linux-old/include/linux/slab.h
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   1/*
   2 * linux/mm/slab.h
   3 * Written by Mark Hemment, 1996.
   4 * (markhe@nextd.demon.co.uk)
   5 */
   6
   7#if     !defined(_LINUX_SLAB_H)
   8#define _LINUX_SLAB_H
   9
  10#if     defined(__KERNEL__)
  11
  12typedef struct kmem_cache_s kmem_cache_t;
  13
  14#include        <linux/mm.h>
  15#include        <linux/cache.h>
  16
  17/* flags for kmem_cache_alloc() */
  18#define SLAB_NOFS               GFP_NOFS
  19#define SLAB_NOIO               GFP_NOIO
  20#define SLAB_NOHIGHIO           GFP_NOHIGHIO
  21#define SLAB_ATOMIC             GFP_ATOMIC
  22#define SLAB_USER               GFP_USER
  23#define SLAB_KERNEL             GFP_KERNEL
  24#define SLAB_NFS                GFP_NFS
  25#define SLAB_DMA                GFP_DMA
  26
  27#define SLAB_LEVEL_MASK         (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_HIGHIO|__GFP_FS)
  28#define SLAB_NO_GROW            0x00001000UL    /* don't grow a cache */
  29
  30/* flags to pass to kmem_cache_create().
  31 * The first 3 are only valid when the allocator as been build
  32 * SLAB_DEBUG_SUPPORT.
  33 */
  34#define SLAB_DEBUG_FREE         0x00000100UL    /* Peform (expensive) checks on free */
  35#define SLAB_DEBUG_INITIAL      0x00000200UL    /* Call constructor (as verifier) */
  36#define SLAB_RED_ZONE           0x00000400UL    /* Red zone objs in a cache */
  37#define SLAB_POISON             0x00000800UL    /* Poison objects */
  38#define SLAB_NO_REAP            0x00001000UL    /* never reap from the cache */
  39#define SLAB_HWCACHE_ALIGN      0x00002000UL    /* align objs on a h/w cache lines */
  40#define SLAB_CACHE_DMA          0x00004000UL    /* use GFP_DMA memory */
  41#define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL    /* force alignment */
  42
  43/* flags passed to a constructor func */
  44#define SLAB_CTOR_CONSTRUCTOR   0x001UL         /* if not set, then deconstructor */
  45#define SLAB_CTOR_ATOMIC        0x002UL         /* tell constructor it can't sleep */
  46#define SLAB_CTOR_VERIFY        0x004UL         /* tell constructor it's a verify call */
  47
  48/* prototypes */
  49extern void kmem_cache_init(void);
  50extern void kmem_cache_sizes_init(void);
  51
  52extern kmem_cache_t *kmem_find_general_cachep(size_t, int gfpflags);
  53extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long,
  54                                       void (*)(void *, kmem_cache_t *, unsigned long),
  55                                       void (*)(void *, kmem_cache_t *, unsigned long));
  56extern int kmem_cache_destroy(kmem_cache_t *);
  57extern int kmem_cache_shrink(kmem_cache_t *);
  58extern void *kmem_cache_alloc(kmem_cache_t *, int);
  59extern void kmem_cache_free(kmem_cache_t *, void *);
  60extern unsigned int kmem_cache_size(kmem_cache_t *);
  61
  62extern void *kmalloc(size_t, int);
  63extern void kfree(const void *);
  64
  65extern int FASTCALL(kmem_cache_reap(int));
  66
  67/* System wide caches */
  68extern kmem_cache_t     *vm_area_cachep;
  69extern kmem_cache_t     *mm_cachep;
  70extern kmem_cache_t     *names_cachep;
  71extern kmem_cache_t     *files_cachep;
  72extern kmem_cache_t     *filp_cachep;
  73extern kmem_cache_t     *dquot_cachep;
  74extern kmem_cache_t     *bh_cachep;
  75extern kmem_cache_t     *fs_cachep;
  76extern kmem_cache_t     *sigact_cachep;
  77
  78#endif  /* __KERNEL__ */
  79
  80#endif  /* _LINUX_SLAB_H */
  81
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