197d06609SChristoph Lameter #ifndef MM_SLAB_H 297d06609SChristoph Lameter #define MM_SLAB_H 397d06609SChristoph Lameter /* 497d06609SChristoph Lameter * Internal slab definitions 597d06609SChristoph Lameter */ 697d06609SChristoph Lameter 797d06609SChristoph Lameter /* 897d06609SChristoph Lameter * State of the slab allocator. 997d06609SChristoph Lameter * 1097d06609SChristoph Lameter * This is used to describe the states of the allocator during bootup. 1197d06609SChristoph Lameter * Allocators use this to gradually bootstrap themselves. Most allocators 1297d06609SChristoph Lameter * have the problem that the structures used for managing slab caches are 1397d06609SChristoph Lameter * allocated from slab caches themselves. 1497d06609SChristoph Lameter */ 1597d06609SChristoph Lameter enum slab_state { 1697d06609SChristoph Lameter DOWN, /* No slab functionality yet */ 1797d06609SChristoph Lameter PARTIAL, /* SLUB: kmem_cache_node available */ 1897d06609SChristoph Lameter PARTIAL_ARRAYCACHE, /* SLAB: kmalloc size for arraycache available */ 1997d06609SChristoph Lameter PARTIAL_L3, /* SLAB: kmalloc size for l3 struct available */ 2097d06609SChristoph Lameter UP, /* Slab caches usable but not all extras yet */ 2197d06609SChristoph Lameter FULL /* Everything is working */ 2297d06609SChristoph Lameter }; 2397d06609SChristoph Lameter 2497d06609SChristoph Lameter extern enum slab_state slab_state; 2597d06609SChristoph Lameter 2618004c5dSChristoph Lameter /* The slab cache mutex protects the management structures during changes */ 2718004c5dSChristoph Lameter extern struct mutex slab_mutex; 289b030cb8SChristoph Lameter 299b030cb8SChristoph Lameter /* The list of all slab caches on the system */ 3018004c5dSChristoph Lameter extern struct list_head slab_caches; 3118004c5dSChristoph Lameter 329b030cb8SChristoph Lameter /* The slab cache that manages slab cache information */ 339b030cb8SChristoph Lameter extern struct kmem_cache *kmem_cache; 349b030cb8SChristoph Lameter 359b030cb8SChristoph Lameter /* Functions provided by the slab allocators */ 3697d06609SChristoph Lameter struct kmem_cache *__kmem_cache_create(const char *name, size_t size, 3797d06609SChristoph Lameter size_t align, unsigned long flags, void (*ctor)(void *)); 3897d06609SChristoph Lameter 39*cbb79694SChristoph Lameter #ifdef CONFIG_SLUB 40*cbb79694SChristoph Lameter struct kmem_cache *__kmem_cache_alias(const char *name, size_t size, 41*cbb79694SChristoph Lameter size_t align, unsigned long flags, void (*ctor)(void *)); 42*cbb79694SChristoph Lameter #else 43*cbb79694SChristoph Lameter static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t size, 44*cbb79694SChristoph Lameter size_t align, unsigned long flags, void (*ctor)(void *)) 45*cbb79694SChristoph Lameter { return NULL; } 46*cbb79694SChristoph Lameter #endif 47*cbb79694SChristoph Lameter 48*cbb79694SChristoph Lameter 49945cf2b6SChristoph Lameter int __kmem_cache_shutdown(struct kmem_cache *); 50945cf2b6SChristoph Lameter 5197d06609SChristoph Lameter #endif 52