cregit-Linux how code gets into the kernel

Release 4.12 include/linux/mempool.h

Directory: include/linux
 * memory buffer pool support


#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;

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 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); }


Matthew Dobson32100.00%1100.00%

/* * 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 mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size) { return mempool_create(min_nr, mempool_kmalloc, mempool_kfree, (void *) size); }


Matthew Dobson30100.00%1100.00%

/* * 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); }


Matthew Dobson33100.00%1100.00%

#endif /* _LINUX_MEMPOOL_H */

Overall Contributors

Matthew Dobson14741.64%323.08%
Linus Torvalds13137.11%215.38%
Christoph Lameter246.80%17.69%
Alan Cox236.52%17.69%
Andrew Morton113.12%17.69%
Rasmus Villemoes92.55%17.69%
Al Viro30.85%17.69%
Tejun Heo30.85%17.69%
David Rientjes10.28%17.69%
Sage Weil10.28%17.69%
Directory: include/linux
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