[PATCH] cgroup: Export cgroup_is_descendant()

[Jan Kara]

CFQ IO scheduler will use cgroup_is_descendant() to decide whether one
queue can preempt another once.

Signed-off-by: Jan Kara <jack@xxxxxxx>
---
 kernel/cgroup.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index f1603c153890..6b61f847b040 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -477,6 +477,7 @@ bool cgroup_is_descendant(struct cgroup *cgrp, struct cgroup *ancestor)
 	}
 	return false;
 }
+EXPORT_SYMBOL_GPL(cgroup_is_descendant);
 
 static int notify_on_release(const struct cgroup *cgrp)
 {
-- 
2.1.4


--liOOAslEiF7prFVr--
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