3 * Written by Mark Hemment, 1996.
4 * (markhe@nextd.demon.co.uk)
10 #if defined(__KERNEL__)
12 typedef struct kmem_cache kmem_cache_t;
14 #include <linux/config.h> /* kmalloc_sizes.h needs CONFIG_ options */
15 #include <linux/gfp.h>
16 #include <linux/init.h>
17 #include <linux/types.h>
18 #include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */
19 #include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */
21 /* flags for kmem_cache_alloc() */
22 #define SLAB_NOFS GFP_NOFS
23 #define SLAB_NOIO GFP_NOIO
24 #define SLAB_ATOMIC GFP_ATOMIC
25 #define SLAB_USER GFP_USER
26 #define SLAB_KERNEL GFP_KERNEL
27 #define SLAB_DMA GFP_DMA
29 #define SLAB_LEVEL_MASK GFP_LEVEL_MASK
31 #define SLAB_NO_GROW __GFP_NO_GROW /* don't grow a cache */
33 /* flags to pass to kmem_cache_create().
34 * The first 3 are only valid when the allocator as been build
37 #define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */
38 #define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */
39 #define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */
40 #define SLAB_POISON 0x00000800UL /* Poison objects */
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*/
47 #define SLAB_PANIC 0x00040000UL /* panic if kmem_cache_create() fails */
48 #define SLAB_DESTROY_BY_RCU 0x00080000UL /* defer freeing pages to RCU */
49 #define SLAB_MEM_SPREAD 0x00100000UL /* Spread some memory over cpuset */
51 /* flags passed to a constructor func */
52 #define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */
53 #define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */
54 #define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */
59 extern void __init kmem_cache_init(void);
61 extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long,
62 void (*)(void *, kmem_cache_t *, unsigned long),
63 void (*)(void *, kmem_cache_t *, unsigned long));
64 extern int kmem_cache_destroy(kmem_cache_t *);
65 extern int kmem_cache_shrink(kmem_cache_t *);
66 extern void *kmem_cache_alloc(kmem_cache_t *, gfp_t);
67 extern void *kmem_cache_zalloc(struct kmem_cache *, gfp_t);
68 extern void kmem_cache_free(kmem_cache_t *, void *);
69 extern unsigned int kmem_cache_size(kmem_cache_t *);
70 extern const char *kmem_cache_name(kmem_cache_t *);
71 extern kmem_cache_t *kmem_find_general_cachep(size_t size, gfp_t gfpflags);
73 /* Size description struct for general caches. */
76 kmem_cache_t *cs_cachep;
77 kmem_cache_t *cs_dmacachep;
79 extern struct cache_sizes malloc_sizes[];
81 extern void *__kmalloc(size_t, gfp_t);
82 #ifndef CONFIG_DEBUG_SLAB
83 #define ____kmalloc(size, flags) __kmalloc(size, flags)
85 extern void *__kmalloc_track_caller(size_t, gfp_t, void*);
86 #define ____kmalloc(size, flags) \
87 __kmalloc_track_caller(size, flags, __builtin_return_address(0))
90 static inline void *kmalloc(size_t size, gfp_t flags)
92 if (__builtin_constant_p(size)) {
99 #include "kmalloc_sizes.h"
102 extern void __you_cannot_kmalloc_that_much(void);
103 __you_cannot_kmalloc_that_much();
106 return kmem_cache_alloc((flags & GFP_DMA) ?
107 malloc_sizes[i].cs_dmacachep :
108 malloc_sizes[i].cs_cachep, flags);
110 return __kmalloc(size, flags);
113 extern void *__kzalloc(size_t, gfp_t);
115 static inline void *kzalloc(size_t size, gfp_t flags)
117 if (__builtin_constant_p(size)) {
124 #include "kmalloc_sizes.h"
127 extern void __you_cannot_kzalloc_that_much(void);
128 __you_cannot_kzalloc_that_much();
131 return kmem_cache_zalloc((flags & GFP_DMA) ?
132 malloc_sizes[i].cs_dmacachep :
133 malloc_sizes[i].cs_cachep, flags);
135 return __kzalloc(size, flags);
139 * kcalloc - allocate memory for an array. The memory is set to zero.
140 * @n: number of elements.
141 * @size: element size.
142 * @flags: the type of memory to allocate.
144 static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
146 if (n != 0 && size > ULONG_MAX / n)
148 return kzalloc(n * size, flags);
151 extern void kfree(const void *);
152 extern unsigned int ksize(const void *);
153 extern int slab_is_available(void);
156 extern void *kmem_cache_alloc_node(kmem_cache_t *, gfp_t flags, int node);
157 extern void *kmalloc_node(size_t size, gfp_t flags, int node);
159 static inline void *kmem_cache_alloc_node(kmem_cache_t *cachep, gfp_t flags, int node)
161 return kmem_cache_alloc(cachep, flags);
163 static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
165 return kmalloc(size, flags);
169 extern int FASTCALL(kmem_cache_reap(int));
170 extern int FASTCALL(kmem_ptr_validate(kmem_cache_t *cachep, void *ptr));
172 #else /* CONFIG_SLOB */
174 /* SLOB allocator routines */
176 void kmem_cache_init(void);
177 struct kmem_cache *kmem_find_general_cachep(size_t, gfp_t gfpflags);
178 struct kmem_cache *kmem_cache_create(const char *c, size_t, size_t,
180 void (*)(void *, struct kmem_cache *, unsigned long),
181 void (*)(void *, struct kmem_cache *, unsigned long));
182 int kmem_cache_destroy(struct kmem_cache *c);
183 void *kmem_cache_alloc(struct kmem_cache *c, gfp_t flags);
184 void *kmem_cache_zalloc(struct kmem_cache *, gfp_t);
185 void kmem_cache_free(struct kmem_cache *c, void *b);
186 const char *kmem_cache_name(struct kmem_cache *);
187 void *kmalloc(size_t size, gfp_t flags);
188 void *__kzalloc(size_t size, gfp_t flags);
189 void kfree(const void *m);
190 unsigned int ksize(const void *m);
191 unsigned int kmem_cache_size(struct kmem_cache *c);
193 static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
195 return __kzalloc(n * size, flags);
198 #define kmem_cache_shrink(d) (0)
199 #define kmem_cache_reap(a)
200 #define kmem_ptr_validate(a, b) (0)
201 #define kmem_cache_alloc_node(c, f, n) kmem_cache_alloc(c, f)
202 #define kmalloc_node(s, f, n) kmalloc(s, f)
203 #define kzalloc(s, f) __kzalloc(s, f)
204 #define ____kmalloc kmalloc
206 #endif /* CONFIG_SLOB */
208 /* System wide caches */
209 extern kmem_cache_t *vm_area_cachep;
210 extern kmem_cache_t *names_cachep;
211 extern kmem_cache_t *files_cachep;
212 extern kmem_cache_t *filp_cachep;
213 extern kmem_cache_t *fs_cachep;
214 extern kmem_cache_t *sighand_cachep;
215 extern kmem_cache_t *bio_cachep;
217 extern atomic_t slab_reclaim_pages;
219 #endif /* __KERNEL__ */
221 #endif /* _LINUX_SLAB_H */