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| author | Glauber Costa <glommer@parallels.com> | 2012-12-18 14:22:46 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-18 15:02:14 -0800 |
| commit | b9ce5ef49f00daf2254c6953c8d31f79aabccd34 (patch) | |
| tree | 1da6afdbb3dc2e2d31f588dbfbf502e984af48a6 /mm/slab.c | |
| parent | 0e9d92f2d02d8c8320f0502307c688d07bdac2b3 (diff) | |
| download | lwn-b9ce5ef49f00daf2254c6953c8d31f79aabccd34.tar.gz lwn-b9ce5ef49f00daf2254c6953c8d31f79aabccd34.zip | |
sl[au]b: always get the cache from its page in kmem_cache_free()
struct page already has 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: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slab.c')
| -rw-r--r-- | mm/slab.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/slab.c b/mm/slab.c index c26ab9fbe1f5..bab6fec765a7 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -87,7 +87,6 @@ */ #include <linux/slab.h> -#include "slab.h" #include <linux/mm.h> #include <linux/poison.h> #include <linux/swap.h> @@ -128,6 +127,8 @@ #include "internal.h" +#include "slab.h" + /* * DEBUG - 1 for kmem_cache_create() to honour; SLAB_RED_ZONE & SLAB_POISON. * 0 for faster, smaller code (especially in the critical paths). @@ -3883,6 +3884,9 @@ EXPORT_SYMBOL(__kmalloc); void kmem_cache_free(struct kmem_cache *cachep, void *objp) { unsigned long flags; + cachep = cache_from_obj(cachep, objp); + if (!cachep) + return; local_irq_save(flags); debug_check_no_locks_freed(objp, cachep->object_size); |