linux-kernel - Re: [PATCH 4.19 000/175] 4.19.312-rc1 review

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Date: Sat, 13 Apr 2024 07:43:03 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Pavel Machek <pavel@...x.de>, stable@...r.kernel.org,
	patches@...ts.linux.dev, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	linux@...ck-us.net, shuah@...nel.org, patches@...nelci.org,
	lkft-triage@...ts.linaro.org, jonathanh@...dia.com,
	f.fainelli@...il.com, sudipm.mukherjee@...il.com,
	srw@...dewatkins.net, rwarsow@....de, conor@...nel.org,
	allen.lkml@...il.com, broonie@...nel.org, maco@...roid.com,
	christophe.jaillet@...adoo.fr, sean.anderson@...ux.dev
Subject: Re: [PATCH 4.19 000/175] 4.19.312-rc1 review

On Fri, Apr 12, 2024 at 10:02:47PM +0200, Thomas Gleixner wrote:
> On Fri, Apr 12 2024 at 21:46, Pavel Machek wrote:
> >> Thomas Gleixner <tglx@...utronix.de>
> >>     timers: Move clearing of base::timer_running under base:: Lock
> >
> > AFAICT, we don't have those NULL assignments in expire_timers in
> > 4.19. Can someone doublecheck this? We also don't support PREEMPT_RT
> > there.
> 
> This has nothing to do with RT.
> 
> But yes, 4.19 has the original bass::running_timer clearing which
> happens at the end of handling all expired timer callbacks and that
> actually happens with base->lock held.
> 
> So right, 4.19 is not affected by this.

Now dropped, thanks.

greg k-h