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Date:   Thu, 12 Jul 2018 11:34:32 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Andrea Parri <andrea.parri@amarulasolutions.com>
Cc:     Will Deacon <will.deacon@arm.com>,
        Alan Stern <stern@rowland.harvard.edu>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        LKMM Maintainers -- Akira Yokosawa <akiyks@gmail.com>,
        Boqun Feng <boqun.feng@gmail.com>,
        Daniel Lustig <dlustig@nvidia.com>,
        David Howells <dhowells@redhat.com>,
        Jade Alglave <j.alglave@ucl.ac.uk>,
        Luc Maranget <luc.maranget@inria.fr>,
        Nicholas Piggin <npiggin@gmail.com>,
        Kernel development list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] tools/memory-model: Add extra ordering for locks and
 remove it for ordinary release/acquire
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On Thu, Jul 12, 2018 at 09:40:40AM +0200, Peter Zijlstra wrote:
> And I think if we raise atomic*_acquire() to require TSO (but ideally
> raise it to RCsc) we're there.

To clarify, just the RmW-acquire. Things like atomic_read_acquire() can
stay smp_load_acquire() and be RCpc.