diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/fork.c | 31 | ||||
| -rw-r--r-- | kernel/irq/autoprobe.c | 2 | ||||
| -rw-r--r-- | kernel/irq/chip.c | 6 | ||||
| -rw-r--r-- | kernel/irq/internals.h | 2 | ||||
| -rw-r--r-- | kernel/power/power.h | 3 |
5 files changed, 31 insertions, 13 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 5e6cf0dd031c..5c372c954f3b 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -283,8 +283,9 @@ static void free_thread_stack(struct task_struct *tsk) void thread_stack_cache_init(void) { - thread_stack_cache = kmem_cache_create("thread_stack", THREAD_SIZE, - THREAD_SIZE, 0, NULL); + thread_stack_cache = kmem_cache_create_usercopy("thread_stack", + THREAD_SIZE, THREAD_SIZE, 0, 0, + THREAD_SIZE, NULL); BUG_ON(thread_stack_cache == NULL); } # endif @@ -693,6 +694,21 @@ static void set_max_threads(unsigned int max_threads_suggested) int arch_task_struct_size __read_mostly; #endif +static void task_struct_whitelist(unsigned long *offset, unsigned long *size) +{ + /* Fetch thread_struct whitelist for the architecture. */ + arch_thread_struct_whitelist(offset, size); + + /* + * Handle zero-sized whitelist or empty thread_struct, otherwise + * adjust offset to position of thread_struct in task_struct. + */ + if (unlikely(*size == 0)) + *offset = 0; + else + *offset += offsetof(struct task_struct, thread); +} + void __init fork_init(void) { int i; @@ -701,11 +717,14 @@ void __init fork_init(void) #define ARCH_MIN_TASKALIGN 0 #endif int align = max_t(int, L1_CACHE_BYTES, ARCH_MIN_TASKALIGN); + unsigned long useroffset, usersize; /* create a slab on which task_structs can be allocated */ - task_struct_cachep = kmem_cache_create("task_struct", + task_struct_whitelist(&useroffset, &usersize); + task_struct_cachep = kmem_cache_create_usercopy("task_struct", arch_task_struct_size, align, - SLAB_PANIC|SLAB_ACCOUNT, NULL); + SLAB_PANIC|SLAB_ACCOUNT, + useroffset, usersize, NULL); #endif /* do the arch specific task caches init */ @@ -2248,9 +2267,11 @@ void __init proc_caches_init(void) * maximum number of CPU's we can ever have. The cpumask_allocation * is at the end of the structure, exactly for that reason. */ - mm_cachep = kmem_cache_create("mm_struct", + mm_cachep = kmem_cache_create_usercopy("mm_struct", sizeof(struct mm_struct), ARCH_MIN_MMSTRUCT_ALIGN, SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, + offsetof(struct mm_struct, saved_auxv), + sizeof_field(struct mm_struct, saved_auxv), NULL); vm_area_cachep = KMEM_CACHE(vm_area_struct, SLAB_PANIC|SLAB_ACCOUNT); mmap_init(); diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c index 4e8089b319ae..8c82ea26e837 100644 --- a/kernel/irq/autoprobe.c +++ b/kernel/irq/autoprobe.c @@ -71,7 +71,7 @@ unsigned long probe_irq_on(void) raw_spin_lock_irq(&desc->lock); if (!desc->action && irq_settings_can_probe(desc)) { desc->istate |= IRQS_AUTODETECT | IRQS_WAITING; - if (irq_startup(desc, IRQ_NORESEND, IRQ_START_FORCE)) + if (irq_activate_and_startup(desc, IRQ_NORESEND)) desc->istate |= IRQS_PENDING; } raw_spin_unlock_irq(&desc->lock); diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 043bfc35b353..c69357a43849 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -294,11 +294,11 @@ int irq_activate(struct irq_desc *desc) return 0; } -void irq_activate_and_startup(struct irq_desc *desc, bool resend) +int irq_activate_and_startup(struct irq_desc *desc, bool resend) { if (WARN_ON(irq_activate(desc))) - return; - irq_startup(desc, resend, IRQ_START_FORCE); + return 0; + return irq_startup(desc, resend, IRQ_START_FORCE); } static void __irq_disable(struct irq_desc *desc, bool mask); diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index ab19371eab9b..ca6afa267070 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -76,7 +76,7 @@ extern void __enable_irq(struct irq_desc *desc); #define IRQ_START_COND false extern int irq_activate(struct irq_desc *desc); -extern void irq_activate_and_startup(struct irq_desc *desc, bool resend); +extern int irq_activate_and_startup(struct irq_desc *desc, bool resend); extern int irq_startup(struct irq_desc *desc, bool resend, bool force); extern void irq_shutdown(struct irq_desc *desc); diff --git a/kernel/power/power.h b/kernel/power/power.h index f29cd178df90..9e58bdc8a562 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -104,9 +104,6 @@ extern int in_suspend; extern dev_t swsusp_resume_device; extern sector_t swsusp_resume_block; -extern asmlinkage int swsusp_arch_suspend(void); -extern asmlinkage int swsusp_arch_resume(void); - extern int create_basic_memory_bitmaps(void); extern void free_basic_memory_bitmaps(void); extern int hibernate_preallocate_memory(void); |