linux-kernel - Re: [PATCH 04/36] cpuidle,intel_idle: Fix CPUIDLE_FLAG_IRQ

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Message-ID: <20220730181639.GS2860372@paulmck-ThinkPad-P17-Gen-1>
Date:   Sat, 30 Jul 2022 11:16:39 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Michel Lespinasse <michel@...pinasse.org>
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Subject: Re: [PATCH 04/36] cpuidle,intel_idle: Fix CPUIDLE_FLAG_IRQ_ENABLE

On Sat, Jul 30, 2022 at 02:40:32AM -0700, Michel Lespinasse wrote:
> On Fri, Jul 29, 2022 at 08:26:22AM -0700, Paul E. McKenney wrote:> Would you be willing to try another shot in the dark, but untested
> > this time?  I freely admit that this is getting strange.
> > 
> > 							Thanx, Paul
> 
> Yes, adding this second change got rid of the boot time warning for me.

OK, I will make a real patch.  May I have your Tested-by?

							Thanx, Paul

> > ------------------------------------------------------------------------
> > 
> > diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c
> > index e374c0c923dae..279f557bf60bb 100644
> > --- a/kernel/sched/clock.c
> > +++ b/kernel/sched/clock.c
> > @@ -394,7 +394,7 @@ notrace void sched_clock_tick(void)
> >  	if (!static_branch_likely(&sched_clock_running))
> >  		return;
> >  
> > -	lockdep_assert_irqs_disabled();
> > +	WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) && !raw_irqs_disabled());
> >  
> >  	scd = this_scd();
> >  	__scd_stamp(scd);