diff --git a/kernel/futex.c b/kernel/futex.c
index 391a85dcd46c..40b9ba24bd9a 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -883,7 +883,7 @@ static void put_pi_state(struct futex_pi_state *pi_state)
 		list_del_init(&pi_state->list);
 		raw_spin_unlock_irq(&pi_state->owner->pi_lock);
 
-		rt_mutex_proxy_unlock(&pi_state->pi_mutex, pi_state->owner);
+		rt_mutex_proxy_unlock(&pi_state->pi_mutex);
 	}
 
 	if (current->pi_state_cache)
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index d295821ed4cc..6ff4156b3929 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -1696,8 +1696,7 @@ void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
  * No locking. Caller has to do serializing itself
  * Special API call for PI-futex support
  */
-void rt_mutex_proxy_unlock(struct rt_mutex *lock,
-			   struct task_struct *proxy_owner)
+void rt_mutex_proxy_unlock(struct rt_mutex *lock)
 {
 	debug_rt_mutex_proxy_unlock(lock);
 	rt_mutex_set_owner(lock, NULL);
diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h
index 09991287491d..bea5d677fe34 100644
--- a/kernel/locking/rtmutex_common.h
+++ b/kernel/locking/rtmutex_common.h
@@ -102,8 +102,7 @@ enum rtmutex_chainwalk {
 extern struct task_struct *rt_mutex_next_owner(struct rt_mutex *lock);
 extern void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
 				       struct task_struct *proxy_owner);
-extern void rt_mutex_proxy_unlock(struct rt_mutex *lock,
-				  struct task_struct *proxy_owner);
+extern void rt_mutex_proxy_unlock(struct rt_mutex *lock);
 extern int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
 				     struct rt_mutex_waiter *waiter,
 				     struct task_struct *task);