memcg: remove check for signal_pending() during rmdir()

After bf544fdc241da8 "memcg: move charges to root cgroup if
use_hierarchy=0 in mem_cgroup_move_hugetlb_parent()", no memory reclaim
will occur when removing a memory cgroup.  If -EINTR is returned here,
cgroup will show a warning.

We don't need to handle any user interruption signal.  Remove this.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 1940ba8e6f00c1d10e511b74c0c3a4e206308b03..8062d45ee7f4e5988e4c760a12a01e9b026bd1e1 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3691,9 +3691,6 @@ move_account:
                ret = -EBUSY;
                if (cgroup_task_count(cgrp) || !list_empty(&cgrp->children))
                        goto out;
-               ret = -EINTR;
-               if (signal_pending(current))
-                       goto out;
                /* This is for making all *used* pages to be on LRU. */
                lru_add_drain_all();
                drain_all_stock_sync(memcg);