Commit 6e0678f3 authored by Matthew Dobson's avatar Matthew Dobson Committed by Linus Torvalds
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[PATCH] mempool: add page allocator

This will be used by the next patch in the series to replace duplicate
mempool-backed page allocators in 2 places in the kernel.  It is also likely
that there will be more users in the future.
Signed-off-by: default avatarMatthew Dobson <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 8219dd57
......@@ -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 */
......@@ -289,3 +289,21 @@ void mempool_free_slab(void *element, void *pool_data)
kmem_cache_free(mem, element);
* 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);
void mempool_free_pages(void *element, void *pool_data)
int order = (int)(long)pool_data;
__free_pages(element, order);
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