[patch 069/173] mm/memcontrol: remove redundant NULL check

From: Yang Li <redacted>
Subject: mm/memcontrol: remove redundant NULL check

Fix below warnings reported by coccicheck:
./mm/memcontrol.c:451:3-9: WARNING: NULL check before some freeing
functions is not needed.

Link: https://lkml.kernel.org/r/1611216029-34397-1-git-send-email-abaci-bugfix@linux.alibaba.com
Signed-off-by: Yang Li <redacted>
Reported-by: Abaci Robot <redacted>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand <redacted>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/mm/memcontrol.c~mm-memcontrol-remove-redundant-null-check
+++ a/mm/memcontrol.c

@@ -452,8 +452,7 @@ static void memcg_free_shrinker_maps(str
 	for_each_node(nid) {
 		pn = mem_cgroup_nodeinfo(memcg, nid);
 		map = rcu_dereference_protected(pn->shrinker_map, true);
-		if (map)
-			kvfree(map);
+		kvfree(map);
 		rcu_assign_pointer(pn->shrinker_map, NULL);
 	}
 }

_