linux-kernel - Re: [RFC PATCH] x86: Use ACCESS_ONCE() for atomic

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Message-ID: <20140922200716.GB3128@worktop.programming.kicks-ass.net>
Date:	Mon, 22 Sep 2014 22:07:16 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Pranith Kumar <bobby.prani@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"maintainer:X86 ARCHITECTURE..." <x86@...nel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	"open list:X86 ARCHITECTURE..." <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] x86: Use ACCESS_ONCE() for atomic_read()

On Mon, Sep 22, 2014 at 03:53:09PM -0400, Pranith Kumar wrote:
> Use the much easier to read ACCESS_ONCE() which is basically the same thing as
> the cast to volatile.
> 
> Please note the change in volatile cast: ACCESS_ONCE(v)->counter to
> ACCESS_ONCE(v->counter).
> 
> Signed-off-by: Pranith Kumar <bobby.prani@...il.com>
> ---
>  arch/x86/include/asm/atomic.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

If you want to do something like so, then be consistent and do them all.
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