Slab allocators: Replace explicit zeroing with __GFP_ZERO

kmalloc_node() and kmem_cache_alloc_node() were not available in a zeroing
variant in the past.  But with __GFP_ZERO it is possible now to do zeroing
while allocating.

Use __GFP_ZERO to remove the explicit clearing of memory via memset whereever
we can.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/mm/mempool.c b/mm/mempool.c
index 3e8f1fed0e1f..02d5ec3feabc 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -62,10 +62,9 @@ mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
                         mempool_free_t *free_fn, void *pool_data, int node_id)
 {
         mempool_t *pool;
-        pool = kmalloc_node(sizeof(*pool), GFP_KERNEL, node_id);
+        pool = kmalloc_node(sizeof(*pool), GFP_KERNEL | __GFP_ZERO, node_id);
         if (!pool)
                 return NULL;
-        memset(pool, 0, sizeof(*pool));
         pool->elements = kmalloc_node(min_nr * sizeof(void *),
                                         GFP_KERNEL, node_id);
         if (!pool->elements) {