[PATCH v2 04/29] slub: always get the cache from its page in kfree

[Glauber Costa <glommer@parallels.com>]

struct page already have this information. If we start chaining
caches, this information will always be more trustworthy than
whatever is passed into the function

Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: Christoph Lameter <cl@linux.com>
CC: Pekka Enberg <penberg@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 226e053..e606f1b 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2600,7 +2600,7 @@ void kmem_cache_free(struct kmem_cache *s, void *x)
 
 	page = virt_to_head_page(x);
 
-	slab_free(s, page, x, _RET_IP_);
+	slab_free(page->slab, page, x, _RET_IP_);
 
 	trace_kmem_cache_free(_RET_IP_, x);
 }
-- 
1.7.7.6