diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 37 | ||||
| -rw-r--r-- | init/do_mounts_initrd.c | 13 | ||||
| -rw-r--r-- | init/init_task.c | 13 | ||||
| -rw-r--r-- | init/main.c | 24 |
4 files changed, 66 insertions, 21 deletions
diff --git a/init/Kconfig b/init/Kconfig index fb8ab85de7f8..58a4b705c1c2 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -40,6 +40,9 @@ config LD_VERSION config CC_IS_CLANG def_bool $(success,echo "$(CC_VERSION_TEXT)" | grep -q clang) +config LD_IS_LLD + def_bool $(success,$(LD) -v | head -n 1 | grep -q LLD) + config CLANG_VERSION int default $(shell,$(srctree)/scripts/clang-version.sh $(CC)) @@ -57,6 +60,10 @@ config CC_CAN_LINK_STATIC config CC_HAS_ASM_GOTO def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC)) +config CC_HAS_ASM_GOTO_OUTPUT + depends on CC_HAS_ASM_GOTO + def_bool $(success,echo 'int foo(int x) { asm goto ("": "=r"(x) ::: bar); return x; bar: return 0; }' | $(CC) -x c - -c -o /dev/null) + config TOOLS_SUPPORT_RELR def_bool $(success,env "CC=$(CC)" "LD=$(LD)" "NM=$(NM)" "OBJCOPY=$(OBJCOPY)" $(srctree)/scripts/tools-support-relr.sh) @@ -281,6 +288,16 @@ config KERNEL_UNCOMPRESSED endchoice +config DEFAULT_INIT + string "Default init path" + default "" + help + This option determines the default init for the system if no init= + option is passed on the kernel command line. If the requested path is + not present, we will still then move on to attempting further + locations (e.g. /sbin/init, etc). If this is empty, we will just use + the fallback list when init= is not passed. + config DEFAULT_HOSTNAME string "Default hostname" default "(none)" @@ -843,24 +860,9 @@ config MEMCG Provides control over the memory footprint of tasks in a cgroup. config MEMCG_SWAP - bool "Swap controller" + bool depends on MEMCG && SWAP - help - Provides control over the swap space consumed by tasks in a cgroup. - -config MEMCG_SWAP_ENABLED - bool "Swap controller enabled by default" - depends on MEMCG_SWAP default y - help - Memory Resource Controller Swap Extension comes with its price in - a bigger memory consumption. General purpose distribution kernels - which want to enable the feature but keep it disabled by default - and let the user enable it by swapaccount=1 boot command line - parameter should have this option unselected. - For those who want to have the feature enabled by default should - select this option (if, for some reason, they need to disable it - then swapaccount=0 does the trick). config MEMCG_KMEM bool @@ -2285,6 +2287,9 @@ config ASN1 source "kernel/Kconfig.locks" +config ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE + bool + config ARCH_HAS_SYNC_CORE_BEFORE_USERMODE bool diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c index dab8b1151b56..d72beda824aa 100644 --- a/init/do_mounts_initrd.c +++ b/init/do_mounts_initrd.c @@ -28,7 +28,7 @@ static int __init no_initrd(char *str) __setup("noinitrd", no_initrd); -static int __init early_initrd(char *p) +static int __init early_initrdmem(char *p) { phys_addr_t start; unsigned long size; @@ -43,6 +43,17 @@ static int __init early_initrd(char *p) } return 0; } +early_param("initrdmem", early_initrdmem); + +/* + * This is here as the initrd keyword has been in use since 11/2018 + * on ARM, PowerPC, and MIPS. + * It should not be; it is reserved for bootloaders. + */ +static int __init early_initrd(char *p) +{ + return early_initrdmem(p); +} early_param("initrd", early_initrd); static int init_linuxrc(struct subprocess_info *info, struct cred *new) diff --git a/init/init_task.c b/init/init_task.c index bd403ed3e418..15303d58d9db 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -11,6 +11,7 @@ #include <linux/mm.h> #include <linux/audit.h> #include <linux/numa.h> +#include <linux/scs.h> #include <asm/pgtable.h> #include <linux/uaccess.h> @@ -50,6 +51,13 @@ static struct sighand_struct init_sighand = { .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh), }; +#ifdef CONFIG_SHADOW_CALL_STACK +unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] + __init_task_data = { + [(SCS_SIZE / sizeof(long)) - 1] = SCS_END_MAGIC +}; +#endif + /* * Set up the first task table, touch at your own risk!. Base=0, * limit=0x1fffff (=2MB) @@ -141,6 +149,11 @@ struct task_struct init_task .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list), .rcu_tasks_idle_cpu = -1, #endif +#ifdef CONFIG_TASKS_TRACE_RCU + .trc_reader_nesting = 0, + .trc_reader_special.s = 0, + .trc_holdout_list = LIST_HEAD_INIT(init_task.trc_holdout_list), +#endif #ifdef CONFIG_CPUSETS .mems_allowed_seq = SEQCNT_ZERO(init_task.mems_allowed_seq), #endif diff --git a/init/main.c b/init/main.c index 1a5da2c2660c..76df62fc3e2c 100644 --- a/init/main.c +++ b/init/main.c @@ -63,6 +63,7 @@ #include <linux/debugobjects.h> #include <linux/lockdep.h> #include <linux/kmemleak.h> +#include <linux/padata.h> #include <linux/pid_namespace.h> #include <linux/device/driver.h> #include <linux/kthread.h> @@ -400,9 +401,8 @@ static void __init setup_boot_config(const char *cmdline) char *data, *copy; int ret; + /* Cut out the bootconfig data even if we have no bootconfig option */ data = get_boot_config_from_initrd(&size, &csum); - if (!data) - goto not_found; strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE); parse_args("bootconfig", tmp_cmdline, NULL, 0, 0, 0, NULL, @@ -411,6 +411,11 @@ static void __init setup_boot_config(const char *cmdline) if (!bootconfig_found) return; + if (!data) { + pr_err("'bootconfig' found on command line, but no bootconfig found\n"); + return; + } + if (size >= XBC_DATA_MAX) { pr_err("bootconfig size %d greater than max size %d\n", size, XBC_DATA_MAX); @@ -446,8 +451,6 @@ static void __init setup_boot_config(const char *cmdline) extra_init_args = xbc_make_cmdline("init"); } return; -not_found: - pr_err("'bootconfig' found on command line, but no bootconfig found\n"); } #else @@ -1036,6 +1039,8 @@ asmlinkage __visible void __init start_kernel(void) /* Do the rest non-__init'ed, we're now alive */ arch_call_rest_init(); + + prevent_tail_call_optimization(); } /* Call all constructor functions linked into the kernel. */ @@ -1428,6 +1433,16 @@ static int __ref kernel_init(void *unused) panic("Requested init %s failed (error %d).", execute_command, ret); } + + if (CONFIG_DEFAULT_INIT[0] != '\0') { + ret = run_init_process(CONFIG_DEFAULT_INIT); + if (ret) + pr_err("Default init %s failed (error %d)\n", + CONFIG_DEFAULT_INIT, ret); + else + return 0; + } + if (!try_to_run_init_process("/sbin/init") || !try_to_run_init_process("/etc/init") || !try_to_run_init_process("/bin/init") || @@ -1478,6 +1493,7 @@ static noinline void __init kernel_init_freeable(void) smp_init(); sched_init_smp(); + padata_init(); page_alloc_init_late(); /* Initialize page ext after all struct pages are initialized. */ page_ext_init(); |