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/lib/genalloc.c b/lib/genalloc.c
index eb7c2bab9ebf..f6d276db2d58 100644
--- a/lib/genalloc.c
+++ b/lib/genalloc.c
@@ -54,11 +54,10 @@ int gen_pool_add(struct gen_pool *pool, unsigned long addr, size_t size,
         int nbytes = sizeof(struct gen_pool_chunk) +
                                 (nbits + BITS_PER_BYTE - 1) / BITS_PER_BYTE;
 
-        chunk = kmalloc_node(nbytes, GFP_KERNEL, nid);
+        chunk = kmalloc_node(nbytes, GFP_KERNEL | __GFP_ZERO, nid);
         if (unlikely(chunk == NULL))
                 return -1;
 
-        memset(chunk, 0, nbytes);
         spin_lock_init(&chunk->lock);
         chunk->start_addr = addr;
         chunk->end_addr = addr + size;