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Groups > linux.kernel > #1682882

[PATCH 3/3] rtmutex: remove unnecessary adjust prio

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We don't need to adjust prio before new pi_waiter adding. The prio
only need update after pi_waiter change or task priority change.

Signed-off-by: Alex Shi <alex.shi@linaro.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
To: linux-kernel@vger.kernel.org
To: Ingo Molnar <mingo@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
---
 kernel/locking/rtmutex.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 28cd09e..d1fe41f 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -963,7 +963,6 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
 		return -EDEADLK;
 
 	raw_spin_lock(&task->pi_lock);
-	rt_mutex_adjust_prio(task);
 	waiter->task = task;
 	waiter->lock = lock;
 	waiter->prio = task->prio;
-- 
2.7.4

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[PATCH 3/3] rtmutex: remove unnecessary adjust prio Alex Shi <alex.shi@linaro.org> - 2017-07-07 05:00 +0200
  Re: [PATCH 3/3] rtmutex: remove unnecessary adjust prio Alex Shi <alex.shi@linaro.org> - 2017-07-11 16:40 +0200
    Re: [PATCH 3/3] rtmutex: remove unnecessary adjust prio Steven Rostedt <rostedt@goodmis.org> - 2017-07-12 16:20 +0200
      Re: [PATCH 3/3] rtmutex: remove unnecessary adjust prio Peter Zijlstra <peterz@infradead.org> - 2017-07-12 18:40 +0200
        Re: [PATCH 3/3] rtmutex: remove unnecessary adjust prio Alex Shi <alex.shi@linaro.org> - 2017-07-13 08:20 +0200
      Re: [PATCH 3/3] rtmutex: remove unnecessary adjust prio Alex Shi <alex.shi@linaro.org> - 2017-07-13 08:20 +0200

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