X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fslab.h;h=2271886744f87a5fb43d5f307b7c062dc54528c1;hb=f0eef25339f92f7cd4aeea23d9ae97987a5a1e82;hp=45ad55b70d1c73e2eac26da896e4e2c2850d6431;hpb=075395d228641646159dae3dd170fa3fc6ff477a;p=linux-2.6 diff --git a/include/linux/slab.h b/include/linux/slab.h index 45ad55b70d..2271886744 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -1,5 +1,5 @@ /* - * linux/mm/slab.h + * linux/include/linux/slab.h * Written by Mark Hemment, 1996. * (markhe@nextd.demon.co.uk) */ @@ -7,27 +7,17 @@ #ifndef _LINUX_SLAB_H #define _LINUX_SLAB_H -#if defined(__KERNEL__) +#ifdef __KERNEL__ -typedef struct kmem_cache kmem_cache_t; +#include +#include +#include +#include /* kmalloc_sizes.h needs PAGE_SIZE */ +#include /* kmalloc_sizes.h needs L1_CACHE_BYTES */ +#include -#include -#include -#include -#include /* kmalloc_sizes.h needs PAGE_SIZE */ -#include /* kmalloc_sizes.h needs L1_CACHE_BYTES */ - -/* flags for kmem_cache_alloc() */ -#define SLAB_NOFS GFP_NOFS -#define SLAB_NOIO GFP_NOIO -#define SLAB_ATOMIC GFP_ATOMIC -#define SLAB_USER GFP_USER -#define SLAB_KERNEL GFP_KERNEL -#define SLAB_DMA GFP_DMA - -#define SLAB_LEVEL_MASK GFP_LEVEL_MASK - -#define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */ +/* kmem_cache_t exists for legacy reasons and is not used by code in mm */ +typedef struct kmem_cache kmem_cache_t __deprecated; /* flags to pass to kmem_cache_create(). * The first 3 are only valid when the allocator as been build @@ -57,34 +47,27 @@ typedef struct kmem_cache kmem_cache_t; /* prototypes */ extern void __init kmem_cache_init(void); -extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long, - void (*)(void *, kmem_cache_t *, unsigned long), - void (*)(void *, kmem_cache_t *, unsigned long)); -extern int kmem_cache_destroy(kmem_cache_t *); -extern int kmem_cache_shrink(kmem_cache_t *); -extern void *kmem_cache_alloc(kmem_cache_t *, gfp_t); +extern struct kmem_cache *kmem_cache_create(const char *, size_t, size_t, + unsigned long, + void (*)(void *, struct kmem_cache *, unsigned long), + void (*)(void *, struct kmem_cache *, unsigned long)); +extern void kmem_cache_destroy(struct kmem_cache *); +extern int kmem_cache_shrink(struct kmem_cache *); +extern void *kmem_cache_alloc(struct kmem_cache *, gfp_t); extern void *kmem_cache_zalloc(struct kmem_cache *, gfp_t); -extern void kmem_cache_free(kmem_cache_t *, void *); -extern unsigned int kmem_cache_size(kmem_cache_t *); -extern const char *kmem_cache_name(kmem_cache_t *); -extern kmem_cache_t *kmem_find_general_cachep(size_t size, gfp_t gfpflags); +extern void kmem_cache_free(struct kmem_cache *, void *); +extern unsigned int kmem_cache_size(struct kmem_cache *); +extern const char *kmem_cache_name(struct kmem_cache *); /* Size description struct for general caches. */ struct cache_sizes { - size_t cs_size; - kmem_cache_t *cs_cachep; - kmem_cache_t *cs_dmacachep; + size_t cs_size; + struct kmem_cache *cs_cachep; + struct kmem_cache *cs_dmacachep; }; extern struct cache_sizes malloc_sizes[]; extern void *__kmalloc(size_t, gfp_t); -#ifndef CONFIG_DEBUG_SLAB -#define ____kmalloc(size, flags) __kmalloc(size, flags) -#else -extern void *__kmalloc_track_caller(size_t, gfp_t, void*); -#define ____kmalloc(size, flags) \ - __kmalloc_track_caller(size, flags, __builtin_return_address(0)) -#endif /** * kmalloc - allocate memory @@ -154,6 +137,23 @@ found: return __kmalloc(size, flags); } +/* + * kmalloc_track_caller is a special version of kmalloc that records the + * calling function of the routine calling it for slab leak tracking instead + * of just the calling function (confusing, eh?). + * It's useful when the call to kmalloc comes from a widely-used standard + * allocator where we care about the real place the memory allocation + * request comes from. + */ +#ifndef CONFIG_DEBUG_SLAB +#define kmalloc_track_caller(size, flags) \ + __kmalloc(size, flags) +#else +extern void *__kmalloc_track_caller(size_t, gfp_t, void*); +#define kmalloc_track_caller(size, flags) \ + __kmalloc_track_caller(size, flags, __builtin_return_address(0)) +#endif + extern void *__kzalloc(size_t, gfp_t); /** @@ -202,10 +202,52 @@ extern unsigned int ksize(const void *); extern int slab_is_available(void); #ifdef CONFIG_NUMA -extern void *kmem_cache_alloc_node(kmem_cache_t *, gfp_t flags, int node); -extern void *kmalloc_node(size_t size, gfp_t flags, int node); +extern void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node); +extern void *__kmalloc_node(size_t size, gfp_t flags, int node); + +static inline void *kmalloc_node(size_t size, gfp_t flags, int node) +{ + if (__builtin_constant_p(size)) { + int i = 0; +#define CACHE(x) \ + if (size <= x) \ + goto found; \ + else \ + i++; +#include "kmalloc_sizes.h" +#undef CACHE + { + extern void __you_cannot_kmalloc_that_much(void); + __you_cannot_kmalloc_that_much(); + } +found: + return kmem_cache_alloc_node((flags & GFP_DMA) ? + malloc_sizes[i].cs_dmacachep : + malloc_sizes[i].cs_cachep, flags, node); + } + return __kmalloc_node(size, flags, node); +} + +/* + * kmalloc_node_track_caller is a special version of kmalloc_node that + * records the calling function of the routine calling it for slab leak + * tracking instead of just the calling function (confusing, eh?). + * It's useful when the call to kmalloc_node comes from a widely-used + * standard allocator where we care about the real place the memory + * allocation request comes from. + */ +#ifndef CONFIG_DEBUG_SLAB +#define kmalloc_node_track_caller(size, flags, node) \ + __kmalloc_node(size, flags, node) #else -static inline void *kmem_cache_alloc_node(kmem_cache_t *cachep, gfp_t flags, int node) +extern void *__kmalloc_node_track_caller(size_t, gfp_t, int, void *); +#define kmalloc_node_track_caller(size, flags, node) \ + __kmalloc_node_track_caller(size, flags, node, \ + __builtin_return_address(0)) +#endif +#else /* CONFIG_NUMA */ +static inline void *kmem_cache_alloc_node(struct kmem_cache *cachep, + gfp_t flags, int node) { return kmem_cache_alloc(cachep, flags); } @@ -213,22 +255,24 @@ static inline void *kmalloc_node(size_t size, gfp_t flags, int node) { return kmalloc(size, flags); } + +#define kmalloc_node_track_caller(size, flags, node) \ + kmalloc_track_caller(size, flags) #endif extern int FASTCALL(kmem_cache_reap(int)); -extern int FASTCALL(kmem_ptr_validate(kmem_cache_t *cachep, void *ptr)); +extern int FASTCALL(kmem_ptr_validate(struct kmem_cache *cachep, void *ptr)); #else /* CONFIG_SLOB */ /* SLOB allocator routines */ void kmem_cache_init(void); -struct kmem_cache *kmem_find_general_cachep(size_t, gfp_t gfpflags); struct kmem_cache *kmem_cache_create(const char *c, size_t, size_t, unsigned long, void (*)(void *, struct kmem_cache *, unsigned long), void (*)(void *, struct kmem_cache *, unsigned long)); -int kmem_cache_destroy(struct kmem_cache *c); +void kmem_cache_destroy(struct kmem_cache *c); void *kmem_cache_alloc(struct kmem_cache *c, gfp_t flags); void *kmem_cache_zalloc(struct kmem_cache *, gfp_t); void kmem_cache_free(struct kmem_cache *c, void *b); @@ -250,20 +294,11 @@ static inline void *kcalloc(size_t n, size_t size, gfp_t flags) #define kmem_cache_alloc_node(c, f, n) kmem_cache_alloc(c, f) #define kmalloc_node(s, f, n) kmalloc(s, f) #define kzalloc(s, f) __kzalloc(s, f) -#define ____kmalloc kmalloc +#define kmalloc_track_caller kmalloc -#endif /* CONFIG_SLOB */ +#define kmalloc_node_track_caller kmalloc_node -/* System wide caches */ -extern kmem_cache_t *vm_area_cachep; -extern kmem_cache_t *names_cachep; -extern kmem_cache_t *files_cachep; -extern kmem_cache_t *filp_cachep; -extern kmem_cache_t *fs_cachep; -extern kmem_cache_t *sighand_cachep; -extern kmem_cache_t *bio_cachep; - -extern atomic_t slab_reclaim_pages; +#endif /* CONFIG_SLOB */ #endif /* __KERNEL__ */