Commit-ID: 69f0d429c413fe96db2c187475cebcc6e3a8c7f5 Gitweb: http://git.kernel.org/tip/69f0d429c413fe96db2c187475cebcc6e3a8c7f5 Author: Alex Shi <alex....@linaro.org> AuthorDate: Thu, 13 Jul 2017 14:18:24 +0800 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Thu, 13 Jul 2017 11:44:06 +0200
locking/rtmutex: Remove unnecessary priority adjustment We don't need to adjust priority before adding a new pi_waiter, the priority only needs to be updated after pi_waiter change or task priority change. Steven Rostedt pointed out: "Interesting, I did some git mining and this was added with the original entry of the rtmutex.c (23f78d4a03c5). Looking at even that version, I don't see the purpose of adjusting the task prio here. It is done before anything changes in the task." Signed-off-by: Alex Shi <alex....@linaro.org> Reviewed-by: Steven Rostedt (VMware) <rost...@goodmis.org> Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org> Cc: Juri Lelli <juri.le...@arm.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Mathieu Poirier <mathieu.poir...@linaro.org> Cc: Sebastian Siewior <bige...@linutronix.de> Cc: Steven Rostedt <rost...@goodmis.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/1499926704-28841-1-git-send-email-alex....@linaro.org [ Enhance the changelog. ] Signed-off-by: Ingo Molnar <mi...@kernel.org> --- kernel/locking/rtmutex.c | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index 7806989..649dc9d 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;
