mm: memcg/slab: remove redundant check in memcg_accumulate_slabinfo()

memcg_accumulate_slabinfo() is never called with a non-root kmem_cache as
a first argument, so the is_root_cache(s) check is redundant and can be
removed without any functional change.

Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20200623174037.3951353-17-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/slab_common.c b/mm/slab_common.c
index a9f6ab4..ad67a03 100644 (file)
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1104,9 +1104,6 @@ memcg_accumulate_slabinfo(struct kmem_cache *s, struct slabinfo *info)
        struct kmem_cache *c;
        struct slabinfo sinfo;
 
-       if (!is_root_cache(s))
-               return;
-
        c = memcg_cache(s);
        if (c) {
                memset(&sinfo, 0, sizeof(sinfo));