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Christoph Lameter97d06602012-07-06 15:25:11 -05001#ifndef MM_SLAB_H
2#define MM_SLAB_H
3/*
4 * Internal slab definitions
5 */
6
7/*
8 * State of the slab allocator.
9 *
10 * This is used to describe the states of the allocator during bootup.
11 * Allocators use this to gradually bootstrap themselves. Most allocators
12 * have the problem that the structures used for managing slab caches are
13 * allocated from slab caches themselves.
14 */
15enum slab_state {
16 DOWN, /* No slab functionality yet */
17 PARTIAL, /* SLUB: kmem_cache_node available */
18 PARTIAL_ARRAYCACHE, /* SLAB: kmalloc size for arraycache available */
19 PARTIAL_L3, /* SLAB: kmalloc size for l3 struct available */
20 UP, /* Slab caches usable but not all extras yet */
21 FULL /* Everything is working */
22};
23
24extern enum slab_state slab_state;
25
Christoph Lameter18004c52012-07-06 15:25:12 -050026/* The slab cache mutex protects the management structures during changes */
27extern struct mutex slab_mutex;
Christoph Lameter9b030cb2012-09-05 00:20:33 +000028
29/* The list of all slab caches on the system */
Christoph Lameter18004c52012-07-06 15:25:12 -050030extern struct list_head slab_caches;
31
Christoph Lameter9b030cb2012-09-05 00:20:33 +000032/* The slab cache that manages slab cache information */
33extern struct kmem_cache *kmem_cache;
34
35/* Functions provided by the slab allocators */
Christoph Lameter8a13a4c2012-09-04 23:18:33 +000036extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags);
Christoph Lameter97d06602012-07-06 15:25:11 -050037
Christoph Lametercbb79692012-09-05 00:18:32 +000038#ifdef CONFIG_SLUB
39struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
40 size_t align, unsigned long flags, void (*ctor)(void *));
41#else
42static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
43 size_t align, unsigned long flags, void (*ctor)(void *))
44{ return NULL; }
45#endif
46
47
Christoph Lameter945cf2b2012-09-04 23:18:33 +000048int __kmem_cache_shutdown(struct kmem_cache *);
Christoph Lameter945cf2b2012-09-04 23:18:33 +000049
Christoph Lameter97d06602012-07-06 15:25:11 -050050#endif