Re: [RESEND][PATCH v9 2/7] locking/mutex: Make mutex::wait_lock irq safe

[Valentin Schneider]

On 01/04/24 16:44, John Stultz wrote:
> From: Juri Lelli <juri.lelli@xxxxxxxxxx>
>
> mutex::wait_lock might be nested under rq->lock.
>
> Make it irq safe then.
>
> Cc: Joel Fernandes <joelaf@xxxxxxxxxx>
> Cc: Qais Yousef <qyousef@xxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Juri Lelli <juri.lelli@xxxxxxxxxx>
> Cc: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
> Cc: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
> Cc: Valentin Schneider <vschneid@xxxxxxxxxx>
> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Cc: Ben Segall <bsegall@xxxxxxxxxx>
> Cc: Zimuzo Ezeozue <zezeozue@xxxxxxxxxx>
> Cc: Youssef Esmat <youssefesmat@xxxxxxxxxx>
> Cc: Mel Gorman <mgorman@xxxxxxx>
> Cc: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
> Cc: Will Deacon <will@xxxxxxxxxx>
> Cc: Waiman Long <longman@xxxxxxxxxx>
> Cc: Boqun Feng <boqun.feng@xxxxxxxxx>
> Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxx>
> Cc: Metin Kaya <Metin.Kaya@xxxxxxx>
> Cc: Xuewen Yan <xuewen.yan94@xxxxxxxxx>
> Cc: K Prateek Nayak <kprateek.nayak@xxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: kernel-team@xxxxxxxxxxx
> Tested-by: K Prateek Nayak <kprateek.nayak@xxxxxxx>

Reviewed-by: Valentin Schneider <vschneid@xxxxxxxxxx>

> Signed-off-by: Juri Lelli <juri.lelli@xxxxxxxxxx>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
> [rebase & fix {un,}lock_wait_lock helpers in ww_mutex.h]
> Signed-off-by: Connor O'Brien <connoro@xxxxxxxxxx>
> Signed-off-by: John Stultz <jstultz@xxxxxxxxxx>