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, 2 insertions, 2 deletions

diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 11e4235d0b0c..d7cadf304168 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -1829,11 +1829,11 @@ request_queue_t *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
 {
         request_queue_t *q;
 
-        q = kmem_cache_alloc_node(requestq_cachep, gfp_mask, node_id);
+        q = kmem_cache_alloc_node(requestq_cachep,
+                                gfp_mask | __GFP_ZERO, node_id);
         if (!q)
                 return NULL;
 
-        memset(q, 0, sizeof(*q));
         init_timer(&q->unplug_timer);
 
         snprintf(q->kobj.name, KOBJ_NAME_LEN, "%s", "queue");