mm/mempool.c: convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)

Use the helper function instead of __GFP_ZERO.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/mempool.c

@@ -73,7 +73,7 @@ mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
 			       gfp_t gfp_mask, int node_id)
 {
 	mempool_t *pool;
-	pool = kmalloc_node(sizeof(*pool), gfp_mask | __GFP_ZERO, node_id);
+	pool = kzalloc_node(sizeof(*pool), gfp_mask, node_id);
 	if (!pool)
 		return NULL;
 	pool->elements = kmalloc_node(min_nr * sizeof(void *),