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//lib/modules/2.6.32-754.el6.x86_64/build/include/linux/mbcache.h

/*
  File: linux/mbcache.h

/* Hardwire the number of additional indexes */
#define MB_CACHE_INDEXES_COUNT 1

struct mb_cache_entry {
	struct list_head		e_lru_list;
	struct mb_cache			*e_cache;
	unsigned short			e_used;
	unsigned short			e_queued;
	struct block_device		*e_bdev;
	sector_t			e_block;
	struct list_head		e_block_list;
	struct {
		struct list_head	o_list;
		unsigned int		o_key;
	} e_indexes[0];
};

struct mb_cache_op {
	int (*free)(struct mb_cache_entry *, gfp_t);
};

/* Functions on caches */

struct mb_cache * mb_cache_create(const char *, struct mb_cache_op *, size_t,
				  int, int);
void mb_cache_shrink(struct block_device *);
void mb_cache_destroy(struct mb_cache *);

/* Functions on cache entries */

struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *, gfp_t);
int mb_cache_entry_insert(struct mb_cache_entry *, struct block_device *,
			  sector_t, unsigned int[]);
void mb_cache_entry_release(struct mb_cache_entry *);
void mb_cache_entry_free(struct mb_cache_entry *);
struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *,
					  struct block_device *,
					  sector_t);
#if !defined(MB_CACHE_INDEXES_COUNT) || (MB_CACHE_INDEXES_COUNT > 0)
struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, int,
						 struct block_device *, 
						 unsigned int);
struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *, int,
						struct block_device *, 
						unsigned int);
#endif

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