3 * Written by Mark Hemment, 1996.
4 * (markhe@nextd.demon.co.uk)
7 #if !defined(_LINUX_SLAB_H)
10 #if defined(__KERNEL__)
12 typedef struct kmem_cache_s kmem_cache_t;
14 #include <linux/config.h> /* kmalloc_sizes.h needs CONFIG_ options */
15 #include <linux/gfp.h>
16 #include <linux/types.h>
17 #include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */
18 #include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */
20 /* flags for kmem_cache_alloc() */
21 #define SLAB_NOFS GFP_NOFS
22 #define SLAB_NOIO GFP_NOIO
23 #define SLAB_ATOMIC GFP_ATOMIC
24 #define SLAB_USER GFP_USER
25 #define SLAB_KERNEL GFP_KERNEL
26 #define SLAB_DMA GFP_DMA
28 #define SLAB_LEVEL_MASK GFP_LEVEL_MASK
30 #define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */
32 /* flags to pass to kmem_cache_create().
33 * The first 3 are only valid when the allocator as been build
36 #define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */
37 #define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */
38 #define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */
39 #define SLAB_POISON 0x00000800UL /* Poison objects */
40 #define SLAB_NO_REAP 0x00001000UL /* never reap from the cache */
41 #define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */
42 #define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */
43 #define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */
44 #define SLAB_STORE_USER 0x00010000UL /* store the last owner for bug hunting */
45 #define SLAB_RECLAIM_ACCOUNT 0x00020000UL /* track pages allocated to indicate
46 what is reclaimable later*/
48 /* flags passed to a constructor func */
49 #define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */
50 #define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */
51 #define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */
54 extern void kmem_cache_init(void);
56 extern kmem_cache_t *kmem_find_general_cachep(size_t, int gfpflags);
57 extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long,
58 void (*)(void *, kmem_cache_t *, unsigned long),
59 void (*)(void *, kmem_cache_t *, unsigned long));
60 extern int kmem_cache_destroy(kmem_cache_t *);
61 extern int kmem_cache_shrink(kmem_cache_t *);
62 extern void *kmem_cache_alloc(kmem_cache_t *, int);
63 extern void kmem_cache_free(kmem_cache_t *, void *);
64 extern unsigned int kmem_cache_size(kmem_cache_t *);
66 /* Size description struct for general caches. */
69 kmem_cache_t *cs_cachep;
70 kmem_cache_t *cs_dmacachep;
72 extern struct cache_sizes malloc_sizes[];
73 extern void *__kmalloc(size_t, int);
75 static inline void *kmalloc(size_t size, int flags)
77 if (__builtin_constant_p(size)) {
84 #include "kmalloc_sizes.h"
87 extern void __you_cannot_kmalloc_that_much(void);
88 __you_cannot_kmalloc_that_much();
91 return kmem_cache_alloc((flags & GFP_DMA) ?
92 malloc_sizes[i].cs_dmacachep :
93 malloc_sizes[i].cs_cachep, flags);
95 return __kmalloc(size, flags);
98 extern void kfree(const void *);
99 extern unsigned int ksize(const void *);
101 extern int FASTCALL(kmem_cache_reap(int));
102 extern int FASTCALL(kmem_ptr_validate(kmem_cache_t *cachep, void *ptr));
104 /* System wide caches */
105 extern kmem_cache_t *vm_area_cachep;
106 extern kmem_cache_t *mm_cachep;
107 extern kmem_cache_t *names_cachep;
108 extern kmem_cache_t *files_cachep;
109 extern kmem_cache_t *filp_cachep;
110 extern kmem_cache_t *dquot_cachep;
111 extern kmem_cache_t *fs_cachep;
112 extern kmem_cache_t *signal_cachep;
113 extern kmem_cache_t *sighand_cachep;
114 extern kmem_cache_t *bio_cachep;
116 void ptrinfo(unsigned long addr);
118 extern atomic_t slab_reclaim_pages;
120 #endif /* __KERNEL__ */
122 #endif /* _LINUX_SLAB_H */