linux-kernel - Re: [PATCH] locking/xchg/alpha: Remove memory barriers from the

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Message-ID: <20180228105810.GB7681@arm.com>
Date:   Wed, 28 Feb 2018 10:58:11 +0000
From:   Will Deacon <will.deacon@....com>
To:     Andrea Parri <parri.andrea@...il.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Matt Turner <mattst88@...il.com>,
        Richard Henderson <rth@...ddle.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-alpha@...r.kernel.org
Subject: Re: [PATCH] locking/xchg/alpha: Remove memory barriers from the
 _local() variants

On Tue, Feb 27, 2018 at 09:08:31PM +0100, Andrea Parri wrote:
> [+ Will]
> 
> I'm not sure how this happened; Will, you at least figure as Reported-by: ;-)

Thanks, this looks better to me. Have you build an Alpha kernel to check
that the various cmpxchg variants are producing the expected asm?

Will