linux-kernel - Re: [PATCH RT 2/3] irq_work: Fix checking of IRQ_WORK_LAZY flag set on non PREEMPT

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Date:   Thu, 2 Apr 2020 19:22:49 +0200
From:   Pavel Machek <pavel@...x.de>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Carsten Emde <C.Emde@...dl.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        John Kacur <jkacur@...hat.com>,
        Julia Cartwright <julia@...com>,
        Daniel Wagner <wagi@...om.org>,
        Tom Zanussi <zanussi@...nel.org>,
        "Srivatsa S. Bhat" <srivatsa@...il.mit.edu>,
        Pavel Machek <pavel@...x.de>
Subject: Re: [PATCH RT 2/3] irq_work: Fix checking of IRQ_WORK_LAZY flag set
 on non PREEMPT_RT

Hi!

> 4.19.106-rt46-rc1 stable review patch.
> If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>
> 
> When CONFIG_PREEMPT_RT_FULL is not set, some of the checks for using
> lazy_list are not properly made as the IRQ_WORK_LAZY is not checked. There's
> two locations that need this update, so a use_lazy_list() helper function is
> added and used in both locations.
> 
> Link: https://lore.kernel.org/r/20200321230028.GA22058@duo.ucw.cz
> Reported-by: Pavel Machek <pavel@...x.de>
> Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>

Looks okay to me, thank you.

Acked-by: Pavel Machek <pavel@...x.de>

I'm currently playing with 4.4.X branch, but I'll eventually test it.

Is it possible that 4.4.X branch needs similar patch? My code review
suggests so...

Best regards, 	      	   	 	     	  	     Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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