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

Use the helper function instead of __GFP_ZERO.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/mempool.c b/mm/mempool.c
index 5499047..659aa42 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -73,7 +73,7 @@
 			       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 *),