---

yaml --- r: 166649 b: refs/heads/master c: 3dece83 h: refs/heads/master i: 166647: 53885ae v: v3
git-mirror · Oct 1, 2009 · b0f4311 · b0f4311
1 parent fd75efd
commit b0f4311
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 26251eaf98e26dc2ce2dc26d63bc502700760704
+refs/heads/master: 3dece8347df6a16239fab10dadb370854f1c969c
diff --git a/trunk/kernel/cgroup.c b/trunk/kernel/cgroup.c
@@ -3708,15 +3708,18 @@ static void check_for_release(struct cgroup *cgrp)
 void __css_put(struct cgroup_subsys_state *css)
 {
 	struct cgroup *cgrp = css->cgroup;
+	int val;
 	rcu_read_lock();
-	if (atomic_dec_return(&css->refcnt) == 1) {
+	val = atomic_dec_return(&css->refcnt);
+	if (val == 1) {
 		if (notify_on_release(cgrp)) {
 			set_bit(CGRP_RELEASABLE, &cgrp->flags);
 			check_for_release(cgrp);
 		}
 		cgroup_wakeup_rmdir_waiter(cgrp);
 	}
 	rcu_read_unlock();
+	WARN_ON_ONCE(val < 1);
 }
 
 /*