[patch 013/123] slab: initialize unused alien cache entry as NULL at alloc_alien_cache().

[Greg KH]

2.6.33-stable review patch.  If anyone has any objections, please let me know.

-----------------

From: Haicheng Li <haicheng.li@xxxxxxxxxxxxxxx>

commit f3186a9c51eabe75b2780153ed7f07778d78b16e upstream.

Comparing with existing code, it's a simpler way to use kzalloc_node()
to ensure that each unused alien cache entry is NULL.

CC: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Acked-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Acked-by: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Matt Mackall <mpm@xxxxxxxxxxx>
Signed-off-by: Haicheng Li <haicheng.li@xxxxxxxxxxxxxxx>
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 mm/slab.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/mm/slab.c
+++ b/mm/slab.c
@@ -983,13 +983,11 @@ static struct array_cache **alloc_alien_
 
 	if (limit > 1)
 		limit = 12;
-	ac_ptr = kmalloc_node(memsize, gfp, node);
+	ac_ptr = kzalloc_node(memsize, gfp, node);
 	if (ac_ptr) {
 		for_each_node(i) {
-			if (i == node || !node_online(i)) {
-				ac_ptr[i] = NULL;
+			if (i == node || !node_online(i))
 				continue;
-			}
 			ac_ptr[i] = alloc_arraycache(node, limit, 0xbaadf00d, gfp);
 			if (!ac_ptr[i]) {
 				for (i--; i >= 0; i--)


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