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Date:   Wed, 24 Jun 2020 09:52:49 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     "Paul E. McKenney" <paulmck@kernel.org>
Cc:     tglx@linutronix.de, x86@kernel.org, elver@google.com,
        kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org,
        will@kernel.org, dvyukov@google.com, glider@google.com,
        andreyknvl@google.com
Subject: Re: [PATCH 2/9] rcu: Fixup noinstr warnings
Message-ID: <20200624075249.GC4800@hirez.programming.kicks-ass.net>
References: <20200603114014.152292216@infradead.org>
 <20200603114051.896465666@infradead.org>
 <20200615154905.GZ2531@hirez.programming.kicks-ass.net>
 <20200615155513.GG2554@hirez.programming.kicks-ass.net>
 <20200615162427.GI2554@hirez.programming.kicks-ass.net>
 <20200615171404.GI2723@paulmck-ThinkPad-P72>
 <20200619221555.GA12280@paulmck-ThinkPad-P72>
 <20200623204646.GF2483@worktop.programming.kicks-ass.net>
 <20200623214433.GX9247@paulmck-ThinkPad-P72>
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On Tue, Jun 23, 2020 at 02:44:33PM -0700, Paul E. McKenney wrote:
> On Tue, Jun 23, 2020 at 10:46:46PM +0200, Peter Zijlstra wrote:
> > On Fri, Jun 19, 2020 at 03:15:55PM -0700, Paul E. McKenney wrote:
> > 
> > > Just following up because I don't see this anywhere.  If I am supposed
> > > to take this (which is more plausible now that v5.8-rc1 is out), please
> > > let me know.
> > 
> > Sorry, I got distracted by that NULL ptr thing, but that seems sorted
> > now. If you don't mind taking it through your rcu/urgent tree for -rc3
> > or so that would be awesome.
> 
> Will do!
> 
> Just to double-check, this is the patch from you with Message-ID
> 20200603114051.896465666@infradead.org, correct?
> 
> Or, if you prefer, this commit now on -rcu?
> 
> 	5fe289eccfe5 ("rcu: Fixup noinstr warnings")
> 
> If this is the correct commit, I will rebase it on top of v5.8-rc2,
> and if it passes tests, send it along via rcu/urgent.

Ah, I was thinking about:

  https://lore.kernel.org/lkml/20200615162427.GI2554@hirez.programming.kicks-ass.net/

seeing how I added that instrumentation you wanted :-), but either
version should work for now. KCSAN is sad without this.