[PATCH] mempool: add mempool_create_slab_pool()

Create a simple wrapper function for the common case of creating a slab-based
mempool.
Signed-off-by: Matthew Dobson <colpatch@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/mempool.h

@@ -6,6 +6,8 @@
 
 #include <linux/wait.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);
 
@@ -37,6 +39,12 @@ 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);
+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);
+}
 
 /*
  * 2 mempool_alloc_t's and a mempool_free_t to kmalloc/kzalloc and kfree