diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/fork.c | 1 | ||||
| -rw-r--r-- | kernel/resource.c | 45 | ||||
| -rw-r--r-- | kernel/sched/core.c | 19 |
3 files changed, 45 insertions, 20 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 53e780748fe3..5a0fd518e04e 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1009,7 +1009,6 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p, mm_init_owner(mm, p); RCU_INIT_POINTER(mm->exe_file, NULL); mmu_notifier_mm_init(mm); - hmm_mm_init(mm); init_tlb_flush_pending(mm); #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS mm->pmd_huge_pte = NULL; diff --git a/kernel/resource.c b/kernel/resource.c index 7ea4306503c5..74877e9d90ca 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -1644,19 +1644,8 @@ void resource_list_free(struct list_head *head) EXPORT_SYMBOL(resource_list_free); #ifdef CONFIG_DEVICE_PRIVATE -/** - * devm_request_free_mem_region - find free region for device private memory - * - * @dev: device struct to bind the resource to - * @size: size in bytes of the device memory to add - * @base: resource tree to look in - * - * This function tries to find an empty range of physical address big enough to - * contain the new resource, so that it can later be hotplugged as ZONE_DEVICE - * memory, which in turn allocates struct pages. - */ -struct resource *devm_request_free_mem_region(struct device *dev, - struct resource *base, unsigned long size) +static struct resource *__request_free_mem_region(struct device *dev, + struct resource *base, unsigned long size, const char *name) { resource_size_t end, addr; struct resource *res; @@ -1670,7 +1659,10 @@ struct resource *devm_request_free_mem_region(struct device *dev, REGION_DISJOINT) continue; - res = devm_request_mem_region(dev, addr, size, dev_name(dev)); + if (dev) + res = devm_request_mem_region(dev, addr, size, name); + else + res = request_mem_region(addr, size, name); if (!res) return ERR_PTR(-ENOMEM); res->desc = IORES_DESC_DEVICE_PRIVATE_MEMORY; @@ -1679,7 +1671,32 @@ struct resource *devm_request_free_mem_region(struct device *dev, return ERR_PTR(-ERANGE); } + +/** + * devm_request_free_mem_region - find free region for device private memory + * + * @dev: device struct to bind the resource to + * @size: size in bytes of the device memory to add + * @base: resource tree to look in + * + * This function tries to find an empty range of physical address big enough to + * contain the new resource, so that it can later be hotplugged as ZONE_DEVICE + * memory, which in turn allocates struct pages. + */ +struct resource *devm_request_free_mem_region(struct device *dev, + struct resource *base, unsigned long size) +{ + return __request_free_mem_region(dev, base, size, dev_name(dev)); +} EXPORT_SYMBOL_GPL(devm_request_free_mem_region); + +struct resource *request_free_mem_region(struct resource *base, + unsigned long size, const char *name) +{ + return __request_free_mem_region(NULL, base, size, name); +} +EXPORT_SYMBOL_GPL(request_free_mem_region); + #endif /* CONFIG_DEVICE_PRIVATE */ static int __init strict_iomem(char *str) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 5e8387bdd09c..f9a1346a5fa9 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3871,13 +3871,22 @@ static noinline void __schedule_bug(struct task_struct *prev) /* * Various schedule()-time debugging checks and statistics: */ -static inline void schedule_debug(struct task_struct *prev) +static inline void schedule_debug(struct task_struct *prev, bool preempt) { #ifdef CONFIG_SCHED_STACK_END_CHECK if (task_stack_end_corrupted(prev)) panic("corrupted stack end detected inside scheduler\n"); #endif +#ifdef CONFIG_DEBUG_ATOMIC_SLEEP + if (!preempt && prev->state && prev->non_block_count) { + printk(KERN_ERR "BUG: scheduling in a non-blocking section: %s/%d/%i\n", + prev->comm, prev->pid, prev->non_block_count); + dump_stack(); + add_taint(TAINT_WARN, LOCKDEP_STILL_OK); + } +#endif + if (unlikely(in_atomic_preempt_off())) { __schedule_bug(prev); preempt_count_set(PREEMPT_DISABLED); @@ -3989,7 +3998,7 @@ static void __sched notrace __schedule(bool preempt) rq = cpu_rq(cpu); prev = rq->curr; - schedule_debug(prev); + schedule_debug(prev, preempt); if (sched_feat(HRTICK)) hrtick_clear(rq); @@ -6763,7 +6772,7 @@ void ___might_sleep(const char *file, int line, int preempt_offset) rcu_sleep_check(); if ((preempt_count_equals(preempt_offset) && !irqs_disabled() && - !is_idle_task(current)) || + !is_idle_task(current) && !current->non_block_count) || system_state == SYSTEM_BOOTING || system_state > SYSTEM_RUNNING || oops_in_progress) return; @@ -6779,8 +6788,8 @@ void ___might_sleep(const char *file, int line, int preempt_offset) "BUG: sleeping function called from invalid context at %s:%d\n", file, line); printk(KERN_ERR - "in_atomic(): %d, irqs_disabled(): %d, pid: %d, name: %s\n", - in_atomic(), irqs_disabled(), + "in_atomic(): %d, irqs_disabled(): %d, non_block: %d, pid: %d, name: %s\n", + in_atomic(), irqs_disabled(), current->non_block_count, current->pid, current->comm); if (task_stack_end_corrupted(current)) |