diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 5987dccdb2a0..3fe21e19c96e 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2402,7 +2402,6 @@ struct file_operations proc_cgroup_operations = {
 static int proc_cgroupstats_show(struct seq_file *m, void *v)
 {
 	int i;
-	struct cgroupfs_root *root;
 
 	seq_puts(m, "#subsys_name\thierarchy\tnum_cgroups\n");
 	mutex_lock(&cgroup_mutex);