LXR linux/mm/slab.h

   1#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
  26/* The slab cache mutex protects the management structures during changes */
  27extern struct mutex slab_mutex;
  28
  29/* The list of all slab caches on the system */
  30extern struct list_head slab_caches;
  31
  32/* The slab cache that manages slab cache information */
  33extern struct kmem_cache *kmem_cache;
  34
  35/* Functions provided by the slab allocators */
  36extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags);
  37
  38#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
  48int __kmem_cache_shutdown(struct kmem_cache *);
  49
  50#endif
  51