diff options
| -rw-r--r-- | arch/sh/include/asm/thread_info.h | 32 | ||||
| -rw-r--r-- | arch/sh/mm/init.c | 29 |
2 files changed, 43 insertions, 18 deletions
diff --git a/arch/sh/include/asm/thread_info.h b/arch/sh/include/asm/thread_info.h index 0a894cafb1dd..f09ac4806294 100644 --- a/arch/sh/include/asm/thread_info.h +++ b/arch/sh/include/asm/thread_info.h @@ -33,20 +33,12 @@ struct thread_info { #define PREEMPT_ACTIVE 0x10000000 #if defined(CONFIG_4KSTACKS) -#define THREAD_SIZE_ORDER (0) -#elif defined(CONFIG_PAGE_SIZE_4KB) -#define THREAD_SIZE_ORDER (1) -#elif defined(CONFIG_PAGE_SIZE_8KB) -#define THREAD_SIZE_ORDER (1) -#elif defined(CONFIG_PAGE_SIZE_16KB) -#define THREAD_SIZE_ORDER (0) -#elif defined(CONFIG_PAGE_SIZE_64KB) -#define THREAD_SIZE_ORDER (0) +#define THREAD_SHIFT 12 #else -#error "Unknown thread size" +#define THREAD_SHIFT 13 #endif -#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) +#define THREAD_SIZE (1 << THREAD_SHIFT) #define STACK_WARN (THREAD_SIZE >> 3) /* @@ -94,15 +86,19 @@ static inline struct thread_info *current_thread_info(void) return ti; } +/* thread information allocation */ +#if THREAD_SHIFT >= PAGE_SHIFT + +#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) + +#else /* THREAD_SHIFT < PAGE_SHIFT */ + #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR -/* thread information allocation */ -#ifdef CONFIG_DEBUG_STACK_USAGE -#define alloc_thread_info(ti) kzalloc(THREAD_SIZE, GFP_KERNEL) -#else -#define alloc_thread_info(ti) kmalloc(THREAD_SIZE, GFP_KERNEL) -#endif -#define free_thread_info(ti) kfree(ti) +extern struct thread_info *alloc_thread_info(struct task_struct *tsk); +extern void free_thread_info(struct thread_info *ti); + +#endif /* THREAD_SHIFT < PAGE_SHIFT */ #endif /* __ASSEMBLY__ */ diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index 31211bfdc6d8..2a53943924b2 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -265,6 +265,35 @@ void free_initrd_mem(unsigned long start, unsigned long end) } #endif +#if THREAD_SHIFT < PAGE_SHIFT +static struct kmem_cache *thread_info_cache; + +struct thread_info *alloc_thread_info(struct task_struct *tsk) +{ + struct thread_info *ti; + + ti = kmem_cache_alloc(thread_info_cache, GFP_KERNEL); + if (unlikely(ti == NULL)) + return NULL; +#ifdef CONFIG_DEBUG_STACK_USAGE + memset(ti, 0, THREAD_SIZE); +#endif + return ti; +} + +void free_thread_info(struct thread_info *ti) +{ + kmem_cache_free(thread_info_cache, ti); +} + +void thread_info_cache_init(void) +{ + thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE, + THREAD_SIZE, 0, NULL); + BUG_ON(thread_info_cache == NULL); +} +#endif /* THREAD_SHIFT < PAGE_SHIFT */ + #ifdef CONFIG_MEMORY_HOTPLUG int arch_add_memory(int nid, u64 start, u64 size) { |