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422 giacomo 1 
/*
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 * linux/mm/slab.h
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 * Written by Mark Hemment, 1996.
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 * (markhe@nextd.demon.co.uk)
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 */
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#if     !defined(_LINUX_SLAB_H)
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#define _LINUX_SLAB_H
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#if     defined(__KERNEL__)
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typedef struct kmem_cache_s kmem_cache_t;
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#include        <linux/config.h>        /* kmalloc_sizes.h needs CONFIG_ options */
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#include        <linux/gfp.h>
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#include        <linux/types.h>
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#include        <asm/page.h>            /* kmalloc_sizes.h needs PAGE_SIZE */
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#include        <asm/cache.h>           /* kmalloc_sizes.h needs L1_CACHE_BYTES */
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/* flags for kmem_cache_alloc() */
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#define SLAB_NOFS               GFP_NOFS
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#define SLAB_NOIO               GFP_NOIO
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#define SLAB_ATOMIC             GFP_ATOMIC
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#define SLAB_USER               GFP_USER
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#define SLAB_KERNEL             GFP_KERNEL
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#define SLAB_DMA                GFP_DMA
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#define SLAB_LEVEL_MASK         (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS|\
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                                __GFP_COLD|__GFP_NOWARN|__GFP_REPEAT|\
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                                __GFP_NOFAIL|__GFP_NORETRY)
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#define SLAB_NO_GROW            __GFP_NO_GROW   /* don't grow a cache */
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/* flags to pass to kmem_cache_create().
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 * The first 3 are only valid when the allocator as been build
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 * SLAB_DEBUG_SUPPORT.
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 */
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#define SLAB_DEBUG_FREE         0x00000100UL    /* Peform (expensive) checks on free */
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#define SLAB_DEBUG_INITIAL      0x00000200UL    /* Call constructor (as verifier) */
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#define SLAB_RED_ZONE           0x00000400UL    /* Red zone objs in a cache */
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#define SLAB_POISON             0x00000800UL    /* Poison objects */
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#define SLAB_NO_REAP            0x00001000UL    /* never reap from the cache */
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#define SLAB_HWCACHE_ALIGN      0x00002000UL    /* align objs on a h/w cache lines */
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#define SLAB_CACHE_DMA          0x00004000UL    /* use GFP_DMA memory */
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#define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL    /* force alignment */
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#define SLAB_STORE_USER         0x00010000UL    /* store the last owner for bug hunting */
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#define SLAB_RECLAIM_ACCOUNT    0x00020000UL    /* track pages allocated to indicate
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                                                   what is reclaimable later*/
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/* flags passed to a constructor func */
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#define SLAB_CTOR_CONSTRUCTOR   0x001UL         /* if not set, then deconstructor */
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#define SLAB_CTOR_ATOMIC        0x002UL         /* tell constructor it can't sleep */
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#define SLAB_CTOR_VERIFY        0x004UL         /* tell constructor it's a verify call */
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/* prototypes */
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extern void kmem_cache_init(void);
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extern kmem_cache_t *kmem_find_general_cachep(size_t, int gfpflags);
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extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long,
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                                       void (*)(void *, kmem_cache_t *, unsigned long),
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                                       void (*)(void *, kmem_cache_t *, unsigned long));
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extern int kmem_cache_destroy(kmem_cache_t *);
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extern int kmem_cache_shrink(kmem_cache_t *);
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extern void *kmem_cache_alloc(kmem_cache_t *, int);
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extern void kmem_cache_free(kmem_cache_t *, void *);
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extern unsigned int kmem_cache_size(kmem_cache_t *);
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/* Size description struct for general caches. */
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struct cache_sizes {
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        size_t           cs_size;
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        kmem_cache_t    *cs_cachep;
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        kmem_cache_t    *cs_dmacachep;
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};
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extern struct cache_sizes malloc_sizes[];
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extern void *__kmalloc(size_t, int);
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static inline void *kmalloc(size_t size, int flags)
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{
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        return __kmalloc(size, flags);
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}
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extern void kfree(const void *);
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extern unsigned int ksize(const void *);
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extern int FASTCALL(kmem_cache_reap(int));
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/* System wide caches */
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extern kmem_cache_t     *vm_area_cachep;
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extern kmem_cache_t     *mm_cachep;
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extern kmem_cache_t     *names_cachep;
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extern kmem_cache_t     *files_cachep;
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extern kmem_cache_t     *filp_cachep;
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extern kmem_cache_t     *dquot_cachep;
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extern kmem_cache_t     *fs_cachep;
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extern kmem_cache_t     *signal_cachep;
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extern kmem_cache_t     *sighand_cachep;
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extern kmem_cache_t     *bio_cachep;
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void ptrinfo(unsigned long addr);
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extern atomic_t slab_reclaim_pages;
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#endif  /* __KERNEL__ */
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#endif  /* _LINUX_SLAB_H */