diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index e2c5841..6aa212f 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7252,6 +7252,7 @@
 
 #ifdef CONFIG_CGROUP_SCHED
 struct task_group root_task_group;
+LIST_HEAD(task_groups);
 #endif
 
 DECLARE_PER_CPU(cpumask_var_t, load_balance_tmpmask);
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 531411b..f6714d0 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -80,7 +80,7 @@
 struct cfs_rq;
 struct rt_rq;
 
-static LIST_HEAD(task_groups);
+extern struct list_head task_groups;
 
 struct cfs_bandwidth {
 #ifdef CONFIG_CFS_BANDWIDTH