u300.c +++ b/drivers/clocksource/timer-u300.c @@ -458,5 +458,5 @@ static int __init u300_timer_init_of(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(u300_timer, "stericsson,u300-apptimer", +TIMER_OF_DECLARE(u300_timer, "stericsson,u300-apptimer", u300_timer_init_of); diff --git a/drivers/clocksource/versatile.c b/drivers/clocksource/versatile.c index 220b490a8142..39725d38aede 100644 --- a/drivers/clocksource/versatile.c +++ b/drivers/clocksource/versatile.c @@ -38,7 +38,7 @@ static int __init versatile_sched_clock_init(struct device_node *node) return 0; } -CLOCKSOURCE_OF_DECLARE(vexpress, "arm,vexpress-sysreg", +TIMER_OF_DECLARE(vexpress, "arm,vexpress-sysreg", versatile_sched_clock_init); -CLOCKSOURCE_OF_DECLARE(versatile, "arm,versatile-sysreg", +TIMER_OF_DECLARE(versatile, "arm,versatile-sysreg", versatile_sched_clock_init); diff --git a/drivers/clocksource/vf_pit_timer.c b/drivers/clocksource/vf_pit_timer.c index e0849e20a307..0f92089ec08c 100644 --- a/drivers/clocksource/vf_pit_timer.c +++ b/drivers/clocksource/vf_pit_timer.c @@ -201,4 +201,4 @@ static int __init pit_timer_init(struct device_node *np) return pit_clockevent_init(clk_rate, irq); } -CLOCKSOURCE_OF_DECLARE(vf610, "fsl,vf610-pit", pit_timer_init); +TIMER_OF_DECLARE(vf610, "fsl,vf610-pit", pit_timer_init); diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c index d02b51075ad1..e0f7489cfc8e 100644 --- a/drivers/clocksource/vt8500_timer.c +++ b/drivers/clocksource/vt8500_timer.c @@ -165,4 +165,4 @@ static int __init vt8500_timer_init(struct device_node *np) return 0; } -CLOCKSOURCE_OF_DECLARE(vt8500, "via,vt8500-timer", vt8500_timer_init); +TIMER_OF_DECLARE(vt8500, "via,vt8500-timer", vt8500_timer_init); diff --git a/drivers/clocksource/zevio-timer.c b/drivers/clocksource/zevio-timer.c index 9a53f5ef6157..a6a0338eea77 100644 --- a/drivers/clocksource/zevio-timer.c +++ b/drivers/clocksource/zevio-timer.c @@ -215,4 +215,4 @@ static int __init zevio_timer_init(struct device_node *node) return zevio_timer_add(node); } -CLOCKSOURCE_OF_DECLARE(zevio_timer, "lsi,zevio-timer", zevio_timer_init); +TIMER_OF_DECLARE(zevio_timer, "lsi,zevio-timer", zevio_timer_init); diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index f2b10d9ebd04..a86b65f0a246 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -249,7 +249,7 @@ extern int clocksource_mmio_init(void __iomem *, const char *, extern int clocksource_i8253_init(void); -#define CLOCKSOURCE_OF_DECLARE(name, compat, fn) \ +#define TIMER_OF_DECLARE(name, compat, fn) \ OF_DECLARE_1_RET(clksrc, name, compat, fn) #ifdef CONFIG_CLKSRC_PROBE -- cgit v1.2.3-58-ga151 From ba5d08c0ea785d5710c5a1e7dc3182b7124d63c0 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Fri, 26 May 2017 17:40:46 +0200 Subject: clocksource/drivers: Rename clocksource_probe to timer_probe The function name is now renamed to 'timer_probe' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano Acked-by: Viresh Kumar Acked-by: Heiko Stuebner Reviewed-by: Linus Walleij --- arch/arc/kernel/setup.c | 2 +- arch/arm/kernel/time.c | 2 +- arch/arm/mach-mediatek/mediatek.c | 2 +- arch/arm/mach-omap2/timer.c | 10 +++++----- arch/arm/mach-rockchip/rockchip.c | 2 +- arch/arm/mach-shmobile/setup-rcar-gen2.c | 2 +- arch/arm/mach-spear/spear13xx.c | 2 +- arch/arm/mach-sunxi/sunxi.c | 2 +- arch/arm/mach-u300/core.c | 2 +- arch/arm/mach-zynq/common.c | 2 +- arch/arm64/kernel/time.c | 2 +- arch/h8300/kernel/setup.c | 2 +- arch/microblaze/kernel/setup.c | 2 +- arch/mips/generic/init.c | 2 +- arch/mips/mti-malta/malta-time.c | 2 +- arch/mips/pic32/pic32mzda/time.c | 2 +- arch/mips/pistachio/time.c | 2 +- arch/mips/ralink/clk.c | 2 +- arch/mips/ralink/timer-gic.c | 2 +- arch/mips/xilfpga/time.c | 2 +- arch/nios2/kernel/time.c | 2 +- arch/sh/boards/of-generic.c | 2 +- arch/xtensa/kernel/time.c | 2 +- drivers/clocksource/clksrc-probe.c | 2 +- include/linux/clocksource.h | 4 ++-- 25 files changed, 30 insertions(+), 30 deletions(-) diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c index fc8211f338ad..666613fde91d 100644 --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -470,7 +470,7 @@ void __init setup_arch(char **cmdline_p) void __init time_init(void) { of_clk_init(NULL); - clocksource_probe(); + timer_probe(); } static int __init customize_machine(void) diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c index 97b22fa7cb3a..629f8e9981f1 100644 --- a/arch/arm/kernel/time.c +++ b/arch/arm/kernel/time.c @@ -120,6 +120,6 @@ void __init time_init(void) #ifdef CONFIG_COMMON_CLK of_clk_init(NULL); #endif - clocksource_probe(); + timer_probe(); } } diff --git a/arch/arm/mach-mediatek/mediatek.c b/arch/arm/mach-mediatek/mediatek.c index a6e3c98b95ed..c3cf215773b2 100644 --- a/arch/arm/mach-mediatek/mediatek.c +++ b/arch/arm/mach-mediatek/mediatek.c @@ -41,7 +41,7 @@ static void __init mediatek_timer_init(void) } of_clk_init(NULL); - clocksource_probe(); + timer_probe(); }; static const char * const mediatek_board_dt_compat[] = { diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c index 07dd692c4737..ae4bb9fdc483 100644 --- a/arch/arm/mach-omap2/timer.c +++ b/arch/arm/mach-omap2/timer.c @@ -497,7 +497,7 @@ void __init omap_init_time(void) __omap_sync32k_timer_init(1, "timer_32k_ck", "ti,timer-alwon", 2, "timer_sys_ck", NULL, false); - clocksource_probe(); + timer_probe(); } #if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_SOC_AM43XX) @@ -506,7 +506,7 @@ void __init omap3_secure_sync32k_timer_init(void) __omap_sync32k_timer_init(12, "secure_32k_fck", "ti,timer-secure", 2, "timer_sys_ck", NULL, false); - clocksource_probe(); + timer_probe(); } #endif /* CONFIG_ARCH_OMAP3 */ @@ -517,7 +517,7 @@ void __init omap3_gptimer_timer_init(void) __omap_sync32k_timer_init(2, "timer_sys_ck", NULL, 1, "timer_sys_ck", "ti,timer-alwon", true); if (of_have_populated_dt()) - clocksource_probe(); + timer_probe(); } #endif @@ -532,7 +532,7 @@ static void __init omap4_sync32k_timer_init(void) void __init omap4_local_timer_init(void) { omap4_sync32k_timer_init(); - clocksource_probe(); + timer_probe(); } #endif @@ -656,7 +656,7 @@ void __init omap5_realtime_timer_init(void) omap4_sync32k_timer_init(); realtime_counter_init(); - clocksource_probe(); + timer_probe(); } #endif /* CONFIG_SOC_OMAP5 || CONFIG_SOC_DRA7XX */ diff --git a/arch/arm/mach-rockchip/rockchip.c b/arch/arm/mach-rockchip/rockchip.c index ef0500a4c8ad..5ab834ebcb49 100644 --- a/arch/arm/mach-rockchip/rockchip.c +++ b/arch/arm/mach-rockchip/rockchip.c @@ -55,7 +55,7 @@ static void __init rockchip_timer_init(void) } of_clk_init(NULL); - clocksource_probe(); + timer_probe(); } static void __init rockchip_dt_init(void) diff --git a/arch/arm/mach-shmobile/setup-rcar-gen2.c b/arch/arm/mach-shmobile/setup-rcar-gen2.c index 52d466b75973..a6e74f481dea 100644 --- a/arch/arm/mach-shmobile/setup-rcar-gen2.c +++ b/arch/arm/mach-shmobile/setup-rcar-gen2.c @@ -113,7 +113,7 @@ void __init rcar_gen2_timer_init(void) #endif /* CONFIG_ARM_ARCH_TIMER */ of_clk_init(NULL); - clocksource_probe(); + timer_probe(); } struct memory_reserve_config { diff --git a/arch/arm/mach-spear/spear13xx.c b/arch/arm/mach-spear/spear13xx.c index ca2f6a82a414..31c43cabf362 100644 --- a/arch/arm/mach-spear/spear13xx.c +++ b/arch/arm/mach-spear/spear13xx.c @@ -124,5 +124,5 @@ void __init spear13xx_timer_init(void) clk_put(pclk); spear_setup_of_timer(); - clocksource_probe(); + timer_probe(); } diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c index f44e3acb5c90..7ab353fb25f2 100644 --- a/arch/arm/mach-sunxi/sunxi.c +++ b/arch/arm/mach-sunxi/sunxi.c @@ -42,7 +42,7 @@ static void __init sun6i_timer_init(void) of_clk_init(NULL); if (IS_ENABLED(CONFIG_RESET_CONTROLLER)) sun6i_reset_init(); - clocksource_probe(); + timer_probe(); } DT_MACHINE_START(SUN6I_DT, "Allwinner sun6i (A31) Family") diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c index a4910ea6811a..048f15e8c669 100644 --- a/arch/arm/mach-u300/core.c +++ b/arch/arm/mach-u300/core.c @@ -407,7 +407,7 @@ static const char * u300_board_compat[] = { DT_MACHINE_START(U300_DT, "U300 S335/B335 (Device Tree)") .map_io = u300_map_io, .init_irq = u300_init_irq_dt, - .init_time = clocksource_probe, + .init_time = timer_probe, .init_machine = u300_init_machine_dt, .restart = u300_restart, .dt_compat = u300_board_compat, diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c index ed118648313f..6aba9ebf8041 100644 --- a/arch/arm/mach-zynq/common.c +++ b/arch/arm/mach-zynq/common.c @@ -150,7 +150,7 @@ static void __init zynq_timer_init(void) { zynq_clock_init(); of_clk_init(NULL); - clocksource_probe(); + timer_probe(); } static struct map_desc zynq_cortex_a9_scu_map __initdata = { diff --git a/arch/arm64/kernel/time.c b/arch/arm64/kernel/time.c index 59779699a1a4..da33c90248e9 100644 --- a/arch/arm64/kernel/time.c +++ b/arch/arm64/kernel/time.c @@ -70,7 +70,7 @@ void __init time_init(void) u32 arch_timer_rate; of_clk_init(NULL); - clocksource_probe(); + timer_probe(); tick_setup_hrtimer_broadcast(); diff --git a/arch/h8300/kernel/setup.c b/arch/h8300/kernel/setup.c index c8c25a4e9e48..6be15d634650 100644 --- a/arch/h8300/kernel/setup.c +++ b/arch/h8300/kernel/setup.c @@ -246,5 +246,5 @@ void __init calibrate_delay(void) void __init time_init(void) { of_clk_init(NULL); - clocksource_probe(); + timer_probe(); } diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c index f31ebb5dc26c..be98ffe28ca8 100644 --- a/arch/microblaze/kernel/setup.c +++ b/arch/microblaze/kernel/setup.c @@ -192,7 +192,7 @@ void __init time_init(void) { of_clk_init(NULL); setup_cpuinfo_clk(); - clocksource_probe(); + timer_probe(); } #ifdef CONFIG_DEBUG_FS diff --git a/arch/mips/generic/init.c b/arch/mips/generic/init.c index 4af619215410..1231b5a17b37 100644 --- a/arch/mips/generic/init.c +++ b/arch/mips/generic/init.c @@ -161,7 +161,7 @@ void __init plat_time_init(void) } } - clocksource_probe(); + timer_probe(); } void __init arch_init_irq(void) diff --git a/arch/mips/mti-malta/malta-time.c b/arch/mips/mti-malta/malta-time.c index 289edcfadd7c..cea4ec909806 100644 --- a/arch/mips/mti-malta/malta-time.c +++ b/arch/mips/mti-malta/malta-time.c @@ -265,7 +265,7 @@ void __init plat_time_init(void) (freq%1000000)*100/1000000); #ifdef CONFIG_CLKSRC_MIPS_GIC update_gic_frequency_dt(); - clocksource_probe(); + timer_probe(); #endif } #endif diff --git a/arch/mips/pic32/pic32mzda/time.c b/arch/mips/pic32/pic32mzda/time.c index 62a0a78b6c64..1894e50939b5 100644 --- a/arch/mips/pic32/pic32mzda/time.c +++ b/arch/mips/pic32/pic32mzda/time.c @@ -64,5 +64,5 @@ void __init plat_time_init(void) pr_info("CPU Clock: %ldMHz\n", rate / 1000000); mips_hpt_frequency = rate / 2; - clocksource_probe(); + timer_probe(); } diff --git a/arch/mips/pistachio/time.c b/arch/mips/pistachio/time.c index 1022201b2beb..17a0f1dec05b 100644 --- a/arch/mips/pistachio/time.c +++ b/arch/mips/pistachio/time.c @@ -39,7 +39,7 @@ void __init plat_time_init(void) struct clk *clk; of_clk_init(NULL); - clocksource_probe(); + timer_probe(); np = of_get_cpu_node(0, NULL); if (!np) { diff --git a/arch/mips/ralink/clk.c b/arch/mips/ralink/clk.c index df795885eace..eb1c61917eb7 100644 --- a/arch/mips/ralink/clk.c +++ b/arch/mips/ralink/clk.c @@ -82,5 +82,5 @@ void __init plat_time_init(void) pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000); mips_hpt_frequency = clk_get_rate(clk) / 2; clk_put(clk); - clocksource_probe(); + timer_probe(); } diff --git a/arch/mips/ralink/timer-gic.c b/arch/mips/ralink/timer-gic.c index 069771dbec42..b5f07d21fcf2 100644 --- a/arch/mips/ralink/timer-gic.c +++ b/arch/mips/ralink/timer-gic.c @@ -20,5 +20,5 @@ void __init plat_time_init(void) ralink_of_remap(); of_clk_init(NULL); - clocksource_probe(); + timer_probe(); } diff --git a/arch/mips/xilfpga/time.c b/arch/mips/xilfpga/time.c index cbb3fca7b6fa..36f3f1870ee2 100644 --- a/arch/mips/xilfpga/time.c +++ b/arch/mips/xilfpga/time.c @@ -22,7 +22,7 @@ void __init plat_time_init(void) struct clk *clk; of_clk_init(NULL); - clocksource_probe(); + timer_probe(); np = of_get_cpu_node(0, NULL); if (!np) { diff --git a/arch/nios2/kernel/time.c b/arch/nios2/kernel/time.c index 2954b6617378..645129aaa9a0 100644 --- a/arch/nios2/kernel/time.c +++ b/arch/nios2/kernel/time.c @@ -350,7 +350,7 @@ void __init time_init(void) if (count < 2) panic("%d timer is found, it needs 2 timers in system\n", count); - clocksource_probe(); + timer_probe(); } TIMER_OF_DECLARE(nios2_timer, ALTR_TIMER_COMPATIBLE, nios2_time_init); diff --git a/arch/sh/boards/of-generic.c b/arch/sh/boards/of-generic.c index 1fb6d5714bae..4feb7c86f4ac 100644 --- a/arch/sh/boards/of-generic.c +++ b/arch/sh/boards/of-generic.c @@ -119,7 +119,7 @@ static void __init sh_of_mem_reserve(void) static void __init sh_of_time_init(void) { pr_info("SH generic board support: scanning for clocksource devices\n"); - clocksource_probe(); + timer_probe(); } static void __init sh_of_setup(char **cmdline_p) diff --git a/arch/xtensa/kernel/time.c b/arch/xtensa/kernel/time.c index 668c1056f9e4..fd524a54d2ab 100644 --- a/arch/xtensa/kernel/time.c +++ b/arch/xtensa/kernel/time.c @@ -187,7 +187,7 @@ void __init time_init(void) local_timer_setup(0); setup_irq(this_cpu_ptr(&ccount_timer)->evt.irq, &timer_irqaction); sched_clock_register(ccount_sched_clock_read, 32, ccount_freq); - clocksource_probe(); + timer_probe(); } /* diff --git a/drivers/clocksource/clksrc-probe.c b/drivers/clocksource/clksrc-probe.c index ac701ffb8d59..5d549c2a65fe 100644 --- a/drivers/clocksource/clksrc-probe.c +++ b/drivers/clocksource/clksrc-probe.c @@ -24,7 +24,7 @@ extern struct of_device_id __clksrc_of_table[]; static const struct of_device_id __clksrc_of_table_sentinel __used __section(__clksrc_of_table_end); -void __init clocksource_probe(void) +void __init timer_probe(void) { struct device_node *np; const struct of_device_id *match; diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index a86b65f0a246..010bb9f60db2 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -253,9 +253,9 @@ extern int clocksource_i8253_init(void); OF_DECLARE_1_RET(clksrc, name, compat, fn) #ifdef CONFIG_CLKSRC_PROBE -extern void clocksource_probe(void); +extern void timer_probe(void); #else -static inline void clocksource_probe(void) {} +static inline void timer_probe(void) {} #endif #define CLOCKSOURCE_ACPI_DECLARE(name, table_id, fn) \ -- cgit v1.2.3-58-ga151 From 77d62f532282010d5859a99819d6a0c233bfcfff Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Fri, 26 May 2017 17:42:25 +0200 Subject: clocksource/drivers: Rename CLOCKSOURCE_ACPI_DECLARE to TIMER_ACPI_DECLARE The macro name is now renamed to 'TIMER_ACPI_DECLARE' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano Reviewed-by: Linus Walleij --- drivers/clocksource/arm_arch_timer.c | 2 +- include/linux/clocksource.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index bc60cd78698e..a89d41cff915 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -1516,5 +1516,5 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table) return arch_timer_common_init(); } -CLOCKSOURCE_ACPI_DECLARE(arch_timer, ACPI_SIG_GTDT, arch_timer_acpi_init); +TIMER_ACPI_DECLARE(arch_timer, ACPI_SIG_GTDT, arch_timer_acpi_init); #endif diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index 010bb9f60db2..e43f37f9a1b6 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -258,7 +258,7 @@ extern void timer_probe(void); static inline void timer_probe(void) {} #endif -#define CLOCKSOURCE_ACPI_DECLARE(name, table_id, fn) \ +#define TIMER_ACPI_DECLARE(name, table_id, fn) \ ACPI_DECLARE_PROBE_ENTRY(clksrc, name, table_id, 0, NULL, 0, fn) #endif /* _LINUX_CLOCKSOURCE_H */ -- cgit v1.2.3-58-ga151 From 2fcc112af37fa88f8da077d6dd3bb8e38e75adb1 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Fri, 26 May 2017 18:33:27 +0200 Subject: clocksource/drivers: Rename clksrc table to timer The table name is now renamed to 'timer' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano Reviewed-by: Linus Walleij --- drivers/clocksource/clksrc-probe.c | 18 +++++++++--------- include/asm-generic/vmlinux.lds.h | 7 ++++--- include/linux/clocksource.h | 4 ++-- 3 files changed, 15 insertions(+), 14 deletions(-) diff --git a/drivers/clocksource/clksrc-probe.c b/drivers/clocksource/clksrc-probe.c index 5d549c2a65fe..da81e5de74fe 100644 --- a/drivers/clocksource/clksrc-probe.c +++ b/drivers/clocksource/clksrc-probe.c @@ -19,20 +19,20 @@ #include #include -extern struct of_device_id __clksrc_of_table[]; +extern struct of_device_id __timer_of_table[]; -static const struct of_device_id __clksrc_of_table_sentinel - __used __section(__clksrc_of_table_end); +static const struct of_device_id __timer_of_table_sentinel + __used __section(__timer_of_table_end); void __init timer_probe(void) { struct device_node *np; const struct of_device_id *match; of_init_fn_1_ret init_func_ret; - unsigned clocksources = 0; + unsigned timers = 0; int ret; - for_each_matching_node_and_match(np, __clksrc_of_table, &match) { + for_each_matching_node_and_match(np, __timer_of_table, &match) { if (!of_device_is_available(np)) continue; @@ -45,11 +45,11 @@ void __init timer_probe(void) continue; } - clocksources++; + timers++; } - clocksources += acpi_probe_device_table(clksrc); + timers += acpi_probe_device_table(timer); - if (!clocksources) - pr_crit("%s: no matching clocksources found\n", __func__); + if (!timers) + pr_crit("%s: no matching timers found\n", __func__); } diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 401d324bcede..c6a4ef50bbe6 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -172,7 +172,7 @@ KEEP(*(__##name##_of_table)) \ KEEP(*(__##name##_of_table_end)) -#define CLKSRC_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, clksrc) +#define TIMER_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, timer) #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) #define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu) @@ -556,14 +556,15 @@ MEM_DISCARD(init.rodata) \ CLK_OF_TABLES() \ RESERVEDMEM_OF_TABLES() \ - CLKSRC_OF_TABLES() \ + TIMER_OF_TABLES() \ IOMMU_OF_TABLES() \ CPU_METHOD_OF_TABLES() \ CPUIDLE_METHOD_OF_TABLES() \ KERNEL_DTB() \ IRQCHIP_OF_MATCH_TABLE() \ ACPI_PROBE_TABLE(irqchip) \ - ACPI_PROBE_TABLE(clksrc) \ + ACPI_PROBE_TABLE(timer) \ + ACPI_PROBE_TABLE(iort) \ EARLYCON_TABLE() #define INIT_TEXT \ diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index e43f37f9a1b6..7cd38b21cbd3 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -250,7 +250,7 @@ extern int clocksource_mmio_init(void __iomem *, const char *, extern int clocksource_i8253_init(void); #define TIMER_OF_DECLARE(name, compat, fn) \ - OF_DECLARE_1_RET(clksrc, name, compat, fn) + OF_DECLARE_1_RET(timer, name, compat, fn) #ifdef CONFIG_CLKSRC_PROBE extern void timer_probe(void); @@ -259,6 +259,6 @@ static inline void timer_probe(void) {} #endif #define TIMER_ACPI_DECLARE(name, table_id, fn) \ - ACPI_DECLARE_PROBE_ENTRY(clksrc, name, table_id, 0, NULL, 0, fn) + ACPI_DECLARE_PROBE_ENTRY(timer, name, table_id, 0, NULL, 0, fn) #endif /* _LINUX_CLOCKSOURCE_H */ -- cgit v1.2.3-58-ga151 From bb0eb050a577a866cb47c2dc37596f1207f4c2d9 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Fri, 26 May 2017 19:34:11 +0200 Subject: clocksource/drivers: Rename CLKSRC_OF to TIMER_OF The config option name is now renamed to 'TIMER_OF' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano Reviewed-by: Linus Walleij --- arch/arm/Kconfig | 10 +++--- arch/arm/mach-bcm/Kconfig | 2 +- arch/arm/mach-clps711x/Kconfig | 2 +- arch/arm/mach-s3c24xx/Kconfig | 2 +- arch/arm/mach-s3c64xx/Kconfig | 2 +- arch/arm64/Kconfig.platforms | 4 +-- arch/h8300/Kconfig | 2 +- arch/microblaze/Kconfig | 2 +- arch/mips/ralink/Kconfig | 2 +- arch/nios2/Kconfig | 2 +- arch/sh/boards/Kconfig | 2 +- drivers/clocksource/Kconfig | 60 ++++++++++++++++----------------- drivers/clocksource/Makefile | 2 +- drivers/clocksource/clksrc-probe.c | 55 ------------------------------ drivers/clocksource/clps711x-timer.c | 2 +- drivers/clocksource/samsung_pwm_timer.c | 2 +- drivers/clocksource/timer-probe.c | 55 ++++++++++++++++++++++++++++++ include/asm-generic/vmlinux.lds.h | 2 +- include/linux/clocksource.h | 2 +- 19 files changed, 106 insertions(+), 106 deletions(-) delete mode 100644 drivers/clocksource/clksrc-probe.c create mode 100644 drivers/clocksource/timer-probe.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 4c1a35f15838..1c7e165b0a93 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -337,7 +337,7 @@ config ARCH_MULTIPLATFORM select ARM_HAS_SG_CHAIN select ARM_PATCH_PHYS_VIRT select AUTO_ZRELADDR - select CLKSRC_OF + select TIMER_OF select COMMON_CLK select GENERIC_CLOCKEVENTS select MIGHT_HAVE_PCI @@ -351,7 +351,7 @@ config ARM_SINGLE_ARMV7M depends on !MMU select ARM_NVIC select AUTO_ZRELADDR - select CLKSRC_OF + select TIMER_OF select COMMON_CLK select CPU_V7M select GENERIC_CLOCKEVENTS @@ -532,7 +532,7 @@ config ARCH_PXA select CLKDEV_LOOKUP select CLKSRC_PXA select CLKSRC_MMIO - select CLKSRC_OF + select TIMER_OF select CPU_XSCALE if !CPU_XSC3 select GENERIC_CLOCKEVENTS select GPIO_PXA @@ -571,7 +571,7 @@ config ARCH_SA1100 select CLKDEV_LOOKUP select CLKSRC_MMIO select CLKSRC_PXA - select CLKSRC_OF if OF + select TIMER_OF if OF select CPU_FREQ select CPU_SA1100 select GENERIC_CLOCKEVENTS @@ -1357,7 +1357,7 @@ config HAVE_ARM_ARCH_TIMER config HAVE_ARM_TWD bool - select CLKSRC_OF if OF + select TIMER_OF if OF help This options enables support for the ARM timer and watchdog unit diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig index f9389c5910e7..f23a23934162 100644 --- a/arch/arm/mach-bcm/Kconfig +++ b/arch/arm/mach-bcm/Kconfig @@ -150,7 +150,7 @@ config ARCH_BCM2835 select ARM_ERRATA_411920 if ARCH_MULTI_V6 select ARM_TIMER_SP804 select HAVE_ARM_ARCH_TIMER if ARCH_MULTI_V7 - select CLKSRC_OF + select TIMER_OF select BCM2835_TIMER select PINCTRL select PINCTRL_BCM2835 diff --git a/arch/arm/mach-clps711x/Kconfig b/arch/arm/mach-clps711x/Kconfig index 61284b9389cf..f385b1fcafef 100644 --- a/arch/arm/mach-clps711x/Kconfig +++ b/arch/arm/mach-clps711x/Kconfig @@ -2,7 +2,7 @@ menuconfig ARCH_CLPS711X bool "Cirrus Logic EP721x/EP731x-based" depends on ARCH_MULTI_V4T select AUTO_ZRELADDR - select CLKSRC_OF + select TIMER_OF select CLPS711X_TIMER select COMMON_CLK select CPU_ARM720T diff --git a/arch/arm/mach-s3c24xx/Kconfig b/arch/arm/mach-s3c24xx/Kconfig index 4b1690acb6a5..f07da82ebfea 100644 --- a/arch/arm/mach-s3c24xx/Kconfig +++ b/arch/arm/mach-s3c24xx/Kconfig @@ -394,7 +394,7 @@ config MACH_SMDK2416 config MACH_S3C2416_DT bool "Samsung S3C2416 machine using devicetree" - select CLKSRC_OF + select TIMER_OF select USE_OF select PINCTRL select PINCTRL_S3C24XX diff --git a/arch/arm/mach-s3c64xx/Kconfig b/arch/arm/mach-s3c64xx/Kconfig index 459214fa20b4..71a49343d711 100644 --- a/arch/arm/mach-s3c64xx/Kconfig +++ b/arch/arm/mach-s3c64xx/Kconfig @@ -336,7 +336,7 @@ config MACH_WLF_CRAGG_6410 config MACH_S3C64XX_DT bool "Samsung S3C6400/S3C6410 machine using Device Tree" - select CLKSRC_OF + select TIMER_OF select CPU_S3C6400 select CPU_S3C6410 select PINCTRL diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms index 73272f43ca01..9ed0a659046b 100644 --- a/arch/arm64/Kconfig.platforms +++ b/arch/arm64/Kconfig.platforms @@ -18,7 +18,7 @@ config ARCH_ALPINE config ARCH_BCM2835 bool "Broadcom BCM2835 family" - select CLKSRC_OF + select TIMER_OF select GPIOLIB select PINCTRL select PINCTRL_BCM2835 @@ -178,7 +178,7 @@ config ARCH_TEGRA select ARCH_HAS_RESET_CONTROLLER select CLKDEV_LOOKUP select CLKSRC_MMIO - select CLKSRC_OF + select TIMER_OF select GENERIC_CLOCKEVENTS select GPIOLIB select PINCTRL diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 3ae852507e57..6e3d36f37a02 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -15,7 +15,7 @@ config H8300 select OF_IRQ select OF_EARLY_FLATTREE select HAVE_MEMBLOCK - select CLKSRC_OF + select TIMER_OF select H8300_TMR8 select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 85885a501dce..8e47121b8b8b 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -4,7 +4,7 @@ config MICROBLAZE select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_WANT_IPC_PARSE_VERSION select BUILDTIME_EXTABLE_SORT - select CLKSRC_OF + select TIMER_OF select CLONE_BACKWARDS3 select COMMON_CLK select GENERIC_ATOMIC64 diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig index 9825dee10bc1..710b04cf4851 100644 --- a/arch/mips/ralink/Kconfig +++ b/arch/mips/ralink/Kconfig @@ -4,7 +4,7 @@ config CLKEVT_RT3352 bool depends on SOC_RT305X || SOC_MT7620 default y - select CLKSRC_OF + select TIMER_OF select CLKSRC_MMIO config RALINK_ILL_ACC diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig index a72d5f0de692..c587764b9c5a 100644 --- a/arch/nios2/Kconfig +++ b/arch/nios2/Kconfig @@ -1,6 +1,6 @@ config NIOS2 def_bool y - select CLKSRC_OF + select TIMER_OF select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS select GENERIC_CPU_DEVICES diff --git a/arch/sh/boards/Kconfig b/arch/sh/boards/Kconfig index 4e21949593cf..3554fcaa023b 100644 --- a/arch/sh/boards/Kconfig +++ b/arch/sh/boards/Kconfig @@ -10,7 +10,7 @@ config SH_DEVICE_TREE bool "Board Described by Device Tree" select OF select OF_EARLY_FLATTREE - select CLKSRC_OF + select TIMER_OF select COMMON_CLK select GENERIC_CALIBRATE_DELAY help diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 623fcc69e9a1..90f062ec1779 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -1,15 +1,15 @@ menu "Clock Source drivers" depends on !ARCH_USES_GETTIMEOFFSET -config CLKSRC_OF +config TIMER_OF bool - select CLKSRC_PROBE + select TIMER_PROBE config CLKSRC_ACPI bool - select CLKSRC_PROBE + select TIMER_PROBE -config CLKSRC_PROBE +config TIMER_PROBE bool config CLKSRC_I8253 @@ -58,14 +58,14 @@ config DW_APB_TIMER config DW_APB_TIMER_OF bool select DW_APB_TIMER - select CLKSRC_OF + select TIMER_OF config FTTMR010_TIMER bool "Faraday Technology timer driver" if COMPILE_TEST depends on GENERIC_CLOCKEVENTS depends on HAS_IOMEM select CLKSRC_MMIO - select CLKSRC_OF + select TIMER_OF select MFD_SYSCON help Enables support for the Faraday Technology timer block @@ -74,7 +74,7 @@ config FTTMR010_TIMER config ROCKCHIP_TIMER bool "Rockchip timer driver" if COMPILE_TEST depends on ARM || ARM64 - select CLKSRC_OF + select TIMER_OF select CLKSRC_MMIO help Enables the support for the rockchip timer driver. @@ -82,7 +82,7 @@ config ROCKCHIP_TIMER config ARMADA_370_XP_TIMER bool "Armada 370 and XP timer driver" if COMPILE_TEST depends on ARM - select CLKSRC_OF + select TIMER_OF select CLKSRC_MMIO help Enables the support for the Armada 370 and XP timer driver. @@ -97,7 +97,7 @@ config MESON6_TIMER config ORION_TIMER bool "Orion timer driver" if COMPILE_TEST depends on ARM - select CLKSRC_OF + select TIMER_OF select CLKSRC_MMIO help Enables the support for the Orion timer driver @@ -141,7 +141,7 @@ config ASM9260_TIMER bool "ASM9260 timer driver" if COMPILE_TEST depends on GENERIC_CLOCKEVENTS select CLKSRC_MMIO - select CLKSRC_OF + select TIMER_OF help Enables support for the ASM9260 timer. @@ -247,21 +247,21 @@ config CLKSRC_LPC32XX depends on GENERIC_CLOCKEVENTS && HAS_IOMEM depends on ARM select CLKSRC_MMIO - select CLKSRC_OF + select TIMER_OF help Support for the LPC32XX clocksource. config CLKSRC_PISTACHIO bool "Clocksource for Pistachio SoC" if COMPILE_TEST depends on HAS_IOMEM - select CLKSRC_OF + select TIMER_OF help Enables the clocksource for the Pistachio SoC. config CLKSRC_TI_32K bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST depends on GENERIC_SCHED_CLOCK - select CLKSRC_OF if OF + select TIMER_OF if OF help This option enables support for Texas Instruments 32.768 Hz clocksource available on many OMAP-like platforms. @@ -270,7 +270,7 @@ config CLKSRC_NPS bool "NPS400 clocksource driver" if COMPILE_TEST depends on !PHYS_ADDR_T_64BIT select CLKSRC_MMIO - select CLKSRC_OF if OF + select TIMER_OF if OF help NPS400 clocksource support. Got 64 bit counter with update rate up to 1000MHz. @@ -285,12 +285,12 @@ config CLKSRC_MPS2 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST depends on GENERIC_SCHED_CLOCK select CLKSRC_MMIO - select CLKSRC_OF + select TIMER_OF config ARC_TIMERS bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST depends on GENERIC_CLOCKEVENTS - select CLKSRC_OF + select TIMER_OF help These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores (ARC700 as well as ARC HS38). @@ -300,7 +300,7 @@ config ARC_TIMERS_64BIT bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST depends on GENERIC_CLOCKEVENTS depends on ARC_TIMERS - select CLKSRC_OF + select TIMER_OF help This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP) RTC is implemented inside the core, while GFRC sits outside the core in @@ -309,7 +309,7 @@ config ARC_TIMERS_64BIT config ARM_ARCH_TIMER bool - select CLKSRC_OF if OF + select TIMER_OF if OF select CLKSRC_ACPI if ACPI config ARM_ARCH_TIMER_EVTSTREAM @@ -367,7 +367,7 @@ config ARM64_ERRATUM_858921 config ARM_GLOBAL_TIMER bool "Support for the ARM global timer" if COMPILE_TEST - select CLKSRC_OF if OF + select TIMER_OF if OF depends on ARM help This options enables support for the ARM global timer unit @@ -376,7 +376,7 @@ config ARM_TIMER_SP804 bool "Support for Dual Timer SP804 module" depends on GENERIC_SCHED_CLOCK && CLKDEV_LOOKUP select CLKSRC_MMIO - select CLKSRC_OF if OF + select TIMER_OF if OF config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK bool @@ -387,19 +387,19 @@ config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK config ARMV7M_SYSTICK bool "Support for the ARMv7M system time" if COMPILE_TEST - select CLKSRC_OF if OF + select TIMER_OF if OF select CLKSRC_MMIO help This options enables support for the ARMv7M system timer unit config ATMEL_PIT - select CLKSRC_OF if OF + select TIMER_OF if OF def_bool SOC_AT91SAM9 || SOC_SAMA5 config ATMEL_ST bool "Atmel ST timer support" if COMPILE_TEST depends on GENERIC_CLOCKEVENTS - select CLKSRC_OF + select TIMER_OF select MFD_SYSCON help Support for the Atmel ST timer. @@ -442,7 +442,7 @@ config VF_PIT_TIMER config OXNAS_RPS_TIMER bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST depends on GENERIC_CLOCKEVENTS - select CLKSRC_OF + select TIMER_OF select CLKSRC_MMIO help This enables support for the Oxford Semiconductor OXNAS RPS timers. @@ -453,7 +453,7 @@ config SYS_SUPPORTS_SH_CMT config MTK_TIMER bool "Mediatek timer driver" if COMPILE_TEST depends on GENERIC_CLOCKEVENTS && HAS_IOMEM - select CLKSRC_OF + select TIMER_OF select CLKSRC_MMIO help Support for Mediatek timer driver. @@ -526,7 +526,7 @@ config EM_TIMER_STI config CLKSRC_QCOM bool "Qualcomm MSM timer" if COMPILE_TEST depends on ARM - select CLKSRC_OF + select TIMER_OF help This enables the clocksource and the per CPU clockevent driver for the Qualcomm SoCs. @@ -534,7 +534,7 @@ config CLKSRC_QCOM config CLKSRC_VERSATILE bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET - select CLKSRC_OF + select TIMER_OF default y if MFD_VEXPRESS_SYSREG help This option enables clock source based on free running @@ -545,12 +545,12 @@ config CLKSRC_VERSATILE config CLKSRC_MIPS_GIC bool depends on MIPS_GIC - select CLKSRC_OF + select TIMER_OF config CLKSRC_TANGO_XTAL bool "Clocksource for Tango SoC" if COMPILE_TEST depends on ARM - select CLKSRC_OF + select TIMER_OF select CLKSRC_MMIO help This enables the clocksource for Tango SoC @@ -591,7 +591,7 @@ config CLKSRC_IMX_GPT config CLKSRC_ST_LPC bool "Low power clocksource found in the LPC" if COMPILE_TEST - select CLKSRC_OF if OF + select TIMER_OF if OF depends on HAS_IOMEM select CLKSRC_MMIO help diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index cad713c53e7f..ec559212edf6 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -1,4 +1,4 @@ -obj-$(CONFIG_CLKSRC_PROBE) += clksrc-probe.o +obj-$(CONFIG_TIMER_PROBE) += timer-probe.o obj-$(CONFIG_ATMEL_PIT) += timer-atmel-pit.o obj-$(CONFIG_ATMEL_ST) += timer-atmel-st.o obj-$(CONFIG_ATMEL_TCB_CLKSRC) += tcb_clksrc.o diff --git a/drivers/clocksource/clksrc-probe.c b/drivers/clocksource/clksrc-probe.c deleted file mode 100644 index da81e5de74fe..000000000000 --- a/drivers/clocksource/clksrc-probe.c +++ /dev/null @@ -1,55 +0,0 @@ -/* - * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - */ - -#include -#include -#include -#include - -extern struct of_device_id __timer_of_table[]; - -static const struct of_device_id __timer_of_table_sentinel - __used __section(__timer_of_table_end); - -void __init timer_probe(void) -{ - struct device_node *np; - const struct of_device_id *match; - of_init_fn_1_ret init_func_ret; - unsigned timers = 0; - int ret; - - for_each_matching_node_and_match(np, __timer_of_table, &match) { - if (!of_device_is_available(np)) - continue; - - init_func_ret = match->data; - - ret = init_func_ret(np); - if (ret) { - pr_err("Failed to initialize '%s': %d\n", - of_node_full_name(np), ret); - continue; - } - - timers++; - } - - timers += acpi_probe_device_table(timer); - - if (!timers) - pr_crit("%s: no matching timers found\n", __func__); -} diff --git a/drivers/clocksource/clps711x-timer.c b/drivers/clocksource/clps711x-timer.c index fc9e025cc395..a8dd80576c95 100644 --- a/drivers/clocksource/clps711x-timer.c +++ b/drivers/clocksource/clps711x-timer.c @@ -103,7 +103,7 @@ void __init clps711x_clksrc_init(void __iomem *tc1_base, void __iomem *tc2_base, BUG_ON(_clps711x_clkevt_init(tc2, tc2_base, irq)); } -#ifdef CONFIG_CLKSRC_OF +#ifdef CONFIG_TIMER_OF static int __init clps711x_timer_init(struct device_node *np) { unsigned int irq = irq_of_parse_and_map(np, 0); diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c index 21cd72c55a2d..6d5d126357c2 100644 --- a/drivers/clocksource/samsung_pwm_timer.c +++ b/drivers/clocksource/samsung_pwm_timer.c @@ -418,7 +418,7 @@ void __init samsung_pwm_clocksource_init(void __iomem *base, _samsung_pwm_clocksource_init(); } -#ifdef CONFIG_CLKSRC_OF +#ifdef CONFIG_TIMER_OF static int __init samsung_pwm_alloc(struct device_node *np, const struct samsung_pwm_variant *variant) { diff --git a/drivers/clocksource/timer-probe.c b/drivers/clocksource/timer-probe.c new file mode 100644 index 000000000000..da81e5de74fe --- /dev/null +++ b/drivers/clocksource/timer-probe.c @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include + +extern struct of_device_id __timer_of_table[]; + +static const struct of_device_id __timer_of_table_sentinel + __used __section(__timer_of_table_end); + +void __init timer_probe(void) +{ + struct device_node *np; + const struct of_device_id *match; + of_init_fn_1_ret init_func_ret; + unsigned timers = 0; + int ret; + + for_each_matching_node_and_match(np, __timer_of_table, &match) { + if (!of_device_is_available(np)) + continue; + + init_func_ret = match->data; + + ret = init_func_ret(np); + if (ret) { + pr_err("Failed to initialize '%s': %d\n", + of_node_full_name(np), ret); + continue; + } + + timers++; + } + + timers += acpi_probe_device_table(timer); + + if (!timers) + pr_crit("%s: no matching timers found\n", __func__); +} diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index c6a4ef50bbe6..0d64658a224f 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -172,7 +172,7 @@ KEEP(*(__##name##_of_table)) \ KEEP(*(__##name##_of_table_end)) -#define TIMER_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, timer) +#define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) #define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu) diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index 7cd38b21cbd3..c48ceefe0e6e 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -252,7 +252,7 @@ extern int clocksource_i8253_init(void); #define TIMER_OF_DECLARE(name, compat, fn) \ OF_DECLARE_1_RET(timer, name, compat, fn) -#ifdef CONFIG_CLKSRC_PROBE +#ifdef CONFIG_TIMER_PROBE extern void timer_probe(void); #else static inline void timer_probe(void) {} -- cgit v1.2.3-58-ga151 From fa1bffab268723d40ae06e855898f7e8361487e9 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Fri, 26 May 2017 19:40:24 +0200 Subject: clocksource/drivers: Rename CLKSRC_ACPI to TIMER_ACPI The config option name is now renamed to 'TIMER_ACPI' for consistency with the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change. Signed-off-by: Daniel Lezcano Reviewed-by: Linus Walleij --- drivers/clocksource/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 90f062ec1779..4ba230d8e679 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -5,7 +5,7 @@ config TIMER_OF bool select TIMER_PROBE -config CLKSRC_ACPI +config TIMER_ACPI bool select TIMER_PROBE @@ -310,7 +310,7 @@ config ARC_TIMERS_64BIT config ARM_ARCH_TIMER bool select TIMER_OF if OF - select CLKSRC_ACPI if ACPI + select TIMER_ACPI if ACPI config ARM_ARCH_TIMER_EVTSTREAM bool "Enable ARM architected timer event stream generation by default" -- cgit v1.2.3-58-ga151 From 8b7a3b568814a8e36d2910dd74465b0215aa0a31 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 30 May 2017 08:35:40 +0200 Subject: clocksource/drivers: Add an alias macro CLOCKSOURCE_OF_DECLARE The macro CLOCKSOURCE_OF_DECLARE has been rename to TIMER_OF_DECLARE. In order to prevent conflicts for the next merge window, a temporary alias has been added which will be removed later. Cc: Arnd Bergman Signed-off-by: Daniel Lezcano --- include/linux/clocksource.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index c48ceefe0e6e..d92bd83eed9f 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -252,6 +252,9 @@ extern int clocksource_i8253_init(void); #define TIMER_OF_DECLARE(name, compat, fn) \ OF_DECLARE_1_RET(timer, name, compat, fn) +#define CLOCKSOURCE_OF_DECLARE(name, compat, fn) \ + TIMER_OF_DECLARE(name, compat, fn) + #ifdef CONFIG_TIMER_PROBE extern void timer_probe(void); #else -- cgit v1.2.3-58-ga151 From 740e237add571a125f1c2a110ba6aa77db7d2c69 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sun, 11 Jun 2017 23:26:16 +0200 Subject: clocksource/drivers/fttmr010: Optimize sched_clock() The sched_clock() call should be really fast so we want to avoid an extra if() clause on the read path if possible. Implement two sched_clock_read() functions, one if the timer counts up and one if it counts down. Incidentally this also mirrors how clocksource_mmio_init() works and make things simple and easy to understand. Suggested-by: Daniel Lezcano Cc: Andrew Jeffery Cc: Joel Stanley Cc: Jonas Jensen Signed-off-by: Linus Walleij Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-fttmr010.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index a21020c57df6..b56d7bdfcba1 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -91,13 +91,16 @@ static inline struct fttmr010 *to_fttmr010(struct clock_event_device *evt) return container_of(evt, struct fttmr010, clkevt); } -static u64 notrace fttmr010_read_sched_clock(void) +static u64 notrace fttmr010_read_sched_clock_up(void) { - if (local_fttmr->count_down) - return ~readl(local_fttmr->base + TIMER2_COUNT); return readl(local_fttmr->base + TIMER2_COUNT); } +static u64 notrace fttmr010_read_sched_clock_down(void) +{ + return ~readl(local_fttmr->base + TIMER2_COUNT); +} + static int fttmr010_timer_set_next_event(unsigned long cycles, struct clock_event_device *evt) { @@ -302,15 +305,17 @@ static int __init fttmr010_common_init(struct device_node *np, bool is_aspeed) "FTTMR010-TIMER2", fttmr010->tick_rate, 300, 32, clocksource_mmio_readl_down); + sched_clock_register(fttmr010_read_sched_clock_down, 32, + fttmr010->tick_rate); } else { writel(0, fttmr010->base + TIMER2_LOAD); clocksource_mmio_init(fttmr010->base + TIMER2_COUNT, "FTTMR010-TIMER2", fttmr010->tick_rate, 300, 32, clocksource_mmio_readl_up); + sched_clock_register(fttmr010_read_sched_clock_up, 32, + fttmr010->tick_rate); } - sched_clock_register(fttmr010_read_sched_clock, 32, - fttmr010->tick_rate); /* * Setup clockevent timer (interrupt-driven) on timer 1. -- cgit v1.2.3-58-ga151 From 2a515e5d7c52d5cf1e9153cb03efa133e3459c88 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Fri, 12 May 2017 20:22:51 +0200 Subject: clocksource/drivers/tcb_clksrc: Save timer context on suspend/resume On sama5d2, power to the core may be cut while entering suspend mode. It is necessary to save and restore the TCB registers. Signed-off-by: Alexandre Belloni Signed-off-by: Daniel Lezcano --- drivers/clocksource/tcb_clksrc.c | 51 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c index d4ca9962a759..828729c70a0c 100644 --- a/drivers/clocksource/tcb_clksrc.c +++ b/drivers/clocksource/tcb_clksrc.c @@ -9,6 +9,7 @@ #include #include #include +#include #include @@ -40,6 +41,14 @@ */ static void __iomem *tcaddr; +static struct +{ + u32 cmr; + u32 imr; + u32 rc; + bool clken; +} tcb_cache[3]; +static u32 bmr_cache; static u64 tc_get_cycles(struct clocksource *cs) { @@ -61,12 +70,54 @@ static u64 tc_get_cycles32(struct clocksource *cs) return __raw_readl(tcaddr + ATMEL_TC_REG(0, CV)); } +void tc_clksrc_suspend(struct clocksource *cs) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(tcb_cache); i++) { + tcb_cache[i].cmr = readl(tcaddr + ATMEL_TC_REG(i, CMR)); + tcb_cache[i].imr = readl(tcaddr + ATMEL_TC_REG(i, IMR)); + tcb_cache[i].rc = readl(tcaddr + ATMEL_TC_REG(i, RC)); + tcb_cache[i].clken = !!(readl(tcaddr + ATMEL_TC_REG(i, SR)) & + ATMEL_TC_CLKSTA); + } + + bmr_cache = readl(tcaddr + ATMEL_TC_BMR); +} + +void tc_clksrc_resume(struct clocksource *cs) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(tcb_cache); i++) { + /* Restore registers for the channel, RA and RB are not used */ + writel(tcb_cache[i].cmr, tcaddr + ATMEL_TC_REG(i, CMR)); + writel(tcb_cache[i].rc, tcaddr + ATMEL_TC_REG(i, RC)); + writel(0, tcaddr + ATMEL_TC_REG(i, RA)); + writel(0, tcaddr + ATMEL_TC_REG(i, RB)); + /* Disable all the interrupts */ + writel(0xff, tcaddr + ATMEL_TC_REG(i, IDR)); + /* Reenable interrupts that were enabled before suspending */ + writel(tcb_cache[i].imr, tcaddr + ATMEL_TC_REG(i, IER)); + /* Start the clock if it was used */ + if (tcb_cache[i].clken) + writel(ATMEL_TC_CLKEN, tcaddr + ATMEL_TC_REG(i, CCR)); + } + + /* Dual channel, chain channels */ + writel(bmr_cache, tcaddr + ATMEL_TC_BMR); + /* Finally, trigger all the channels*/ + writel(ATMEL_TC_SYNC, tcaddr + ATMEL_TC_BCR); +} + static struct clocksource clksrc = { .name = "tcb_clksrc", .rating = 200, .read = tc_get_cycles, .mask = CLOCKSOURCE_MASK(32), .flags = CLOCK_SOURCE_IS_CONTINUOUS, + .suspend = tc_clksrc_suspend, + .resume = tc_clksrc_resume, }; #ifdef CONFIG_GENERIC_CLOCKEVENTS -- cgit v1.2.3-58-ga151 From dc11bae78529526605c5c45c369c9512fd012093 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Mon, 5 Jun 2017 00:18:43 +0200 Subject: clocksource/drivers: Add timer-of common init routine The different drivers are all using the same pattern when initializing. 1. Get the base address 2. Get the irq number 3. Get the clock 4. Prepare and enable the clock 5. Get the rate 6. Request an interrupt Instead of repeating again and again these steps in all the drivers, let's provide a common init routine to give the opportunity to factor all of them out. We can expect a significant kernel size improvement when the common routine will be used in all the drivers. Signed-off-by: Daniel Lezcano --- drivers/clocksource/Kconfig | 1 + drivers/clocksource/Makefile | 1 + drivers/clocksource/timer-of.c | 172 +++++++++++++++++++++++++++++++++++++++++ drivers/clocksource/timer-of.h | 69 +++++++++++++++++ 4 files changed, 243 insertions(+) create mode 100644 drivers/clocksource/timer-of.c create mode 100644 drivers/clocksource/timer-of.h diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 4ba230d8e679..4be163bca8a8 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -3,6 +3,7 @@ menu "Clock Source drivers" config TIMER_OF bool + depends on GENERIC_CLOCKEVENTS select TIMER_PROBE config TIMER_ACPI diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index ec559212edf6..72bfd001cfbb 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -1,3 +1,4 @@ +obj-$(CONFIG_TIMER_OF) += timer-of.o obj-$(CONFIG_TIMER_PROBE) += timer-probe.o obj-$(CONFIG_ATMEL_PIT) += timer-atmel-pit.o obj-$(CONFIG_ATMEL_ST) += timer-atmel-st.o diff --git a/drivers/clocksource/timer-of.c b/drivers/clocksource/timer-of.c new file mode 100644 index 000000000000..be1dbee11c20 --- /dev/null +++ b/drivers/clocksource/timer-of.c @@ -0,0 +1,172 @@ +/* + * Copyright (c) 2017, Linaro Ltd. All rights reserved. + * + * Author: Daniel Lezcano + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#include +#include +#include +#include +#include +#include + +#include "timer-of.h" + +static __init void timer_irq_exit(struct of_timer_irq *of_irq) +{ + struct timer_of *to = container_of(of_irq, struct timer_of, of_irq); + + struct clock_event_device *clkevt = &to->clkevt; + + of_irq->percpu ? free_percpu_irq(of_irq->irq, clkevt) : + free_irq(of_irq->irq, clkevt); +} + +static __init int timer_irq_init(struct device_node *np, + struct of_timer_irq *of_irq) +{ + int ret; + struct timer_of *to = container_of(of_irq, struct timer_of, of_irq); + struct clock_event_device *clkevt = &to->clkevt; + + of_irq->irq = of_irq->name ? of_irq_get_byname(np, of_irq->name): + irq_of_parse_and_map(np, of_irq->index); + if (!of_irq->irq) { + pr_err("Failed to map interrupt for %s\n", np->full_name); + return -EINVAL; + } + + ret = of_irq->percpu ? + request_percpu_irq(of_irq->irq, of_irq->handler, + np->full_name, clkevt) : + request_irq(of_irq->irq, of_irq->handler, + of_irq->flags ? of_irq->flags : IRQF_TIMER, + np->full_name, clkevt); + if (ret) { + pr_err("Failed to request irq %d for %s\n", of_irq->irq, + np->full_name); + return ret; + } + + clkevt->irq = of_irq->irq; + + return 0; +} + +static __init void timer_clk_exit(struct of_timer_clk *of_clk) +{ + of_clk->rate = 0; + clk_disable_unprepare(of_clk->clk); + clk_put(of_clk->clk); +} + +static __init int timer_clk_init(struct device_node *np, + struct of_timer_clk *of_clk) +{ + int ret; + + of_clk->clk = of_clk->name ? of_clk_get_by_name(np, of_clk->name) : + of_clk_get(np, of_clk->index); + if (IS_ERR(of_clk->clk)) { + pr_err("Failed to get clock for %s\n", np->full_name); + return PTR_ERR(of_clk->clk); + } + + ret = clk_prepare_enable(of_clk->clk); + if (ret) { + pr_err("Failed for enable clock for %s\n", np->full_name); + goto out_clk_put; + } + + of_clk->rate = clk_get_rate(of_clk->clk); + if (!of_clk->rate) { + ret = -EINVAL; + pr_err("Failed to get clock rate for %s\n", np->full_name); + goto out_clk_disable; + } + + of_clk->period = DIV_ROUND_UP(of_clk->rate, HZ); +out: + return ret; + +out_clk_disable: + clk_disable_unprepare(of_clk->clk); +out_clk_put: + clk_put(of_clk->clk); + + goto out; +} + +static __init void timer_base_exit(struct of_timer_base *of_base) +{ + iounmap(of_base->base); +} + +static __init int timer_base_init(struct device_node *np, + struct of_timer_base *of_base) +{ + const char *name = of_base->name ? of_base->name : np->full_name; + + of_base->base = of_io_request_and_map(np, of_base->index, name); + if (of_base->base) { + pr_err("Failed to iomap (%s)\n", name); + return -ENXIO; + } + + return 0; +} + +int __init timer_of_init(struct device_node *np, struct timer_of *to) +{ + int ret; + int flags = 0; + + if (to->flags & TIMER_OF_BASE) { + ret = timer_base_init(np, &to->of_base); + if (ret) + goto out_fail; + flags |= TIMER_OF_BASE; + } + + if (to->flags & TIMER_OF_CLOCK) { + ret = timer_clk_init(np, &to->of_clk); + if (ret) + goto out_fail; + flags |= TIMER_OF_CLOCK; + } + + if (to->flags & TIMER_OF_IRQ) { + ret = timer_irq_init(np, &to->of_irq); + if (ret) + goto out_fail; + flags |= TIMER_OF_IRQ; + } + + if (!to->clkevt.name) + to->clkevt.name = np->name; +out: + return ret; + +out_fail: + if (flags & TIMER_OF_IRQ) + timer_irq_exit(&to->of_irq); + + if (flags & TIMER_OF_CLOCK) + timer_clk_exit(&to->of_clk); + + if (flags & TIMER_OF_BASE) + timer_base_exit(&to->of_base); + goto out; +} diff --git a/drivers/clocksource/timer-of.h b/drivers/clocksource/timer-of.h new file mode 100644 index 000000000000..e0d727255f72 --- /dev/null +++ b/drivers/clocksource/timer-of.h @@ -0,0 +1,69 @@ +#ifndef __TIMER_OF_H__ +#define __TIMER_OF_H__ + +#include + +#define TIMER_OF_BASE 0x1 +#define TIMER_OF_CLOCK 0x2 +#define TIMER_OF_IRQ 0x4 + +struct of_timer_irq { + int irq; + int index; + int percpu; + const char *name; + unsigned long flags; + irq_handler_t handler; +}; + +struct of_timer_base { + void __iomem *base; + const char *name; + int index; +}; + +struct of_timer_clk { + struct clk *clk; + const char *name; + int index; + unsigned long rate; + unsigned long period; +}; + +struct timer_of { + unsigned int flags; + struct clock_event_device clkevt; + struct of_timer_base of_base; + struct of_timer_irq of_irq; + struct of_timer_clk of_clk; + void *private_data; +}; + +static inline struct timer_of *to_timer_of(struct clock_event_device *clkevt) +{ + return container_of(clkevt, struct timer_of, clkevt); +} + +static inline void __iomem *timer_of_base(struct timer_of *to) +{ + return to->of_base.base; +} + +static inline int timer_of_irq(struct timer_of *to) +{ + return to->of_irq.irq; +} + +static inline unsigned long timer_of_rate(struct timer_of *to) +{ + return to->of_clk.rate; +} + +static inline unsigned long timer_of_period(struct timer_of *to) +{ + return to->of_clk.period; +} + +extern int __init timer_of_init(struct device_node *np, + struct timer_of *to); +#endif -- cgit v1.2.3-58-ga151 From 385c98fcc1fb58c3e10157be2203eb37595dac7b Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sun, 11 Jun 2017 23:26:17 +0200 Subject: clocksource/drivers/fttmr010: Implement delay timer This timer is often used on the ARM architecture, so as with so many siblings, we can implement delay timers, removing the need for the system to calibrate jiffys at boot, and potentially handling CPU frequency scaling on targets. We cannot just protect the Kconfig with a "depends on ARM" because it is already known that different architectures are using Faraday IP blocks, so it is better to make things open-ended and use Result on boot dmesg: Switching to timer-based delay loop, resolution 40n Calibrating delay loop (skipped), value calculated using timer frequency.. 50.00 BogoMIPS (lpj=250000) This is accurately the timer frequency, 250MHz on the APB bus. Cc: Andrew Jeffery Cc: Joel Stanley Cc: Jonas Jensen Signed-off-by: Linus Walleij Tested-by: Jonas Jensen Tested-by: Andrew Jeffery Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-fttmr010.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index b56d7bdfcba1..009370460f23 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -17,6 +17,7 @@ #include #include #include +#include /* * Register definitions for the timers @@ -81,9 +82,15 @@ struct fttmr010 { bool count_down; u32 t1_enable_val; struct clock_event_device clkevt; +#ifdef CONFIG_ARM + struct delay_timer delay_timer; +#endif }; -/* A local singleton used by sched_clock, which is stateless */ +/* + * A local singleton used by sched_clock and delay timer reads, which are + * fast and stateless + */ static struct fttmr010 *local_fttmr; static inline struct fttmr010 *to_fttmr010(struct clock_event_device *evt) @@ -101,6 +108,20 @@ static u64 notrace fttmr010_read_sched_clock_down(void) return ~readl(local_fttmr->base + TIMER2_COUNT); } +#ifdef CONFIG_ARM + +static unsigned long fttmr010_read_current_timer_up(void) +{ + return readl(local_fttmr->base + TIMER2_COUNT); +} + +static unsigned long fttmr010_read_current_timer_down(void) +{ + return ~readl(local_fttmr->base + TIMER2_COUNT); +} + +#endif + static int fttmr010_timer_set_next_event(unsigned long cycles, struct clock_event_device *evt) { @@ -347,6 +368,18 @@ static int __init fttmr010_common_init(struct device_node *np, bool is_aspeed) fttmr010->tick_rate, 1, 0xffffffff); +#ifdef CONFIG_ARM + /* Also use this timer for delays */ + if (fttmr010->count_down) + fttmr010->delay_timer.read_current_timer = + fttmr010_read_current_timer_down; + else + fttmr010->delay_timer.read_current_timer = + fttmr010_read_current_timer_up; + fttmr010->delay_timer.freq = fttmr010->tick_rate; + register_current_timer_delay(&fttmr010->delay_timer); +#endif + return 0; out_unmap: -- cgit v1.2.3-58-ga151 From c477990295a78f1248283322bd1ad964c22151bc Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 13 Jun 2017 23:48:13 +0200 Subject: clocksource/drivers/fttmr010: Factor out clock read code The sched_clock() and delay timer callbacks can just call each other and we can save an #ifdef. Suggested-by: Daniel Lezcano Cc: Andrew Jeffery Cc: Joel Stanley Cc: Jonas Jensen Signed-off-by: Linus Walleij Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-fttmr010.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c index 009370460f23..66dd909960c6 100644 --- a/drivers/clocksource/timer-fttmr010.c +++ b/drivers/clocksource/timer-fttmr010.c @@ -98,30 +98,26 @@ static inline struct fttmr010 *to_fttmr010(struct clock_event_device *evt) return container_of(evt, struct fttmr010, clkevt); } -static u64 notrace fttmr010_read_sched_clock_up(void) +static unsigned long fttmr010_read_current_timer_up(void) { return readl(local_fttmr->base + TIMER2_COUNT); } -static u64 notrace fttmr010_read_sched_clock_down(void) +static unsigned long fttmr010_read_current_timer_down(void) { return ~readl(local_fttmr->base + TIMER2_COUNT); } -#ifdef CONFIG_ARM - -static unsigned long fttmr010_read_current_timer_up(void) +static u64 notrace fttmr010_read_sched_clock_up(void) { - return readl(local_fttmr->base + TIMER2_COUNT); + return fttmr010_read_current_timer_up(); } -static unsigned long fttmr010_read_current_timer_down(void) +static u64 notrace fttmr010_read_sched_clock_down(void) { - return ~readl(local_fttmr->base + TIMER2_COUNT); + return fttmr010_read_current_timer_down(); } -#endif - static int fttmr010_timer_set_next_event(unsigned long cycles, struct clock_event_device *evt) { -- cgit v1.2.3-58-ga151 From 3f1d472055bbe914c9e54715fdbf2272851e23ff Mon Sep 17 00:00:00 2001 From: Mariusz Skamra Date: Fri, 26 May 2017 15:00:47 +0200 Subject: ktime: Simplify ktime_compare implementation ktime_sub can be used here instread of two conditional checks. Signed-off-by: Mariusz Skamra Signed-off-by: Thomas Gleixner Acked-by: Kuppuswamy Sathyanarayanan Link: http://lkml.kernel.org/r/1495803647-9504-1-git-send-email-mariuszx.skamra@intel.com --- include/linux/ktime.h | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/include/linux/ktime.h b/include/linux/ktime.h index 0c8bd45c8206..04817b1ca019 100644 --- a/include/linux/ktime.h +++ b/include/linux/ktime.h @@ -108,11 +108,7 @@ static inline ktime_t timeval_to_ktime(struct timeval tv) */ static inline int ktime_compare(const ktime_t cmp1, const ktime_t cmp2) { - if (cmp1 < cmp2) - return -1; - if (cmp1 > cmp2) - return 1; - return 0; + return ktime_sub(cmp1, cmp2); } /** -- cgit v1.2.3-58-ga151 From d15bc69affc57d7985a01745ca28eafa0772325b Mon Sep 17 00:00:00 2001 From: Peter Meerwald-Stadler Date: Tue, 30 May 2017 21:41:03 +0200 Subject: timers: Fix parameter description of try_to_del_timer_sync() Signed-off-by: Peter Meerwald-Stadler Link: http://lkml.kernel.org/r/20170530194103.7454-1-pmeerw@pmeerw.net Cc: John Stultz Cc: trivial@rustcorp.com.au Signed-off-by: Thomas Gleixner --- kernel/time/timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/timer.c b/kernel/time/timer.c index 152a706ef8b8..709a404bd133 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -1150,7 +1150,7 @@ EXPORT_SYMBOL(del_timer); /** * try_to_del_timer_sync - Try to deactivate a timer - * @timer: timer do del + * @timer: timer to delete * * This function tries to deactivate a timer. Upon successful (ret >= 0) * exit the timer is not queued and the handler is not running on any CPU. -- cgit v1.2.3-58-ga151 From 35eb7258c009dc478338e674a5a84d25d0929c56 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 20 Jun 2017 17:37:35 +0200 Subject: itimer: Make timeval to nsec conversion range limited The expiry time of a itimer is supplied through sys_setitimer() via a struct timeval. The timeval is validated for correctness. In the actual set timer implementation the timeval is converted to a scalar nanoseconds value. If the tv_sec part of the time spec is large enough the conversion to nanoseconds (sec * NSEC_PER_SEC) overflows 64bit. Mitigate that by using the timeval_to_ktime() conversion function, which checks the tv_sec part for a potential mult overflow and clamps the result to KTIME_MAX, which is about 292 years. Reported-by: Xishi Qiu Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: John Stultz Link: http://lkml.kernel.org/r/20170620154113.505981643@linutronix.de --- kernel/time/itimer.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/kernel/time/itimer.c b/kernel/time/itimer.c index 9dd7ff5e445a..2ef98a02376a 100644 --- a/kernel/time/itimer.c +++ b/kernel/time/itimer.c @@ -152,8 +152,12 @@ static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id, u64 oval, nval, ointerval, ninterval; struct cpu_itimer *it = &tsk->signal->it[clock_id]; - nval = timeval_to_ns(&value->it_value); - ninterval = timeval_to_ns(&value->it_interval); + /* + * Use the to_ktime conversion because that clamps the maximum + * value to KTIME_MAX and avoid multiplication overflows. + */ + nval = ktime_to_ns(timeval_to_ktime(value->it_value)); + ninterval = ktime_to_ns(timeval_to_ktime(value->it_interval)); spin_lock_irq(&tsk->sighand->siglock); -- cgit v1.2.3-58-ga151 From 098b0e01a91c42aaaf0425605cd126b03fcb0bcf Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 20 Jun 2017 17:37:36 +0200 Subject: posix-cpu-timers: Make timespec to nsec conversion safe The expiry time of a posix cpu timer is supplied through sys_timer_set() via a struct timespec. The timespec is validated for correctness. In the actual set timer implementation the timespec is converted to a scalar nanoseconds value. If the tv_sec part of the time spec is large enough the conversion to nanoseconds (sec * NSEC_PER_SEC) overflows 64bit. Mitigate that by using the timespec_to_ktime() conversion function, which checks the tv_sec part for a potential mult overflow and clamps the result to KTIME_MAX, which is about 292 years. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: Xishi Qiu Cc: John Stultz Link: http://lkml.kernel.org/r/20170620154113.588276707@linutronix.de --- kernel/time/posix-cpu-timers.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 9df618ee64cf..60cb24ac9ebc 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -580,7 +580,11 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, WARN_ON_ONCE(p == NULL); - new_expires = timespec64_to_ns(&new->it_value); + /* + * Use the to_ktime conversion because that clamps the maximum + * value to KTIME_MAX and avoid multiplication overflows. + */ + new_expires = ktime_to_ns(timespec64_to_ktime(new->it_value)); /* * Protect against sighand release/switch in exit/exec and p->cpu_timers -- cgit v1.2.3-58-ga151 From fc6eead7c1e2e5376c25d2795d4539fdacbc0648 Mon Sep 17 00:00:00 2001 From: John Stultz Date: Mon, 22 May 2017 17:20:20 -0700 Subject: time: Clean up CLOCK_MONOTONIC_RAW time handling Now that we fixed the sub-ns handling for CLOCK_MONOTONIC_RAW, remove the duplicitive tk->raw_time.tv_nsec, which can be stored in tk->tkr_raw.xtime_nsec (similarly to how its handled for monotonic time). Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Miroslav Lichvar Cc: Richard Cochran Cc: Prarit Bhargava Cc: Stephen Boyd Cc: Kevin Brodsky Cc: Will Deacon Cc: Daniel Mentz Tested-by: Daniel Mentz Signed-off-by: John Stultz --- arch/arm64/kernel/vdso.c | 6 ++--- include/linux/timekeeper_internal.h | 4 ++-- kernel/time/timekeeping.c | 45 ++++++++++++++++++++----------------- 3 files changed, 29 insertions(+), 26 deletions(-) diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index d0cb007fa482..7492d9009610 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -220,10 +220,8 @@ void update_vsyscall(struct timekeeper *tk) if (!use_syscall) { /* tkr_mono.cycle_last == tkr_raw.cycle_last */ vdso_data->cs_cycle_last = tk->tkr_mono.cycle_last; - vdso_data->raw_time_sec = tk->raw_time.tv_sec; - vdso_data->raw_time_nsec = (tk->raw_time.tv_nsec << - tk->tkr_raw.shift) + - tk->tkr_raw.xtime_nsec; + vdso_data->raw_time_sec = tk->raw_sec; + vdso_data->raw_time_nsec = tk->tkr_raw.xtime_nsec; vdso_data->xtime_clock_sec = tk->xtime_sec; vdso_data->xtime_clock_nsec = tk->tkr_mono.xtime_nsec; vdso_data->cs_mono_mult = tk->tkr_mono.mult; diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h index f7043ccca81c..0a0a53daf2a2 100644 --- a/include/linux/timekeeper_internal.h +++ b/include/linux/timekeeper_internal.h @@ -51,7 +51,7 @@ struct tk_read_base { * @clock_was_set_seq: The sequence number of clock was set events * @cs_was_changed_seq: The sequence number of clocksource change events * @next_leap_ktime: CLOCK_MONOTONIC time value of a pending leap-second - * @raw_time: Monotonic raw base time in timespec64 format + * @raw_sec: CLOCK_MONOTONIC_RAW time in seconds * @cycle_interval: Number of clock cycles in one NTP interval * @xtime_interval: Number of clock shifted nano seconds in one NTP * interval. @@ -93,7 +93,7 @@ struct timekeeper { unsigned int clock_was_set_seq; u8 cs_was_changed_seq; ktime_t next_leap_ktime; - struct timespec64 raw_time; + u64 raw_sec; /* The following members are for timekeeping internal use */ u64 cycle_interval; diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index b602c48cb841..0454bfa24353 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -72,6 +72,10 @@ static inline void tk_normalize_xtime(struct timekeeper *tk) tk->tkr_mono.xtime_nsec -= (u64)NSEC_PER_SEC << tk->tkr_mono.shift; tk->xtime_sec++; } + while (tk->tkr_raw.xtime_nsec >= ((u64)NSEC_PER_SEC << tk->tkr_raw.shift)) { + tk->tkr_raw.xtime_nsec -= (u64)NSEC_PER_SEC << tk->tkr_raw.shift; + tk->raw_sec++; + } } static inline struct timespec64 tk_xtime(struct timekeeper *tk) @@ -285,12 +289,14 @@ static void tk_setup_internals(struct timekeeper *tk, struct clocksource *clock) /* if changing clocks, convert xtime_nsec shift units */ if (old_clock) { int shift_change = clock->shift - old_clock->shift; - if (shift_change < 0) + if (shift_change < 0) { tk->tkr_mono.xtime_nsec >>= -shift_change; - else + tk->tkr_raw.xtime_nsec >>= -shift_change; + } else { tk->tkr_mono.xtime_nsec <<= shift_change; + tk->tkr_raw.xtime_nsec <<= shift_change; + } } - tk->tkr_raw.xtime_nsec = 0; tk->tkr_mono.shift = clock->shift; tk->tkr_raw.shift = clock->shift; @@ -619,9 +625,6 @@ static inline void tk_update_ktime_data(struct timekeeper *tk) nsec = (u32) tk->wall_to_monotonic.tv_nsec; tk->tkr_mono.base = ns_to_ktime(seconds * NSEC_PER_SEC + nsec); - /* Update the monotonic raw base */ - tk->tkr_raw.base = timespec64_to_ktime(tk->raw_time); - /* * The sum of the nanoseconds portions of xtime and * wall_to_monotonic can be greater/equal one second. Take @@ -631,6 +634,11 @@ static inline void tk_update_ktime_data(struct timekeeper *tk) if (nsec >= NSEC_PER_SEC) seconds++; tk->ktime_sec = seconds; + + /* Update the monotonic raw base */ + seconds = tk->raw_sec; + nsec = (u32)(tk->tkr_raw.xtime_nsec >> tk->tkr_raw.shift); + tk->tkr_raw.base = ns_to_ktime(seconds * NSEC_PER_SEC + nsec); } /* must hold timekeeper_lock */ @@ -672,7 +680,6 @@ static void timekeeping_update(struct timekeeper *tk, unsigned int action) static void timekeeping_forward_now(struct timekeeper *tk) { u64 cycle_now, delta; - u64 nsec; cycle_now = tk_clock_read(&tk->tkr_mono); delta = clocksource_delta(cycle_now, tk->tkr_mono.cycle_last, tk->tkr_mono.mask); @@ -684,10 +691,13 @@ static void timekeeping_forward_now(struct timekeeper *tk) /* If arch requires, add in get_arch_timeoffset() */ tk->tkr_mono.xtime_nsec += (u64)arch_gettimeoffset() << tk->tkr_mono.shift; - tk_normalize_xtime(tk); - nsec = clocksource_cyc2ns(delta, tk->tkr_raw.mult, tk->tkr_raw.shift); - timespec64_add_ns(&tk->raw_time, nsec); + tk->tkr_raw.xtime_nsec += delta * tk->tkr_raw.mult; + + /* If arch requires, add in get_arch_timeoffset() */ + tk->tkr_raw.xtime_nsec += (u64)arch_gettimeoffset() << tk->tkr_raw.shift; + + tk_normalize_xtime(tk); } /** @@ -1373,19 +1383,18 @@ int timekeeping_notify(struct clocksource *clock) void getrawmonotonic64(struct timespec64 *ts) { struct timekeeper *tk = &tk_core.timekeeper; - struct timespec64 ts64; unsigned long seq; u64 nsecs; do { seq = read_seqcount_begin(&tk_core.seq); + ts->tv_sec = tk->raw_sec; nsecs = timekeeping_get_ns(&tk->tkr_raw); - ts64 = tk->raw_time; } while (read_seqcount_retry(&tk_core.seq, seq)); - timespec64_add_ns(&ts64, nsecs); - *ts = ts64; + ts->tv_nsec = 0; + timespec64_add_ns(ts, nsecs); } EXPORT_SYMBOL(getrawmonotonic64); @@ -1509,8 +1518,7 @@ void __init timekeeping_init(void) tk_setup_internals(tk, clock); tk_set_xtime(tk, &now); - tk->raw_time.tv_sec = 0; - tk->raw_time.tv_nsec = 0; + tk->raw_sec = 0; if (boot.tv_sec == 0 && boot.tv_nsec == 0) boot = tk_xtime(tk); @@ -2011,15 +2019,12 @@ static u64 logarithmic_accumulation(struct timekeeper *tk, u64 offset, *clock_set |= accumulate_nsecs_to_secs(tk); /* Accumulate raw time */ - tk->tkr_raw.xtime_nsec += (u64)tk->raw_time.tv_nsec << tk->tkr_raw.shift; tk->tkr_raw.xtime_nsec += tk->raw_interval << shift; snsec_per_sec = (u64)NSEC_PER_SEC << tk->tkr_raw.shift; while (tk->tkr_raw.xtime_nsec >= snsec_per_sec) { tk->tkr_raw.xtime_nsec -= snsec_per_sec; - tk->raw_time.tv_sec++; + tk->raw_sec++; } - tk->raw_time.tv_nsec = tk->tkr_raw.xtime_nsec >> tk->tkr_raw.shift; - tk->tkr_raw.xtime_nsec -= (u64)tk->raw_time.tv_nsec << tk->tkr_raw.shift; /* Accumulate error between NTP and clock interval */ tk->ntp_error += tk->ntp_tick << shift; -- cgit v1.2.3-58-ga151 From 369adf04d80a7e179b9ea6d74cc01c233f142f47 Mon Sep 17 00:00:00 2001 From: John Stultz Date: Fri, 12 May 2017 10:58:18 -0700 Subject: time: Add warning about imminent deprecation of CONFIG_GENERIC_TIME_VSYSCALL_OLD CONFIG_GENERIC_TIME_VSYSCALL_OLD was introduced five years ago to allow a transition from the old vsyscall implementations to the new method (which simplified internal accounting and made timekeeping more precise). However, PPC and IA64 have yet to make the transition, despite in some cases me sending test patches to try to help it along. http://patches.linaro.org/patch/30501/ http://patches.linaro.org/patch/35412/ If its helpful, my last pass at the patches can be found here: https://git.linaro.org/people/john.stultz/linux.git dev/oldvsyscall-cleanup So I think its time to set a deadline and make it clear this is going away. So this patch adds warnings about this functionality being dropped. Likely to be in v4.15. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Miroslav Lichvar Cc: Richard Cochran Cc: Prarit Bhargava Cc: Marcelo Tosatti Cc: Paul Mackerras Cc: Anton Blanchard Cc: Benjamin Herrenschmidt Cc: Tony Luck Cc: Michael Ellerman Cc: Fenghua Yu Signed-off-by: John Stultz --- kernel/time/timekeeping.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 0454bfa24353..cedafa008de5 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -516,6 +516,7 @@ static void halt_fast_timekeeper(struct timekeeper *tk) } #ifdef CONFIG_GENERIC_TIME_VSYSCALL_OLD +#warning Please contact your maintainers, as GENERIC_TIME_VSYSCALL_OLD compatibity will disappear soon. static inline void update_vsyscall(struct timekeeper *tk) { -- cgit v1.2.3-58-ga151 From 7a5de5512296fd2ab7a497e4a576196b1f046e78 Mon Sep 17 00:00:00 2001 From: Miroslav Lichvar Date: Tue, 13 Jun 2017 12:57:07 +0200 Subject: kselftests: timers: Fix inconsistency-check to not ignore first timestamp When the first timestamp in the list of clock readings was later than the second timestamp and all other timestamps were in order, the inconsistency was not reported because the index of the out-of-order timestamp was equal to the default value. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Miroslav Lichvar Cc: Richard Cochran Cc: Prarit Bhargava Cc: Stephen Boyd Cc: Shuah Khan Signed-off-by: Miroslav Lichvar Signed-off-by: John Stultz --- tools/testing/selftests/timers/inconsistency-check.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c index caf1bc9257c4..74c60e8759a0 100644 --- a/tools/testing/selftests/timers/inconsistency-check.c +++ b/tools/testing/selftests/timers/inconsistency-check.c @@ -118,7 +118,7 @@ int consistency_test(int clock_type, unsigned long seconds) start_str = ctime(&t); while (seconds == -1 || now - then < seconds) { - inconsistent = 0; + inconsistent = -1; /* Fill list */ for (i = 0; i < CALLS_PER_LOOP; i++) @@ -130,7 +130,7 @@ int consistency_test(int clock_type, unsigned long seconds) inconsistent = i; /* display inconsistency */ - if (inconsistent) { + if (inconsistent >= 0) { unsigned long long delta; printf("\%s\n", start_str); -- cgit v1.2.3-58-ga151 From 767392565a3e618950fe1a5ff1ba11295f6332f4 Mon Sep 17 00:00:00 2001 From: Miroslav Lichvar Date: Fri, 9 Jun 2017 13:43:17 +0200 Subject: kselftests: timers: Add test for frequency step This test checks the response of the system clock to frequency steps made with adjtimex(). The frequency error and stability of the CLOCK_MONOTONIC clock relative to the CLOCK_MONOTONIC_RAW clock is measured in two intervals following the step. The test fails if values from the second interval exceed specified limits. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Miroslav Lichvar Cc: Richard Cochran Cc: Prarit Bhargava Cc: Stephen Boyd Cc: Shuah Khan Signed-off-by: Miroslav Lichvar Signed-off-by: John Stultz --- tools/testing/selftests/timers/Makefile | 5 +- tools/testing/selftests/timers/freq-step.c | 268 +++++++++++++++++++++++++++++ 2 files changed, 271 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/timers/freq-step.c diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile index 5fa1d7e9a915..5801bbefbe89 100644 --- a/tools/testing/selftests/timers/Makefile +++ b/tools/testing/selftests/timers/Makefile @@ -1,6 +1,6 @@ BUILD_FLAGS = -DKTEST CFLAGS += -O3 -Wl,-no-as-needed -Wall $(BUILD_FLAGS) -LDFLAGS += -lrt -lpthread +LDFLAGS += -lrt -lpthread -lm # these are all "safe" tests that don't modify # system time or require escalated privileges @@ -8,7 +8,7 @@ TEST_GEN_PROGS = posix_timers nanosleep nsleep-lat set-timer-lat mqueue-lat \ inconsistency-check raw_skew threadtest rtctest TEST_GEN_PROGS_EXTENDED = alarmtimer-suspend valid-adjtimex adjtick change_skew \ - skew_consistency clocksource-switch leap-a-day \ + skew_consistency clocksource-switch freq-step leap-a-day \ leapcrash set-tai set-2038 set-tz @@ -24,6 +24,7 @@ run_destructive_tests: run_tests ./change_skew ./skew_consistency ./clocksource-switch + ./freq-step ./leap-a-day -s -i 10 ./leapcrash ./set-tz diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c new file mode 100644 index 000000000000..e8c61830825a --- /dev/null +++ b/tools/testing/selftests/timers/freq-step.c @@ -0,0 +1,268 @@ +/* + * This test checks the response of the system clock to frequency + * steps made with adjtimex(). The frequency error and stability of + * the CLOCK_MONOTONIC clock relative to the CLOCK_MONOTONIC_RAW clock + * is measured in two intervals following the step. The test fails if + * values from the second interval exceed specified limits. + * + * Copyright (C) Miroslav Lichvar 2017 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include +#include +#include +#include +#include + +#include "../kselftest.h" + +#define SAMPLES 100 +#define SAMPLE_READINGS 10 +#define MEAN_SAMPLE_INTERVAL 0.1 +#define STEP_INTERVAL 1.0 +#define MAX_PRECISION 100e-9 +#define MAX_FREQ_ERROR 10e-6 +#define MAX_STDDEV 1000e-9 + +struct sample { + double offset; + double time; +}; + +static time_t mono_raw_base; +static time_t mono_base; +static long user_hz; +static double precision; +static double mono_freq_offset; + +static double diff_timespec(struct timespec *ts1, struct timespec *ts2) +{ + return ts1->tv_sec - ts2->tv_sec + (ts1->tv_nsec - ts2->tv_nsec) / 1e9; +} + +static double get_sample(struct sample *sample) +{ + double delay, mindelay = 0.0; + struct timespec ts1, ts2, ts3; + int i; + + for (i = 0; i < SAMPLE_READINGS; i++) { + clock_gettime(CLOCK_MONOTONIC_RAW, &ts1); + clock_gettime(CLOCK_MONOTONIC, &ts2); + clock_gettime(CLOCK_MONOTONIC_RAW, &ts3); + + ts1.tv_sec -= mono_raw_base; + ts2.tv_sec -= mono_base; + ts3.tv_sec -= mono_raw_base; + + delay = diff_timespec(&ts3, &ts1); + if (delay <= 1e-9) { + i--; + continue; + } + + if (!i || delay < mindelay) { + sample->offset = diff_timespec(&ts2, &ts1); + sample->offset -= delay / 2.0; + sample->time = ts1.tv_sec + ts1.tv_nsec / 1e9; + mindelay = delay; + } + } + + return mindelay; +} + +static void reset_ntp_error(void) +{ + struct timex txc; + + txc.modes = ADJ_SETOFFSET; + txc.time.tv_sec = 0; + txc.time.tv_usec = 0; + + if (adjtimex(&txc) < 0) { + perror("[FAIL] adjtimex"); + ksft_exit_fail(); + } +} + +static void set_frequency(double freq) +{ + struct timex txc; + int tick_offset; + + tick_offset = 1e6 * freq / user_hz; + + txc.modes = ADJ_TICK | ADJ_FREQUENCY; + txc.tick = 1000000 / user_hz + tick_offset; + txc.freq = (1e6 * freq - user_hz * tick_offset) * (1 << 16); + + if (adjtimex(&txc) < 0) { + perror("[FAIL] adjtimex"); + ksft_exit_fail(); + } +} + +static void regress(struct sample *samples, int n, double *intercept, + double *slope, double *r_stddev, double *r_max) +{ + double x, y, r, x_sum, y_sum, xy_sum, x2_sum, r2_sum; + int i; + + x_sum = 0.0, y_sum = 0.0, xy_sum = 0.0, x2_sum = 0.0; + + for (i = 0; i < n; i++) { + x = samples[i].time; + y = samples[i].offset; + + x_sum += x; + y_sum += y; + xy_sum += x * y; + x2_sum += x * x; + } + + *slope = (xy_sum - x_sum * y_sum / n) / (x2_sum - x_sum * x_sum / n); + *intercept = (y_sum - *slope * x_sum) / n; + + *r_max = 0.0, r2_sum = 0.0; + + for (i = 0; i < n; i++) { + x = samples[i].time; + y = samples[i].offset; + r = fabs(x * *slope + *intercept - y); + if (*r_max < r) + *r_max = r; + r2_sum += r * r; + } + + *r_stddev = sqrt(r2_sum / n); +} + +static int run_test(int calibration, double freq_base, double freq_step) +{ + struct sample samples[SAMPLES]; + double intercept, slope, stddev1, max1, stddev2, max2; + double freq_error1, freq_error2; + int i; + + set_frequency(freq_base); + + for (i = 0; i < 10; i++) + usleep(1e6 * MEAN_SAMPLE_INTERVAL / 10); + + reset_ntp_error(); + + set_frequency(freq_base + freq_step); + + for (i = 0; i < 10; i++) + usleep(rand() % 2000000 * STEP_INTERVAL / 10); + + set_frequency(freq_base); + + for (i = 0; i < SAMPLES; i++) { + usleep(rand() % 2000000 * MEAN_SAMPLE_INTERVAL); + get_sample(&samples[i]); + } + + if (calibration) { + regress(samples, SAMPLES, &intercept, &slope, &stddev1, &max1); + mono_freq_offset = slope; + printf("CLOCK_MONOTONIC_RAW frequency offset: %11.3f ppm\n", + 1e6 * mono_freq_offset); + return 0; + } + + regress(samples, SAMPLES / 2, &intercept, &slope, &stddev1, &max1); + freq_error1 = slope * (1.0 - mono_freq_offset) - mono_freq_offset - + freq_base; + + regress(samples + SAMPLES / 2, SAMPLES / 2, &intercept, &slope, + &stddev2, &max2); + freq_error2 = slope * (1.0 - mono_freq_offset) - mono_freq_offset - + freq_base; + + printf("%6.0f %+10.3f %6.0f %7.0f %+10.3f %6.0f %7.0f\t", + 1e6 * freq_step, + 1e6 * freq_error1, 1e9 * stddev1, 1e9 * max1, + 1e6 * freq_error2, 1e9 * stddev2, 1e9 * max2); + + if (fabs(freq_error2) > MAX_FREQ_ERROR || stddev2 > MAX_STDDEV) { + printf("[FAIL]\n"); + return 1; + } + + printf("[OK]\n"); + return 0; +} + +static void init_test(void) +{ + struct timespec ts; + struct sample sample; + + if (clock_gettime(CLOCK_MONOTONIC_RAW, &ts)) { + perror("[FAIL] clock_gettime(CLOCK_MONOTONIC_RAW)"); + ksft_exit_fail(); + } + + mono_raw_base = ts.tv_sec; + + if (clock_gettime(CLOCK_MONOTONIC, &ts)) { + perror("[FAIL] clock_gettime(CLOCK_MONOTONIC)"); + ksft_exit_fail(); + } + + mono_base = ts.tv_sec; + + user_hz = sysconf(_SC_CLK_TCK); + + precision = get_sample(&sample) / 2.0; + printf("CLOCK_MONOTONIC_RAW+CLOCK_MONOTONIC precision: %.0f ns\t\t", + 1e9 * precision); + + if (precision > MAX_PRECISION) { + printf("[SKIP]\n"); + ksft_exit_skip(); + } + + printf("[OK]\n"); + srand(ts.tv_sec ^ ts.tv_nsec); + + run_test(1, 0.0, 0.0); +} + +int main(int argc, char **argv) +{ + double freq_base, freq_step; + int i, j, fails = 0; + + init_test(); + + printf("Checking response to frequency step:\n"); + printf(" Step 1st interval 2nd interval\n"); + printf(" Freq Dev Max Freq Dev Max\n"); + + for (i = 2; i >= 0; i--) { + for (j = 0; j < 5; j++) { + freq_base = (rand() % (1 << 24) - (1 << 23)) / 65536e6; + freq_step = 10e-6 * (1 << (6 * i)); + fails += run_test(0, freq_base, freq_step); + } + } + + set_frequency(0.0); + + if (fails) + ksft_exit_fail(); + + ksft_exit_pass(); +} -- cgit v1.2.3-58-ga151 From b7dcc4eacc45263ac5d3a0bd78c64e9ff7c94c13 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 21 Jun 2017 23:49:54 +0200 Subject: clocksource/drivers: Fix uninitialized variable use in timer_of_init If none of the flags are set, 'ret' is uninitialized as pointed out by gcc: drivers/clocksource/timer-of.c: In function 'timer_of_init': drivers/clocksource/timer-of.c:160:9: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized] Since calling the function without any of the flags is an error, set the return value to -EINVAL for that case. [ tglx: Get rid of the silly backwards goto while at it ] Fixes: dc11bae78529 ("clocksource/drivers: Add timer-of common init routine") Signed-off-by: Arnd Bergmann Signed-off-by: Thomas Gleixner Cc: Daniel Lezcano Link: http://lkml.kernel.org/r/20170621215005.3870011-1-arnd@arndb.de --- drivers/clocksource/timer-of.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/clocksource/timer-of.c b/drivers/clocksource/timer-of.c index be1dbee11c20..64b1c2081a67 100644 --- a/drivers/clocksource/timer-of.c +++ b/drivers/clocksource/timer-of.c @@ -130,7 +130,7 @@ static __init int timer_base_init(struct device_node *np, int __init timer_of_init(struct device_node *np, struct timer_of *to) { - int ret; + int ret = -EINVAL; int flags = 0; if (to->flags & TIMER_OF_BASE) { @@ -156,7 +156,6 @@ int __init timer_of_init(struct device_node *np, struct timer_of *to) if (!to->clkevt.name) to->clkevt.name = np->name; -out: return ret; out_fail: @@ -168,5 +167,5 @@ out_fail: if (flags & TIMER_OF_BASE) timer_base_exit(&to->of_base); - goto out; + return ret; } -- cgit v1.2.3-58-ga151 From 9902747ec57d11b27c98e53d66112ecceed43c82 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 26 Jun 2017 10:24:27 +0200 Subject: Revert "ktime: Simplify ktime_compare implementation" Thierry bisected boot failures to this simplification commit. Reverts: 3f1d472055bb ("ktime: Simplify ktime_compare implementation") Reported-by: Thierry Reding Signed-off-by: Thomas Gleixner Cc: Mariusz Skamra --- include/linux/ktime.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/ktime.h b/include/linux/ktime.h index 04817b1ca019..0c8bd45c8206 100644 --- a/include/linux/ktime.h +++ b/include/linux/ktime.h @@ -108,7 +108,11 @@ static inline ktime_t timeval_to_ktime(struct timeval tv) */ static inline int ktime_compare(const ktime_t cmp1, const ktime_t cmp2) { - return ktime_sub(cmp1, cmp2); + if (cmp1 < cmp2) + return -1; + if (cmp1 > cmp2) + return 1; + return 0; } /** -- cgit v1.2.3-58-ga151 From 22ece4e3df6335e691207de1198a609e761b8640 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 20 Jun 2017 07:51:11 +0200 Subject: clocksource/drivers/timer-of: Fix invalid iomap check A typo in the code checks the return value of iomap against !NULL and, thus, fails everytime the mapping succeed. Fix this by inverting the condition in the check. Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-of.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clocksource/timer-of.c b/drivers/clocksource/timer-of.c index 64b1c2081a67..f6e7491c873c 100644 --- a/drivers/clocksource/timer-of.c +++ b/drivers/clocksource/timer-of.c @@ -120,7 +120,7 @@ static __init int timer_base_init(struct device_node *np, const char *name = of_base->name ? of_base->name : np->full_name; of_base->base = of_io_request_and_map(np, of_base->index, name); - if (of_base->base) { + if (!of_base->base) { pr_err("Failed to iomap (%s)\n", name); return -ENXIO; } -- cgit v1.2.3-58-ga151 From 239751edad27d4fae964fb1f4ca1fedd742c8365 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 6 Jun 2017 23:07:51 +0200 Subject: clocksource/drivers/sun4i: Switch to the timer-of common init Previously a framework to factor out the drivers init function has been merged. Use this common framework in this driver, we get: Before: text data bss dec hex filename 1787 384 12 2183 887 drivers/clocksource/sun4i_timer.o After: text data bss dec hex filename 1407 512 0 1919 77f drivers/clocksource/sun4i_timer.o Signed-off-by: Daniel Lezcano Tested-by: Chen-Yu Tsai --- drivers/clocksource/Kconfig | 1 + drivers/clocksource/sun4i_timer.c | 171 +++++++++++++++++--------------------- 2 files changed, 78 insertions(+), 94 deletions(-) diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 4be163bca8a8..88818a43d6e9 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -108,6 +108,7 @@ config SUN4I_TIMER depends on GENERIC_CLOCKEVENTS depends on HAS_IOMEM select CLKSRC_MMIO + select TIMER_OF help Enables support for the Sun4i timer. diff --git a/drivers/clocksource/sun4i_timer.c b/drivers/clocksource/sun4i_timer.c index 3e4bc64ff176..6e0180aaf784 100644 --- a/drivers/clocksource/sun4i_timer.c +++ b/drivers/clocksource/sun4i_timer.c @@ -24,6 +24,8 @@ #include #include +#include "timer-of.h" + #define TIMER_IRQ_EN_REG 0x00 #define TIMER_IRQ_EN(val) BIT(val) #define TIMER_IRQ_ST_REG 0x04 @@ -39,38 +41,37 @@ #define TIMER_SYNC_TICKS 3 -static void __iomem *timer_base; -static u32 ticks_per_jiffy; - /* * When we disable a timer, we need to wait at least for 2 cycles of * the timer source clock. We will use for that the clocksource timer * that is already setup and runs at the same frequency than the other * timers, and we never will be disabled. */ -static void sun4i_clkevt_sync(void) +static void sun4i_clkevt_sync(void __iomem *base) { - u32 old = readl(timer_base + TIMER_CNTVAL_REG(1)); + u32 old = readl(base + TIMER_CNTVAL_REG(1)); - while ((old - readl(timer_base + TIMER_CNTVAL_REG(1))) < TIMER_SYNC_TICKS) + while ((old - readl(base + TIMER_CNTVAL_REG(1))) < TIMER_SYNC_TICKS) cpu_relax(); } -static void sun4i_clkevt_time_stop(u8 timer) +static void sun4i_clkevt_time_stop(void __iomem *base, u8 timer) { - u32 val = readl(timer_base + TIMER_CTL_REG(timer)); - writel(val & ~TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(timer)); - sun4i_clkevt_sync(); + u32 val = readl(base + TIMER_CTL_REG(timer)); + writel(val & ~TIMER_CTL_ENABLE, base + TIMER_CTL_REG(timer)); + sun4i_clkevt_sync(base); } -static void sun4i_clkevt_time_setup(u8 timer, unsigned long delay) +static void sun4i_clkevt_time_setup(void __iomem *base, u8 timer, + unsigned long delay) { - writel(delay, timer_base + TIMER_INTVAL_REG(timer)); + writel(delay, base + TIMER_INTVAL_REG(timer)); } -static void sun4i_clkevt_time_start(u8 timer, bool periodic) +static void sun4i_clkevt_time_start(void __iomem *base, u8 timer, + bool periodic) { - u32 val = readl(timer_base + TIMER_CTL_REG(timer)); + u32 val = readl(base + TIMER_CTL_REG(timer)); if (periodic) val &= ~TIMER_CTL_ONESHOT; @@ -78,115 +79,106 @@ static void sun4i_clkevt_time_start(u8 timer, bool periodic) val |= TIMER_CTL_ONESHOT; writel(val | TIMER_CTL_ENABLE | TIMER_CTL_RELOAD, - timer_base + TIMER_CTL_REG(timer)); + base + TIMER_CTL_REG(timer)); } static int sun4i_clkevt_shutdown(struct clock_event_device *evt) { - sun4i_clkevt_time_stop(0); + struct timer_of *to = to_timer_of(evt); + + sun4i_clkevt_time_stop(timer_of_base(to), 0); + return 0; } static int sun4i_clkevt_set_oneshot(struct clock_event_device *evt) { - sun4i_clkevt_time_stop(0); - sun4i_clkevt_time_start(0, false); + struct timer_of *to = to_timer_of(evt); + + sun4i_clkevt_time_stop(timer_of_base(to), 0); + sun4i_clkevt_time_start(timer_of_base(to), 0, false); + return 0; } static int sun4i_clkevt_set_periodic(struct clock_event_device *evt) { - sun4i_clkevt_time_stop(0); - sun4i_clkevt_time_setup(0, ticks_per_jiffy); - sun4i_clkevt_time_start(0, true); + struct timer_of *to = to_timer_of(evt); + + sun4i_clkevt_time_stop(timer_of_base(to), 0); + sun4i_clkevt_time_setup(timer_of_base(to), 0, timer_of_period(to)); + sun4i_clkevt_time_start(timer_of_base(to), 0, true); + return 0; } static int sun4i_clkevt_next_event(unsigned long evt, - struct clock_event_device *unused) + struct clock_event_device *clkevt) { - sun4i_clkevt_time_stop(0); - sun4i_clkevt_time_setup(0, evt - TIMER_SYNC_TICKS); - sun4i_clkevt_time_start(0, false); + struct timer_of *to = to_timer_of(clkevt); + + sun4i_clkevt_time_stop(timer_of_base(to), 0); + sun4i_clkevt_time_setup(timer_of_base(to), 0, evt - TIMER_SYNC_TICKS); + sun4i_clkevt_time_start(timer_of_base(to), 0, false); return 0; } -static struct clock_event_device sun4i_clockevent = { - .name = "sun4i_tick", - .rating = 350, - .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .set_state_shutdown = sun4i_clkevt_shutdown, - .set_state_periodic = sun4i_clkevt_set_periodic, - .set_state_oneshot = sun4i_clkevt_set_oneshot, - .tick_resume = sun4i_clkevt_shutdown, - .set_next_event = sun4i_clkevt_next_event, -}; - -static void sun4i_timer_clear_interrupt(void) +static void sun4i_timer_clear_interrupt(void __iomem *base) { - writel(TIMER_IRQ_EN(0), timer_base + TIMER_IRQ_ST_REG); + writel(TIMER_IRQ_EN(0), base + TIMER_IRQ_ST_REG); } static irqreturn_t sun4i_timer_interrupt(int irq, void *dev_id) { struct clock_event_device *evt = (struct clock_event_device *)dev_id; + struct timer_of *to = to_timer_of(evt); - sun4i_timer_clear_interrupt(); + sun4i_timer_clear_interrupt(timer_of_base(to)); evt->event_handler(evt); return IRQ_HANDLED; } -static struct irqaction sun4i_timer_irq = { - .name = "sun4i_timer0", - .flags = IRQF_TIMER | IRQF_IRQPOLL, - .handler = sun4i_timer_interrupt, - .dev_id = &sun4i_clockevent, +static struct timer_of to = { + .flags = TIMER_OF_IRQ | TIMER_OF_CLOCK | TIMER_OF_BASE, + + .clkevt = { + .name = "sun4i_tick", + .rating = 350, + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .set_state_shutdown = sun4i_clkevt_shutdown, + .set_state_periodic = sun4i_clkevt_set_periodic, + .set_state_oneshot = sun4i_clkevt_set_oneshot, + .tick_resume = sun4i_clkevt_shutdown, + .set_next_event = sun4i_clkevt_next_event, + .cpumask = cpu_possible_mask, + }, + + .of_irq = { + .handler = sun4i_timer_interrupt, + .flags = IRQF_TIMER | IRQF_IRQPOLL, + }, }; static u64 notrace sun4i_timer_sched_read(void) { - return ~readl(timer_base + TIMER_CNTVAL_REG(1)); + return ~readl(timer_of_base(&to) + TIMER_CNTVAL_REG(1)); } static int __init sun4i_timer_init(struct device_node *node) { - unsigned long rate = 0; - struct clk *clk; - int ret, irq; + int ret; u32 val; - timer_base = of_iomap(node, 0); - if (!timer_base) { - pr_crit("Can't map registers\n"); - return -ENXIO; - } - - irq = irq_of_parse_and_map(node, 0); - if (irq <= 0) { - pr_crit("Can't parse IRQ\n"); - return -EINVAL; - } - - clk = of_clk_get(node, 0); - if (IS_ERR(clk)) { - pr_crit("Can't get timer clock\n"); - return PTR_ERR(clk); - } - - ret = clk_prepare_enable(clk); - if (ret) { - pr_err("Failed to prepare clock\n"); + ret = timer_of_init(node, &to); + if (ret) return ret; - } - - rate = clk_get_rate(clk); - writel(~0, timer_base + TIMER_INTVAL_REG(1)); + writel(~0, timer_of_base(&to) + TIMER_INTVAL_REG(1)); writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD | TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M), - timer_base + TIMER_CTL_REG(1)); + timer_of_base(&to) + TIMER_CTL_REG(1)); /* * sched_clock_register does not have priorities, and on sun6i and @@ -195,41 +187,32 @@ static int __init sun4i_timer_init(struct device_node *node) if (of_machine_is_compatible("allwinner,sun4i-a10") || of_machine_is_compatible("allwinner,sun5i-a13") || of_machine_is_compatible("allwinner,sun5i-a10s")) - sched_clock_register(sun4i_timer_sched_read, 32, rate); + sched_clock_register(sun4i_timer_sched_read, 32, + timer_of_rate(&to)); - ret = clocksource_mmio_init(timer_base + TIMER_CNTVAL_REG(1), node->name, - rate, 350, 32, clocksource_mmio_readl_down); + ret = clocksource_mmio_init(timer_of_base(&to) + TIMER_CNTVAL_REG(1), + node->name, timer_of_rate(&to), 350, 32, + clocksource_mmio_readl_down); if (ret) { pr_err("Failed to register clocksource\n"); return ret; } - ticks_per_jiffy = DIV_ROUND_UP(rate, HZ); - writel(TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M), - timer_base + TIMER_CTL_REG(0)); + timer_of_base(&to) + TIMER_CTL_REG(0)); /* Make sure timer is stopped before playing with interrupts */ - sun4i_clkevt_time_stop(0); + sun4i_clkevt_time_stop(timer_of_base(&to), 0); /* clear timer0 interrupt */ - sun4i_timer_clear_interrupt(); - - sun4i_clockevent.cpumask = cpu_possible_mask; - sun4i_clockevent.irq = irq; + sun4i_timer_clear_interrupt(timer_of_base(&to)); - clockevents_config_and_register(&sun4i_clockevent, rate, + clockevents_config_and_register(&to.clkevt, timer_of_rate(&to), TIMER_SYNC_TICKS, 0xffffffff); - ret = setup_irq(irq, &sun4i_timer_irq); - if (ret) { - pr_err("failed to setup irq %d\n", irq); - return ret; - } - /* Enable timer0 interrupt */ - val = readl(timer_base + TIMER_IRQ_EN_REG); - writel(val | TIMER_IRQ_EN(0), timer_base + TIMER_IRQ_EN_REG); + val = readl(timer_of_base(&to) + TIMER_IRQ_EN_REG); + writel(val | TIMER_IRQ_EN(0), timer_of_base(&to) + TIMER_IRQ_EN_REG); return ret; } -- cgit v1.2.3-58-ga151 From 6ec8be251fb445dcc43086a485fec1b2708c09da Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Fri, 23 Jun 2017 17:03:31 +0200 Subject: clocksource/drivers/tcb_clksrc: Make IO endian agnostic Now that AVR32 is gone, we can use the proper IO accessors that are correctly handling endianness. Signed-off-by: Alexandre Belloni Acked-by: Nicolas Ferre Signed-off-by: Daniel Lezcano --- drivers/clocksource/tcb_clksrc.c | 58 ++++++++++++++++++++-------------------- 1 file changed, 29 insertions(+), 29 deletions(-) diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c index 828729c70a0c..59e8aee0ec16 100644 --- a/drivers/clocksource/tcb_clksrc.c +++ b/drivers/clocksource/tcb_clksrc.c @@ -57,9 +57,9 @@ static u64 tc_get_cycles(struct clocksource *cs) raw_local_irq_save(flags); do { - upper = __raw_readl(tcaddr + ATMEL_TC_REG(1, CV)); - lower = __raw_readl(tcaddr + ATMEL_TC_REG(0, CV)); - } while (upper != __raw_readl(tcaddr + ATMEL_TC_REG(1, CV))); + upper = readl_relaxed(tcaddr + ATMEL_TC_REG(1, CV)); + lower = readl_relaxed(tcaddr + ATMEL_TC_REG(0, CV)); + } while (upper != readl_relaxed(tcaddr + ATMEL_TC_REG(1, CV))); raw_local_irq_restore(flags); return (upper << 16) | lower; @@ -67,7 +67,7 @@ static u64 tc_get_cycles(struct clocksource *cs) static u64 tc_get_cycles32(struct clocksource *cs) { - return __raw_readl(tcaddr + ATMEL_TC_REG(0, CV)); + return readl_relaxed(tcaddr + ATMEL_TC_REG(0, CV)); } void tc_clksrc_suspend(struct clocksource *cs) @@ -147,8 +147,8 @@ static int tc_shutdown(struct clock_event_device *d) struct tc_clkevt_device *tcd = to_tc_clkevt(d); void __iomem *regs = tcd->regs; - __raw_writel(0xff, regs + ATMEL_TC_REG(2, IDR)); - __raw_writel(ATMEL_TC_CLKDIS, regs + ATMEL_TC_REG(2, CCR)); + writel(0xff, regs + ATMEL_TC_REG(2, IDR)); + writel(ATMEL_TC_CLKDIS, regs + ATMEL_TC_REG(2, CCR)); if (!clockevent_state_detached(d)) clk_disable(tcd->clk); @@ -166,9 +166,9 @@ static int tc_set_oneshot(struct clock_event_device *d) clk_enable(tcd->clk); /* slow clock, count up to RC, then irq and stop */ - __raw_writel(timer_clock | ATMEL_TC_CPCSTOP | ATMEL_TC_WAVE | + writel(timer_clock | ATMEL_TC_CPCSTOP | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP_AUTO, regs + ATMEL_TC_REG(2, CMR)); - __raw_writel(ATMEL_TC_CPCS, regs + ATMEL_TC_REG(2, IER)); + writel(ATMEL_TC_CPCS, regs + ATMEL_TC_REG(2, IER)); /* set_next_event() configures and starts the timer */ return 0; @@ -188,25 +188,25 @@ static int tc_set_periodic(struct clock_event_device *d) clk_enable(tcd->clk); /* slow clock, count up to RC, then irq and restart */ - __raw_writel(timer_clock | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP_AUTO, + writel(timer_clock | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP_AUTO, regs + ATMEL_TC_REG(2, CMR)); - __raw_writel((32768 + HZ / 2) / HZ, tcaddr + ATMEL_TC_REG(2, RC)); + writel((32768 + HZ / 2) / HZ, tcaddr + ATMEL_TC_REG(2, RC)); /* Enable clock and interrupts on RC compare */ - __raw_writel(ATMEL_TC_CPCS, regs + ATMEL_TC_REG(2, IER)); + writel(ATMEL_TC_CPCS, regs + ATMEL_TC_REG(2, IER)); /* go go gadget! */ - __raw_writel(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG, regs + + writel(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG, regs + ATMEL_TC_REG(2, CCR)); return 0; } static int tc_next_event(unsigned long delta, struct clock_event_device *d) { - __raw_writel(delta, tcaddr + ATMEL_TC_REG(2, RC)); + writel_relaxed(delta, tcaddr + ATMEL_TC_REG(2, RC)); /* go go gadget! */ - __raw_writel(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG, + writel_relaxed(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG, tcaddr + ATMEL_TC_REG(2, CCR)); return 0; } @@ -230,7 +230,7 @@ static irqreturn_t ch2_irq(int irq, void *handle) struct tc_clkevt_device *dev = handle; unsigned int sr; - sr = __raw_readl(dev->regs + ATMEL_TC_REG(2, SR)); + sr = readl_relaxed(dev->regs + ATMEL_TC_REG(2, SR)); if (sr & ATMEL_TC_CPCS) { dev->clkevt.event_handler(&dev->clkevt); return IRQ_HANDLED; @@ -290,43 +290,43 @@ static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx) static void __init tcb_setup_dual_chan(struct atmel_tc *tc, int mck_divisor_idx) { /* channel 0: waveform mode, input mclk/8, clock TIOA0 on overflow */ - __raw_writel(mck_divisor_idx /* likely divide-by-8 */ + writel(mck_divisor_idx /* likely divide-by-8 */ | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP /* free-run */ | ATMEL_TC_ACPA_SET /* TIOA0 rises at 0 */ | ATMEL_TC_ACPC_CLEAR, /* (duty cycle 50%) */ tcaddr + ATMEL_TC_REG(0, CMR)); - __raw_writel(0x0000, tcaddr + ATMEL_TC_REG(0, RA)); - __raw_writel(0x8000, tcaddr + ATMEL_TC_REG(0, RC)); - __raw_writel(0xff, tcaddr + ATMEL_TC_REG(0, IDR)); /* no irqs */ - __raw_writel(ATMEL_TC_CLKEN, tcaddr + ATMEL_TC_REG(0, CCR)); + writel(0x0000, tcaddr + ATMEL_TC_REG(0, RA)); + writel(0x8000, tcaddr + ATMEL_TC_REG(0, RC)); + writel(0xff, tcaddr + ATMEL_TC_REG(0, IDR)); /* no irqs */ + writel(ATMEL_TC_CLKEN, tcaddr + ATMEL_TC_REG(0, CCR)); /* channel 1: waveform mode, input TIOA0 */ - __raw_writel(ATMEL_TC_XC1 /* input: TIOA0 */ + writel(ATMEL_TC_XC1 /* input: TIOA0 */ | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP, /* free-run */ tcaddr + ATMEL_TC_REG(1, CMR)); - __raw_writel(0xff, tcaddr + ATMEL_TC_REG(1, IDR)); /* no irqs */ - __raw_writel(ATMEL_TC_CLKEN, tcaddr + ATMEL_TC_REG(1, CCR)); + writel(0xff, tcaddr + ATMEL_TC_REG(1, IDR)); /* no irqs */ + writel(ATMEL_TC_CLKEN, tcaddr + ATMEL_TC_REG(1, CCR)); /* chain channel 0 to channel 1*/ - __raw_writel(ATMEL_TC_TC1XC1S_TIOA0, tcaddr + ATMEL_TC_BMR); + writel(ATMEL_TC_TC1XC1S_TIOA0, tcaddr + ATMEL_TC_BMR); /* then reset all the timers */ - __raw_writel(ATMEL_TC_SYNC, tcaddr + ATMEL_TC_BCR); + writel(ATMEL_TC_SYNC, tcaddr + ATMEL_TC_BCR); } static void __init tcb_setup_single_chan(struct atmel_tc *tc, int mck_divisor_idx) { /* channel 0: waveform mode, input mclk/8 */ - __raw_writel(mck_divisor_idx /* likely divide-by-8 */ + writel(mck_divisor_idx /* likely divide-by-8 */ | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP, /* free-run */ tcaddr + ATMEL_TC_REG(0, CMR)); - __raw_writel(0xff, tcaddr + ATMEL_TC_REG(0, IDR)); /* no irqs */ - __raw_writel(ATMEL_TC_CLKEN, tcaddr + ATMEL_TC_REG(0, CCR)); + writel(0xff, tcaddr + ATMEL_TC_REG(0, IDR)); /* no irqs */ + writel(ATMEL_TC_CLKEN, tcaddr + ATMEL_TC_REG(0, CCR)); /* then reset all the timers */ - __raw_writel(ATMEL_TC_SYNC, tcaddr + ATMEL_TC_BCR); + writel(ATMEL_TC_SYNC, tcaddr + ATMEL_TC_BCR); } static int __init tcb_clksrc_init(void) -- cgit v1.2.3-58-ga151 From b70957f656cc070eaaac60b00dca5b40967cb8d6 Mon Sep 17 00:00:00 2001 From: Arvind Yadav Date: Tue, 20 Jun 2017 16:33:30 +0530 Subject: clocksource/drivers/fsl_ftm_timer: Unmap region obtained by of_iomap In case of error at init time, rollback iomapping. Signed-off-by: Arvind Yadav Signed-off-by: Daniel Lezcano --- drivers/clocksource/fsl_ftm_timer.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/clocksource/fsl_ftm_timer.c b/drivers/clocksource/fsl_ftm_timer.c index 3121e2d96c91..3ee7e6fea621 100644 --- a/drivers/clocksource/fsl_ftm_timer.c +++ b/drivers/clocksource/fsl_ftm_timer.c @@ -329,13 +329,13 @@ static int __init ftm_timer_init(struct device_node *np) priv->clkevt_base = of_iomap(np, 0); if (!priv->clkevt_base) { pr_err("ftm: unable to map event timer registers\n"); - goto err; + goto err_clkevt; } priv->clksrc_base = of_iomap(np, 1); if (!priv->clksrc_base) { pr_err("ftm: unable to map source timer registers\n"); - goto err; + goto err_clksrc; } ret = -EINVAL; @@ -366,6 +366,10 @@ static int __init ftm_timer_init(struct device_node *np) return 0; err: + iounmap(priv->clksrc_base); +err_clksrc: + iounmap(priv->clkevt_base); +err_clkevt: kfree(priv); return ret; } -- cgit v1.2.3-58-ga151 From 8c3ecd60e2ee6268e1735952e5b544f05b4dbb5a Mon Sep 17 00:00:00 2001 From: Christophe Jaillet Date: Fri, 23 Jun 2017 21:55:10 +0200 Subject: clocksource/drivers/mips-gic-timer: Fix an error code in 'gic_clocksource_of_init()' 'clk' is a valid pointer at this point. So calling PTR_ERR on it is pointess. Return the error code from 'clk_prepare_enable()' if it fails instead. Signed-off-by: Christophe JAILLET Signed-off-by: Daniel Lezcano --- drivers/clocksource/mips-gic-timer.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c index e31e08326024..17b861ea2626 100644 --- a/drivers/clocksource/mips-gic-timer.c +++ b/drivers/clocksource/mips-gic-timer.c @@ -167,10 +167,11 @@ static int __init gic_clocksource_of_init(struct device_node *node) clk = of_clk_get(node, 0); if (!IS_ERR(clk)) { - if (clk_prepare_enable(clk) < 0) { + ret = clk_prepare_enable(clk); + if (ret < 0) { pr_err("GIC failed to enable clock\n"); clk_put(clk); - return PTR_ERR(clk); + return ret; } gic_frequency = clk_get_rate(clk); -- cgit v1.2.3-58-ga151 From 2287d8664fe7345ead891017eccd879fc605305e Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Tue, 27 Jun 2017 18:15:38 +0200 Subject: timers: Make the cpu base lock raw The timers cpu base lock could not be converted to a raw spinlock becaue the lock held time was non-deterministic due to cascading and long lasting timer wheel traversals. The rework of the timer wheel to the new non-cascading model removed also the wheel traversals and the lock held times are deterministic now. This allows to make the lock raw and thereby unbreaks NOHz* on preempt-RT. Signed-off-by: Sebastian Andrzej Siewior Link: http://lkml.kernel.org/r/20170627161538.30257-1-bigeasy@linutronix.de Signed-off-by: Thomas Gleixner --- kernel/time/timer.c | 48 ++++++++++++++++++++++++------------------------ 1 file changed, 24 insertions(+), 24 deletions(-) diff --git a/kernel/time/timer.c b/kernel/time/timer.c index 709a404bd133..71ce3f4eead3 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -195,7 +195,7 @@ EXPORT_SYMBOL(jiffies_64); #endif struct timer_base { - spinlock_t lock; + raw_spinlock_t lock; struct timer_list *running_timer; unsigned long clk; unsigned long next_expiry; @@ -913,10 +913,10 @@ static struct timer_base *lock_timer_base(struct timer_list *timer, if (!(tf & TIMER_MIGRATING)) { base = get_timer_base(tf); - spin_lock_irqsave(&base->lock, *flags); + raw_spin_lock_irqsave(&base->lock, *flags); if (timer->flags == tf) return base; - spin_unlock_irqrestore(&base->lock, *flags); + raw_spin_unlock_irqrestore(&base->lock, *flags); } cpu_relax(); } @@ -986,9 +986,9 @@ __mod_timer(struct timer_list *timer, unsigned long expires, bool pending_only) /* See the comment in lock_timer_base() */ timer->flags |= TIMER_MIGRATING; - spin_unlock(&base->lock); + raw_spin_unlock(&base->lock); base = new_base; - spin_lock(&base->lock); + raw_spin_lock(&base->lock); WRITE_ONCE(timer->flags, (timer->flags & ~TIMER_BASEMASK) | base->cpu); } @@ -1013,7 +1013,7 @@ __mod_timer(struct timer_list *timer, unsigned long expires, bool pending_only) } out_unlock: - spin_unlock_irqrestore(&base->lock, flags); + raw_spin_unlock_irqrestore(&base->lock, flags); return ret; } @@ -1106,16 +1106,16 @@ void add_timer_on(struct timer_list *timer, int cpu) if (base != new_base) { timer->flags |= TIMER_MIGRATING; - spin_unlock(&base->lock); + raw_spin_unlock(&base->lock); base = new_base; - spin_lock(&base->lock); + raw_spin_lock(&base->lock); WRITE_ONCE(timer->flags, (timer->flags & ~TIMER_BASEMASK) | cpu); } debug_activate(timer, timer->expires); internal_add_timer(base, timer); - spin_unlock_irqrestore(&base->lock, flags); + raw_spin_unlock_irqrestore(&base->lock, flags); } EXPORT_SYMBOL_GPL(add_timer_on); @@ -1141,7 +1141,7 @@ int del_timer(struct timer_list *timer) if (timer_pending(timer)) { base = lock_timer_base(timer, &flags); ret = detach_if_pending(timer, base, true); - spin_unlock_irqrestore(&base->lock, flags); + raw_spin_unlock_irqrestore(&base->lock, flags); } return ret; @@ -1168,7 +1168,7 @@ int try_to_del_timer_sync(struct timer_list *timer) if (base->running_timer != timer) ret = detach_if_pending(timer, base, true); - spin_unlock_irqrestore(&base->lock, flags); + raw_spin_unlock_irqrestore(&base->lock, flags); return ret; } @@ -1299,13 +1299,13 @@ static void expire_timers(struct timer_base *base, struct hlist_head *head) data = timer->data; if (timer->flags & TIMER_IRQSAFE) { - spin_unlock(&base->lock); + raw_spin_unlock(&base->lock); call_timer_fn(timer, fn, data); - spin_lock(&base->lock); + raw_spin_lock(&base->lock); } else { - spin_unlock_irq(&base->lock); + raw_spin_unlock_irq(&base->lock); call_timer_fn(timer, fn, data); - spin_lock_irq(&base->lock); + raw_spin_lock_irq(&base->lock); } } } @@ -1474,7 +1474,7 @@ u64 get_next_timer_interrupt(unsigned long basej, u64 basem) if (cpu_is_offline(smp_processor_id())) return expires; - spin_lock(&base->lock); + raw_spin_lock(&base->lock); nextevt = __next_timer_interrupt(base); is_max_delta = (nextevt == base->clk + NEXT_TIMER_MAX_DELTA); base->next_expiry = nextevt; @@ -1502,7 +1502,7 @@ u64 get_next_timer_interrupt(unsigned long basej, u64 basem) if ((expires - basem) > TICK_NSEC) base->is_idle = true; } - spin_unlock(&base->lock); + raw_spin_unlock(&base->lock); return cmp_next_hrtimer_event(basem, expires); } @@ -1590,7 +1590,7 @@ static inline void __run_timers(struct timer_base *base) if (!time_after_eq(jiffies, base->clk)) return; - spin_lock_irq(&base->lock); + raw_spin_lock_irq(&base->lock); while (time_after_eq(jiffies, base->clk)) { @@ -1601,7 +1601,7 @@ static inline void __run_timers(struct timer_base *base) expire_timers(base, heads + levels); } base->running_timer = NULL; - spin_unlock_irq(&base->lock); + raw_spin_unlock_irq(&base->lock); } /* @@ -1786,16 +1786,16 @@ int timers_dead_cpu(unsigned int cpu) * The caller is globally serialized and nobody else * takes two locks at once, deadlock is not possible. */ - spin_lock_irq(&new_base->lock); - spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING); + raw_spin_lock_irq(&new_base->lock); + raw_spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING); BUG_ON(old_base->running_timer); for (i = 0; i < WHEEL_SIZE; i++) migrate_timer_list(new_base, old_base->vectors + i); - spin_unlock(&old_base->lock); - spin_unlock_irq(&new_base->lock); + raw_spin_unlock(&old_base->lock); + raw_spin_unlock_irq(&new_base->lock); put_cpu_ptr(&timer_bases); } return 0; @@ -1811,7 +1811,7 @@ static void __init init_timer_cpu(int cpu) for (i = 0; i < NR_BASES; i++) { base = per_cpu_ptr(&timer_bases[i], cpu); base->cpu = cpu; - spin_lock_init(&base->lock); + raw_spin_lock_init(&base->lock); base->clk = jiffies; } } -- cgit v1.2.3-58-ga151