1 /* 2 * linux/mm/slab.h 3 * Written by Mark Hemment, 1996. 4 * (markhe@nextd.demon.co.uk) 5 */ 6 7 #if !defined(_LINUX_SLAB_H) 8 #define _LINUX_SLAB_H 9 10 #if defined(__KERNEL__) 11 12 typedef struct kmem_cache_s kmem_cache_t; 13 14 #include <linux/mm.h> 15 #include <linux/cache.h> 16 17 /* flags for kmem_cache_alloc() */ 18 #define SLAB_NOFS GFP_NOFS 19 #define SLAB_NOIO GFP_NOIO 20 #define SLAB_NOHIGHIO GFP_NOHIGHIO 21 #define SLAB_ATOMIC GFP_ATOMIC 22 #define SLAB_USER GFP_USER 23 #define SLAB_KERNEL GFP_KERNEL 24 #define SLAB_NFS GFP_NFS 25 #define SLAB_DMA GFP_DMA 26 27 #define SLAB_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_HIGHIO|__GFP_FS) 28 #define SLAB_NO_GROW 0x00001000UL /* don't grow a cache */ 29 30 /* flags to pass to kmem_cache_create(). 31 * The first 3 are only valid when the allocator as been build 32 * SLAB_DEBUG_SUPPORT. 33 */ 34 #define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */ 35 #define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */ 36 #define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */ 37 #define SLAB_POISON 0x00000800UL /* Poison objects */ 38 #define SLAB_NO_REAP 0x00001000UL /* never reap from the cache */ 39 #define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */ 40 #define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */ 41 #define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */ 42 43 /* flags passed to a constructor func */ 44 #define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */ 45 #define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */ 46 #define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */ 47 48 /* prototypes */ 49 extern void kmem_cache_init(void); 50 extern void kmem_cache_sizes_init(void); 51 52 extern kmem_cache_t *kmem_find_general_cachep(size_t, int gfpflags); 53 extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long, 54 void (*)(void *, kmem_cache_t *, unsigned long), 55 void (*)(void *, kmem_cache_t *, unsigned long)); 56 extern int kmem_cache_destroy(kmem_cache_t *); 57 extern int kmem_cache_shrink(kmem_cache_t *); 58 extern void *kmem_cache_alloc(kmem_cache_t *, int); 59 extern void kmem_cache_free(kmem_cache_t *, void *); 60 extern unsigned int kmem_cache_size(kmem_cache_t *); 61 62 extern void *kmalloc(size_t, int); 63 extern void kfree(const void *); 64 65 extern int FASTCALL(kmem_cache_reap(int)); 66 67 /* System wide caches */ 68 extern kmem_cache_t *vm_area_cachep; 69 extern kmem_cache_t *mm_cachep; 70 extern kmem_cache_t *names_cachep; 71 extern kmem_cache_t *files_cachep; 72 extern kmem_cache_t *filp_cachep; 73 extern kmem_cache_t *dquot_cachep; 74 extern kmem_cache_t *bh_cachep; 75 extern kmem_cache_t *fs_cachep; 76 extern kmem_cache_t *sigact_cachep; 77 78 #endif /* __KERNEL__ */ 79 80 #endif /* _LINUX_SLAB_H */ 81