[Devel] [PATCH v2 02/29] slub: fix slab_state for slub

[Glauber Costa]

When the slub code wants to know if the sysfs state has already been
initialized, it tests for slab_state == SYSFS. This is quite fragile,
since new state can be added in the future (it is, in fact, for
memcg caches). This patch fixes this behavior so the test matches
>= SYSFS, as all other state does.

Signed-off-by: Glauber Costa <glommer at parallels.com>
CC: Christoph Lameter <cl at linux.com>
CC: Pekka Enberg <penberg at cs.helsinki.fi>
---
 mm/slub.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index ffe13fd..226e053 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -5356,7 +5356,7 @@ static int sysfs_slab_alias(struct kmem_cache *s, const char *name)
 {
 	struct saved_alias *al;
 
-	if (slab_state == SYSFS) {
+	if (slab_state >= SYSFS) {
 		/*
 		 * If we have a leftover link then remove it.
 		 */
-- 
1.7.7.6