diff options
| -rw-r--r-- | include/linux/mempool.h | 12 | ||||
| -rw-r--r-- | mm/mempool.c | 18 |
2 files changed, 30 insertions, 0 deletions
diff --git a/include/linux/mempool.h b/include/linux/mempool.h index f2427d7394b..9787572e0ae 100644 --- a/include/linux/mempool.h +++ b/include/linux/mempool.h @@ -38,4 +38,16 @@ extern void mempool_free(void *element, mempool_t *pool); 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 */ diff --git a/mm/mempool.c b/mm/mempool.c index f71893ed354..45c0112ca7b 100644 --- a/mm/mempool.c +++ b/mm/mempool.c @@ -289,3 +289,21 @@ void mempool_free_slab(void *element, void *pool_data) kmem_cache_free(mem, element); } EXPORT_SYMBOL(mempool_free_slab); + +/* + * A simple mempool-backed page allocator that allocates pages + * of the order specified by pool_data. + */ +void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data) +{ + int order = (int)(long)pool_data; + return alloc_pages(gfp_mask, order); +} +EXPORT_SYMBOL(mempool_alloc_pages); + +void mempool_free_pages(void *element, void *pool_data) +{ + int order = (int)(long)pool_data; + __free_pages(element, order); +} +EXPORT_SYMBOL(mempool_free_pages); |