On Thu, 13 Apr 2017 22:02:54 +0800
Alex Shi <[email protected]> wrote:

> We don't need to adjust prio before new pi_waiter adding. The prio
> only need update after pi_waiter change or task normal_prio change.
> 
> Signed-off-by: Alex Shi <[email protected]>
> Cc: Steven Rostedt <[email protected]>
> Cc: Sebastian Siewior <[email protected]>
> To: [email protected]
> To: Ingo Molnar <[email protected]>
> To: Peter Zijlstra <[email protected]>
> Cc: Thomas Gleixner <[email protected]>
> ---
>  kernel/locking/rtmutex.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
> index 05ff685..3ee8bc1 100644
> --- a/kernel/locking/rtmutex.c
> +++ b/kernel/locking/rtmutex.c
> @@ -973,7 +973,6 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
>               return -EDEADLK;
>  
>       raw_spin_lock(&task->pi_lock);
> -     __rt_mutex_adjust_prio(task);

Yeah, I'm not sure why this is called here.

-- Steve

>       waiter->task = task;
>       waiter->lock = lock;
>       waiter->prio = task->prio;

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