mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-14 16:23:51 +08:00
c1a67fefd0
Allows mempools to be embedded in other structs, getting rid of a pointer indirection from allocation fastpaths. mempool_exit() is safe to call on an uninitialized but zeroed mempool. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* memory buffer pool support
|
|
*/
|
|
#ifndef _LINUX_MEMPOOL_H
|
|
#define _LINUX_MEMPOOL_H
|
|
|
|
#include <linux/wait.h>
|
|
#include <linux/compiler.h>
|
|
|
|
struct kmem_cache;
|
|
|
|
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;
|
|
|
|
static inline bool mempool_initialized(mempool_t *pool)
|
|
{
|
|
return pool->elements != NULL;
|
|
}
|
|
|
|
void mempool_exit(mempool_t *pool);
|
|
int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
|
|
mempool_free_t *free_fn, void *pool_data,
|
|
gfp_t gfp_mask, int node_id);
|
|
int mempool_init(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
|
|
mempool_free_t *free_fn, void *pool_data);
|
|
|
|
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,
|
|
gfp_t gfp_mask, int nid);
|
|
|
|
extern int mempool_resize(mempool_t *pool, int new_min_nr);
|
|
extern void mempool_destroy(mempool_t *pool);
|
|
extern void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask) __malloc;
|
|
extern void mempool_free(void *element, mempool_t *pool);
|
|
|
|
/*
|
|
* A mempool_alloc_t and mempool_free_t that get the memory from
|
|
* a slab cache that is passed in through pool_data.
|
|
* Note: the slab cache may not have a ctor function.
|
|
*/
|
|
void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
|
|
void mempool_free_slab(void *element, void *pool_data);
|
|
|
|
static inline int
|
|
mempool_init_slab_pool(mempool_t *pool, int min_nr, struct kmem_cache *kc)
|
|
{
|
|
return mempool_init(pool, min_nr, mempool_alloc_slab,
|
|
mempool_free_slab, (void *) kc);
|
|
}
|
|
|
|
static inline mempool_t *
|
|
mempool_create_slab_pool(int min_nr, struct kmem_cache *kc)
|
|
{
|
|
return mempool_create(min_nr, mempool_alloc_slab, mempool_free_slab,
|
|
(void *) kc);
|
|
}
|
|
|
|
/*
|
|
* a mempool_alloc_t and a mempool_free_t to kmalloc and kfree the
|
|
* amount of memory specified by pool_data
|
|
*/
|
|
void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data);
|
|
void mempool_kfree(void *element, void *pool_data);
|
|
|
|
static inline int mempool_init_kmalloc_pool(mempool_t *pool, int min_nr, size_t size)
|
|
{
|
|
return mempool_init(pool, min_nr, mempool_kmalloc,
|
|
mempool_kfree, (void *) size);
|
|
}
|
|
|
|
static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size)
|
|
{
|
|
return mempool_create(min_nr, mempool_kmalloc, mempool_kfree,
|
|
(void *) size);
|
|
}
|
|
|
|
/*
|
|
* 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 int mempool_init_page_pool(mempool_t *pool, int min_nr, int order)
|
|
{
|
|
return mempool_init(pool, min_nr, mempool_alloc_pages,
|
|
mempool_free_pages, (void *)(long)order);
|
|
}
|
|
|
|
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 */
|