diff -Naur a/include/linux/init_task.h b/include/linux/init_task.h
--- a/include/linux/init_task.h	2012-10-09 14:42:04.000000000 +0200
+++ b/include/linux/init_task.h	2012-10-08 18:14:11.000000000 +0200
@@ -123,6 +123,8 @@
 
 extern struct cred init_cred;
 
+#ifndef CONFIG_SCHED_BFS
+
 extern struct task_group root_task_group;
 
 #ifdef CONFIG_CGROUP_SCHED
@@ -132,6 +134,8 @@
 # define INIT_CGROUP_SCHED(tsk)
 #endif
 
+#endif
+	
 #ifdef CONFIG_PERF_EVENTS
 # define INIT_PERF_EVENTS(tsk)						\
 	.perf_event_mutex = 						\
diff -Naur a/include/linux/sched.h b/include/linux/sched.h
--- a/include/linux/sched.h	2012-10-09 14:42:04.000000000 +0200
+++ b/include/linux/sched.h	2012-10-08 18:36:50.000000000 +0200
@@ -1264,6 +1264,11 @@
 	const struct sched_class *sched_class;
 	struct sched_entity se;
 	struct sched_rt_entity rt;
+
+#ifdef CONFIG_CGROUP_SCHED
+	struct task_group *sched_task_group;
+#endif
+
 #endif
 
 #ifdef CONFIG_PREEMPT_NOTIFIERS