1 files changed, 13 insertions, 7 deletions

diff --git a/kernel/res_counter.c b/kernel/res_counter.c
index 3920d593e63..ff55247e704 100644
--- a/kernel/res_counter.c
+++ b/kernel/res_counter.c
@@ -86,33 +86,39 @@ int res_counter_charge_nofail(struct res_counter *counter, unsigned long val,
         return __res_counter_charge(counter, val, limit_fail_at, true);
 }
 
-void res_counter_uncharge_locked(struct res_counter *counter, unsigned long val)
+u64 res_counter_uncharge_locked(struct res_counter *counter, unsigned long val)
 {
         if (WARN_ON(counter->usage < val))
                 val = counter->usage;
 
         counter->usage -= val;
+        return counter->usage;
 }
 
-void res_counter_uncharge_until(struct res_counter *counter,
-                                struct res_counter *top,
-                                unsigned long val)
+u64 res_counter_uncharge_until(struct res_counter *counter,
+                               struct res_counter *top,
+                               unsigned long val)
 {
         unsigned long flags;
         struct res_counter *c;
+        u64 ret = 0;
 
         local_irq_save(flags);
         for (c = counter; c != top; c = c->parent) {
+                u64 r;
                 spin_lock(&c->lock);
-                res_counter_uncharge_locked(c, val);
+                r = res_counter_uncharge_locked(c, val);
+                if (c == counter)
+                        ret = r;
                 spin_unlock(&c->lock);
         }
         local_irq_restore(flags);
+        return ret;
 }
 
-void res_counter_uncharge(struct res_counter *counter, unsigned long val)
+u64 res_counter_uncharge(struct res_counter *counter, unsigned long val)
 {
-        res_counter_uncharge_until(counter, NULL, val);
+        return res_counter_uncharge_until(counter, NULL, val);
 }
 
 static inline unsigned long long *