1 files changed, 25 insertions, 0 deletions

diff --git a/kernel/res_counter.c b/kernel/res_counter.c
index 6d269cce7aa1..d508363858b3 100644
--- a/kernel/res_counter.c
+++ b/kernel/res_counter.c
@@ -66,6 +66,31 @@ done:
         return ret;
 }
 
+int res_counter_charge_nofail(struct res_counter *counter, unsigned long val,
+                              struct res_counter **limit_fail_at)
+{
+        int ret, r;
+        unsigned long flags;
+        struct res_counter *c;
+
+        r = ret = 0;
+        *limit_fail_at = NULL;
+        local_irq_save(flags);
+        for (c = counter; c != NULL; c = c->parent) {
+                spin_lock(&c->lock);
+                r = res_counter_charge_locked(c, val);
+                if (r)
+                        c->usage += val;
+                spin_unlock(&c->lock);
+                if (r < 0 && ret == 0) {
+                        *limit_fail_at = c;
+                        ret = r;
+                }
+        }
+        local_irq_restore(flags);
+
+        return ret;
+}
 void res_counter_uncharge_locked(struct res_counter *counter, unsigned long val)
 {
         if (WARN_ON(counter->usage < val))