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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | /* * linux/mm/slab.h * Written by Mark Hemment, 1996. * (markhe@nextd.demon.co.uk) */ #if !defined(_LINUX_SLAB_H) #define _LINUX_SLAB_H #if defined(__KERNEL__) typedef struct kmem_cache_s kmem_cache_t; #include <linux/__KEEPIDENTS__I.h> /* kmalloc_sizes.h needs CONFIG_ options */ #include <linux/__KEEPIDENTS__J.h> #include <linux/__KEEPIDENTS__BA.h> #include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */ #include <asm/cache.h> /* 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_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS|\ __GFP_COLD|__GFP_NOWARN|__GFP_REPEAT|\ __GFP_NOFAIL|__GFP_NORETRY) #define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */ /* flags to pass to kmem_cache_create(). * The first 3 are only valid when the allocator as been build * SLAB_DEBUG_SUPPORT. */ #define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */ #define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */ #define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */ #define SLAB_POISON 0x00000800UL /* Poison objects */ #define SLAB_NO_REAP 0x00001000UL /* never reap from the cache */ #define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */ #define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */ #define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */ #define SLAB_STORE_USER 0x00010000UL /* store the last owner for bug hunting */ #define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* track pages allocated to indicate what is reclaimable later*/ /* flags passed to a constructor func */ #define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */ #define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */ #define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */ /* prototypes */ extern void kmem_cache_init(void); extern kmem_cache_t *kmem_find_general_cachep(size_t, int gfpflags); 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 *, int); extern void kmem_cache_free(kmem_cache_t *, void *); extern unsigned int kmem_cache_size(kmem_cache_t *); /* Size description struct for general caches. */ struct cache_sizes { size_t cs_size; kmem_cache_t *cs_cachep; kmem_cache_t *cs_dmacachep; }; extern struct cache_sizes malloc_sizes[]; extern void *__kmalloc(size_t, int); static inline void *kmalloc(size_t size, int flags) { 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((flags & GFP_DMA) ? malloc_sizes[i].cs_dmacachep : malloc_sizes[i].cs_cachep, flags); } return __kmalloc(size, flags); } extern void kfree(const void *); extern unsigned int ksize(const void *); extern int FASTCALL(kmem_cache_reap(int)); /* System wide caches */ extern kmem_cache_t *vm_area_cachep; extern kmem_cache_t *mm_cachep; extern kmem_cache_t *names_cachep; extern kmem_cache_t *files_cachep; extern kmem_cache_t *filp_cachep; extern kmem_cache_t *dquot_cachep; extern kmem_cache_t *fs_cachep; extern kmem_cache_t *signal_cachep; extern kmem_cache_t *sighand_cachep; extern kmem_cache_t *bio_cachep; void ptrinfo(unsigned long addr); extern atomic_t slab_reclaim_pages; #endif /* __KERNEL__ */ #endif /* _LINUX_SLAB_H */ |