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

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Date:	Mon, 22 Sep 2014 16:20:08 -0400
From:	Pranith Kumar <bobby.prani@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
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 4:07 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> 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.

Sure, I will change this in all architectures and send in an updated patch.

Thanks!
-- 
Pranith
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