[PATCH 2/3] mm/memcg: set pos to prev unconditionally

[Wei Yang <richard.weiyang@xxxxxxxxx>]

Current code set pos to prev based on condition (prev && !reclaim),
while we can do this unconditionally.

Since:

  * If !reclaim, pos is the same as prev no matter it is NULL or not.
  * If reclaim, pos would be set properly from iter->position.

Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
---
 mm/memcontrol.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9464fe2aa329..03399146168f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -980,7 +980,7 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root,
 	struct mem_cgroup_reclaim_iter *iter;
 	struct cgroup_subsys_state *css = NULL;
 	struct mem_cgroup *memcg = NULL;
-	struct mem_cgroup *pos = NULL;
+	struct mem_cgroup *pos = prev;
 
 	if (mem_cgroup_disabled())
 		return NULL;
@@ -988,9 +988,6 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root,
 	if (!root)
 		root = root_mem_cgroup;
 
-	if (prev && !reclaim)
-		pos = prev;
-
 	rcu_read_lock();
 
 	if (reclaim) {
-- 
2.33.1