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, 3 insertions, 6 deletions

diff --git a/mm/allocpercpu.c b/mm/allocpercpu.c
index b2486cf887a0..00b02623f008 100644
--- a/mm/allocpercpu.c
+++ b/mm/allocpercpu.c
@@ -53,12 +53,9 @@ void *percpu_populate(void *__pdata, size_t size, gfp_t gfp, int cpu)
         int node = cpu_to_node(cpu);
 
         BUG_ON(pdata->ptrs[cpu]);
-        if (node_online(node)) {
-                /* FIXME: kzalloc_node(size, gfp, node) */
-                pdata->ptrs[cpu] = kmalloc_node(size, gfp, node);
-                if (pdata->ptrs[cpu])
-                        memset(pdata->ptrs[cpu], 0, size);
-        } else
+        if (node_online(node))
+                pdata->ptrs[cpu] = kmalloc_node(size, gfp|__GFP_ZERO, node);
+        else
                 pdata->ptrs[cpu] = kzalloc(size, gfp);
         return pdata->ptrs[cpu];
 }