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 <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Christoph Lameter <[email protected]>
Reviewed-by: Pekka Enberg <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/slub.c b/mm/slub.c
index 9b861b90cde1ff5f2c2cfc6d3b282158a5f2811d..3e8afcc07a760c552135cfb3c79ac924ee9e5494 100644 (file)
--- 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;
 }