udp: dynamically size hash tables at boot time

[mv-sheeva.git] / kernel / cgroup.c

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index d2b88596efde65b56524c505bb091314dce3f139..ca83b73fba195ac643a594f9cae3abf4347c2f42 100644 (file)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3708,8 +3708,10 @@ 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);
@@ -3717,6 +3719,7 @@ void __css_put(struct cgroup_subsys_state *css)
                cgroup_wakeup_rmdir_waiter(cgrp);
        }
        rcu_read_unlock();
+       WARN_ON_ONCE(val < 1);
 }
 
 /*