diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 616d1a72ece3..6210b1124929 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c

@@ -2208,11 +2208,11 @@ static void refill_stock(struct mem_cgroup *memcg, unsigned int nr_pages)
  */
 static void drain_all_stock(struct mem_cgroup *root_memcg)
 {
-       static DEFINE_MUTEX(percpu_charge_mutex);
        int cpu, curcpu;
+       static atomic_t drainer = ATOMIC_INIT(0);

        /* If someone's already draining, avoid adding running more workers. */
-       if (!mutex_trylock(&percpu_charge_mutex))
+       if (atomic_cmpxchg(&drainer, 0, 1) != 0)
                return;
        /*
         * Notify other cpus that system-wide "drain" is running

@@ -2244,7 +2244,7 @@ static void drain_all_stock(struct mem_cgroup *root_memcg)
                }
        }
        put_cpu();
-       mutex_unlock(&percpu_charge_mutex);
+       atomic_set(&drainer, 0);