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-rw-r--r--kernel/cgroup.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 6cc693b91c4a..09751657abdc 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4317,6 +4317,8 @@ static void __init cgroup_init_subsys(struct cgroup_subsys *ss)
printk(KERN_INFO "Initializing cgroup subsys %s\n", ss->name);
+ mutex_lock(&cgroup_mutex);
+
/* init base cftset */
cgroup_init_cftsets(ss);
@@ -4346,6 +4348,8 @@ static void __init cgroup_init_subsys(struct cgroup_subsys *ss)
if (ss->post_create)
ss->post_create(dummytop);
+ mutex_unlock(&cgroup_mutex);
+
/* this function shouldn't be used with modular subsystems, since they
* need to register a subsys_id, among other things */
BUG_ON(ss->module);