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Date:   Thu, 6 Jun 2019 11:04:39 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Andrea Parri <andrea.parri@amarulasolutions.com>
Cc:     torvalds@linux-foundation.org, mingo@kernel.org,
        gregkh@linuxfoundation.org, tglx@linutronix.de, hpa@zytor.com,
        will.deacon@arm.com, linux-kernel@vger.kernel.org,
        linux-tip-commits@vger.kernel.org
Subject: Re: [tip:locking/core] Documentation/atomic_t.txt: Clarify pure
 non-rmw usage
Message-ID: <20190606090439.GK3419@hirez.programming.kicks-ass.net>
References: <20190524115231.GN2623@hirez.programming.kicks-ass.net>
 <tip-fff9b6c7d26943a8eb32b58364b7ec6b9369746a@git.kernel.org>
 <20190606084421.GA5523@andrea>
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On Thu, Jun 06, 2019 at 10:44:21AM +0200, Andrea Parri wrote:
> On Mon, Jun 03, 2019 at 06:46:54AM -0700, tip-bot for Peter Zijlstra wrote:
> > Commit-ID:  fff9b6c7d26943a8eb32b58364b7ec6b9369746a
> > Gitweb:     https://git.kernel.org/tip/fff9b6c7d26943a8eb32b58364b7ec6b9369746a
> > Author:     Peter Zijlstra <peterz@infradead.org>
> > AuthorDate: Fri, 24 May 2019 13:52:31 +0200
> > Committer:  Ingo Molnar <mingo@kernel.org>
> > CommitDate: Mon, 3 Jun 2019 12:32:57 +0200
> > 
> > Documentation/atomic_t.txt: Clarify pure non-rmw usage
> > 
> > Clarify that pure non-RMW usage of atomic_t is pointless, there is
> > nothing 'magical' about atomic_set() / atomic_read().
> > 
> > This is something that seems to confuse people, because I happen upon it
> > semi-regularly.
> > 
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> > Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > Acked-by: Will Deacon <will.deacon@arm.com>
> > Cc: Linus Torvalds <torvalds@linux-foundation.org>
> > Cc: Peter Zijlstra <peterz@infradead.org>
> > Cc: Thomas Gleixner <tglx@linutronix.de>
> > Link: https://lkml.kernel.org/r/20190524115231.GN2623@hirez.programming.kicks-ass.net
> > Signed-off-by: Ingo Molnar <mingo@kernel.org>
> 
> I'd appreciate if you could Cc: me in future changes to this doc.
> (as currently suggested by get_maintainer.pl).
> 
> This is particularly annoying when you spend time to review such
> changes:
> 
>   https://lkml.kernel.org/r/20190528111558.GA9106@andrea

Sure, I hadn't realized the LKMM entry had appropriated this file, I
considered it part of the ATOMIC entry there.