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

From: Glauber Costa
Date: Fri May 11 2012 - 13:57:38 EST

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@xxxxxxxxxxxxx>
CC: Christoph Lameter <cl@xxxxxxxxx>
CC: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
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.

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