Commit 53184082 authored by Matthew Dobson's avatar Matthew Dobson Committed by Linus Torvalds
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[PATCH] mempool: add kmalloc allocator 



Add another allocator to the common mempool code: a kmalloc/kfree allocator

This will be used by the next patch in the series to replace duplicate
mempool-backed kmalloc allocators in several places in the kernel.  It is also
very likely that there will be more users in the future.

Signed-off-by: default avatarMatthew Dobson <colpatch@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent a19b27ce

include/linux/mempool.h

+12 −0
Original line number Diff line number Diff line
@@ -38,6 +38,18 @@ 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 to kmalloc 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);

}



/*

 * A mempool_alloc_t and mempool_free_t for a simple page allocator that

 * allocates pages of the order specified by pool_data

mm/mempool.c

+17 −0
Original line number Diff line number Diff line
@@ -290,6 +290,23 @@ void mempool_free_slab(void *element, void *pool_data) 
}

EXPORT_SYMBOL(mempool_free_slab);



/*

 * A commonly used alloc and free fn that kmalloc/kfrees the amount of memory

 * specfied by pool_data

 */

void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data)

{

	size_t size = (size_t) pool_data;

	return kmalloc(size, gfp_mask);

}

EXPORT_SYMBOL(mempool_kmalloc);



void mempool_kfree(void *element, void *pool_data)

{

	kfree(element);

}

EXPORT_SYMBOL(mempool_kfree);



/*

 * A simple mempool-backed page allocator that allocates pages

 * of the order specified by pool_data.

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