linux-kernel - [PATCH 4.4 08/38] rtmutex: Remove unused argument from rt_mutex_proxy

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Date:   Mon,  8 Feb 2021 16:00:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 4.4 08/38] rtmutex: Remove unused argument from rt_mutex_proxy_unlock()

From: Lee Jones <lee.jones@...aro.org>

From: Thomas Gleixner <tglx@...utronix.de>

[ Upstream commit 2156ac1934166d6deb6cd0f6ffc4c1076ec63697 ]
Nothing uses the argument. Remove it as preparation to use
pi_state_update_owner().

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: stable@...r.kernel.org
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 kernel/futex.c                  |    2 +-
 kernel/locking/rtmutex.c        |    3 +--
 kernel/locking/rtmutex_common.h |    3 +--
 3 files changed, 3 insertions(+), 5 deletions(-)

--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -878,7 +878,7 @@ static void free_pi_state(struct futex_p
 		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)
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -1662,8 +1662,7 @@ void rt_mutex_init_proxy_locked(struct r
  * 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);
--- a/kernel/locking/rtmutex_common.h
+++ b/kernel/locking/rtmutex_common.h
@@ -101,8 +101,7 @@ 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);