linux-kernel - Re: [PATCH RFC 3/4] barriers: convert a control to a data dependency

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Message-ID: <20190102210024.GJ6310@bombadil.infradead.org>
Date:   Wed, 2 Jan 2019 13:00:24 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Jason Wang <jasowang@...hat.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Andrea Parri <andrea.parri@...rulasolutions.com>,
        Will Deacon <will.deacon@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Nicholas Piggin <npiggin@...il.com>,
        David Howells <dhowells@...hat.com>,
        Jade Alglave <j.alglave@....ac.uk>,
        Luc Maranget <luc.maranget@...ia.fr>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Akira Yokosawa <akiyks@...il.com>,
        Daniel Lustig <dlustig@...dia.com>, linux-arch@...r.kernel.org,
        netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        Jonathan Corbet <corbet@....net>,
        Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        linux-doc@...r.kernel.org, linux-alpha@...r.kernel.org,
        linux-sparse@...r.kernel.org
Subject: Re: [PATCH RFC 3/4] barriers: convert a control to a data dependency

On Wed, Jan 02, 2019 at 03:57:58PM -0500, Michael S. Tsirkin wrote:
> @@ -875,6 +893,8 @@ to the CPU containing it.  See the section on "Multicopy atomicity"
>  for more information.
>  
>  
> +
> +
>  In summary:
>  
>    (*) Control dependencies can order prior loads against later stores.

Was this hunk intentional?