diff --git a/include/linux/sched.h b/include/linux/sched.h
index 32e309df408ca355ce0a912a4ee2231dfa0ae045..2d1e1a1228ef9c97eb79c1f99cc7cd1c3bbfd26c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -268,7 +268,6 @@ extern void init_idle(struct task_struct *idle, int cpu);
 extern void init_idle_bootup_task(struct task_struct *idle);
 
 extern int runqueue_is_locked(int cpu);
-extern void task_rq_unlock_wait(struct task_struct *p);
 
 extern cpumask_var_t nohz_cpu_mask;
 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
diff --git a/kernel/exit.c b/kernel/exit.c
index 356d91fa095f8bafff7dbca30121d22d246fb5c4..bbc79064650245c0f2e64f3bc352edf4e48cdb5e 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -145,11 +145,6 @@ static void __exit_signal(struct task_struct *tsk)
 	if (sig) {
 		flush_sigqueue(&sig->shared_pending);
 		taskstats_tgid_free(sig);
-		/*
-		 * Make sure ->signal can't go away under rq->lock,
-		 * see account_group_exec_runtime().
-		 */
-		task_rq_unlock_wait(tsk);
 		tty_kref_put(tty);
 	}
 }
diff --git a/kernel/sched.c b/kernel/sched.c
index 054a6012de99b7298d5f92c4b137be17a37335f3..15b93f617fd79219b7d210df086158e176fba477 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -969,14 +969,6 @@ static struct rq *task_rq_lock(struct task_struct *p, unsigned long *flags)
 	}
 }
 
-void task_rq_unlock_wait(struct task_struct *p)
-{
-	struct rq *rq = task_rq(p);
-
-	smp_mb(); /* spin-unlock-wait is not a full memory barrier */
-	raw_spin_unlock_wait(&rq->lock);
-}
-
 static void __task_rq_unlock(struct rq *rq)
 	__releases(rq->lock)
 {