slub: remove kmemcg id from create_unique_id

This function is never called for memcg caches, because they are
unmergeable, so remove the dead code.

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Lameter <cl@linux.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 6 deletions

diff --git a/mm/slub.c b/mm/slub.c
index 9b861b90cde1..3e8afcc07a76 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -5128,12 +5128,6 @@ static char *create_unique_id(struct kmem_cache *s)
                 *p++ = '-';
         p += sprintf(p, "%07d", s->size);
 
-#ifdef CONFIG_MEMCG_KMEM
-        if (!is_root_cache(s))
-                p += sprintf(p, "-%08d",
-                                memcg_cache_id(s->memcg_params->memcg));
-#endif
-
         BUG_ON(p > name + ID_STR_LENGTH - 1);
         return name;
 }