Merge branch 'sched/urgent' into sched/core

Merge reason: Merge dependent fix, update to latest -rc.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 4 insertions, 7 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 488b644e0e8e..954032b80bed 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2586,7 +2586,7 @@ static int mem_cgroup_force_empty(struct mem_cgroup *mem, bool free_all)
         if (free_all)
                 goto try_to_free;
 move_account:
-        while (mem->res.usage > 0) {
+        do {
                 ret = -EBUSY;
                 if (cgroup_task_count(cgrp) || !list_empty(&cgrp->children))
                         goto out;
@@ -2614,8 +2614,8 @@ move_account:
                 if (ret == -ENOMEM)
                         goto try_to_free;
                 cond_resched();
-        }
-        ret = 0;
+        /* "ret" should also be checked to ensure all lists are empty. */
+        } while (mem->res.usage > 0 || ret);
 out:
         css_put(&mem->css);
         return ret;
@@ -2648,10 +2648,7 @@ try_to_free:
         }
         lru_add_drain();
         /* try move_account...there may be some *locked* pages. */
-        if (mem->res.usage)
-                goto move_account;
-        ret = 0;
-        goto out;
+        goto move_account;
 }
 
 int mem_cgroup_force_empty_write(struct cgroup *cont, unsigned int event)