diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index c2ec6c77874e..5673008b61e1 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -113,8 +113,6 @@ struct rcu_data {
 
 DECLARE_PER_CPU(struct rcu_data, rcu_data);
 DECLARE_PER_CPU(struct rcu_data, rcu_bh_data);
-extern struct rcu_ctrlblk rcu_ctrlblk;
-extern struct rcu_ctrlblk rcu_bh_ctrlblk;
 
 /*
  * Increment the quiescent state counter.
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index af8a2a57e17d..6df1559b1c02 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -50,13 +50,13 @@
 #include <linux/mutex.h>
 
 /* Definition for rcupdate control block. */
-struct rcu_ctrlblk rcu_ctrlblk = {
+static struct rcu_ctrlblk rcu_ctrlblk = {
 	.cur = -300,
 	.completed = -300,
 	.lock = SPIN_LOCK_UNLOCKED,
 	.cpumask = CPU_MASK_NONE,
 };
-struct rcu_ctrlblk rcu_bh_ctrlblk = {
+static struct rcu_ctrlblk rcu_bh_ctrlblk = {
 	.cur = -300,
 	.completed = -300,
 	.lock = SPIN_LOCK_UNLOCKED,