diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
index 91fee8122acd4..da200e53d60d9 100644
--- a/kernel/rcu/tasks.h
+++ b/kernel/rcu/tasks.h
@@ -402,7 +402,7 @@ static void rcu_tasks_pertask(struct task_struct *t, struct list_head *hop)
 }
 
 /* Processing between scanning taskslist and draining the holdout list. */
-void rcu_tasks_postscan(struct list_head *hop)
+static void rcu_tasks_postscan(struct list_head *hop)
 {
 	/*
 	 * Wait for tasks that are in the process of exiting.  This