1 files changed, 3 insertions, 2 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index be45d2f6008a..cace83ddbcdc 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3746,12 +3746,13 @@ static void check_for_release(struct cgroup *cgrp)
         }
 }
 
-void __css_put(struct cgroup_subsys_state *css)
+/* Caller must verify that the css is not for root cgroup */
+void __css_put(struct cgroup_subsys_state *css, int count)
 {
         struct cgroup *cgrp = css->cgroup;
         int val;
         rcu_read_lock();
-        val = atomic_dec_return(&css->refcnt);
+        val = atomic_sub_return(count, &css->refcnt);
         if (val == 1) {
                 if (notify_on_release(cgrp)) {
                         set_bit(CGRP_RELEASABLE, &cgrp->flags);