memcg, kmem: use is_root_cache instead of hard code
authorQiang Huang <h.huangqiang@huawei.com>
Tue, 12 Nov 2013 23:08:22 +0000 (15:08 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 13 Nov 2013 03:09:10 +0000 (12:09 +0900)
Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Glauber Costa <glommer@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memcontrol.c

index c890724..3d28d5a 100644 (file)
@@ -59,6 +59,7 @@
 #include <net/sock.h>
 #include <net/ip.h>
 #include <net/tcp_memcontrol.h>
+#include "slab.h"
 
 #include <asm/uaccess.h>
 
@@ -3131,7 +3132,7 @@ int memcg_update_cache_size(struct kmem_cache *s, int num_groups)
 {
        struct memcg_cache_params *cur_params = s->memcg_params;
 
-       VM_BUG_ON(s->memcg_params && !s->memcg_params->is_root_cache);
+       VM_BUG_ON(!is_root_cache(s));
 
        if (num_groups > memcg_limited_groups_array_size) {
                int i;