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/*
* memory buffer pool support
*/
#ifndef _LINUX_MEMPOOL_H
#define _LINUX_MEMPOOL_H
#include <linux/wait.h>
typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data);
typedef void (mempool_free_t)(void *element, void *pool_data);
typedef struct mempool_s {
spinlock_t lock;
int min_nr; /* nr of elements at *elements */
int curr_nr; /* Current nr of elements at *elements */
void **elements;
void *pool_data;
mempool_alloc_t *alloc;
mempool_free_t *free;
wait_queue_head_t wait;
} mempool_t;
extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
mempool_free_t *free_fn, void *pool_data);
extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
mempool_free_t *free_fn, void *pool_data, int nid);
extern int mempool_resize(mempool_t *pool, int new_min_nr, gfp_t gfp_mask);
extern void mempool_destroy(mempool_t *pool);
extern void * mempool_alloc(mempool_t *pool, gfp_t gfp_mask);
extern void mempool_free(void *element, mempool_t *pool);
/*
* A mempool_alloc_t and mempool_free_t that get the memory from
* a slab that is passed in through pool_data.
*/
void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
void mempool_free_slab(void *element, void *pool_data);
/*
* A mempool_alloc_t and mempool_free_t for a simple page allocator that
* allocates pages of the order specified by pool_data
*/
void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data);
void mempool_free_pages(void *element, void *pool_data);
static inline mempool_t *mempool_create_page_pool(int min_nr, int order)
{
return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages,
(void *)(long)order);
}
#endif /* _LINUX_MEMPOOL_H */
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