diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index a59ca05..3e2f5d4 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -84,6 +84,7 @@
 long rcu_batches_completed(void);
 long rcu_batches_completed_bh(void);
 long rcu_batches_completed_sched(void);
+void show_rcu_gp_kthreads(void);
 
 void rcu_force_quiescent_state(void);
 void rcu_bh_force_quiescent_state(void);