linux-kernel - Re: WARNING: suspicious RCU usage: race/events/tlb.h:57 suspicious rcu_dereference

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Date:   Tue, 15 Sep 2020 12:35:39 +0200
From:   peterz@...radead.org
To:     Qian Cai <cai@...hat.com>
Cc:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        rcu@...r.kernel.org, linux-mm <linux-mm@...ck.org>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org, Linux PM <linux-pm@...r.kernel.org>,
        ": Paul E. McKenney" <paulmck@...nel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Will Deacon <will@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Juri Lelli <juri.lelli@...hat.com>
Subject: Re: WARNING: suspicious RCU usage: race/events/tlb.h:57 suspicious
 rcu_dereference_check() usage!

On Mon, Sep 14, 2020 at 01:29:34PM -0400, Qian Cai wrote:
> On Wed, 2020-09-09 at 10:08 +0530, Naresh Kamboju wrote:
> > While booting x86_64 with Linux next 20200908 tag kernel this warning
> > was noticed.
> 
> This pretty much looks like the same issue in:
> 
> https://lore.kernel.org/lkml/20200902035146.GA45826@roeck-us.net/
> 
> Can you revert the patchset to see if it is related?

Don't bother..  I'll be sending patches soon.