linux-kernel - Re: [PATCH] x86: use WRITE_ONCE/READ_ONCE in smp_store_release/smp_load

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Message-ID: <20150801171820.GP2859@worktop.programming.kicks-ass.net>
Date:	Sat, 1 Aug 2015 19:18:20 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andrey Konovalov <andreyknvl@...gle.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	"David S. Miller" <davem@...emloft.net>,
	Alexander Duyck <alexander.h.duyck@...hat.com>,
	Borislav Petkov <bp@...e.de>, linux-kernel@...r.kernel.org,
	Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [PATCH] x86: use WRITE_ONCE/READ_ONCE in
 smp_store_release/smp_load_acquire

On Sat, Aug 01, 2015 at 06:45:34PM +0200, Andrey Konovalov wrote:
> Replace ACCESS_ONCE() macro in smp_store_release() and smp_load_acquire()
> from arch/x86/include/asm/barrier.h with WRITE_ONCE() and READ_ONCE() since
> ACCESS_ONCE does not work reliably on non-scalar types.
> 
> WRITE_ONCE() and READ_ONCE() were introduced in the commits 230fa253df63
> ("kernel: Provide READ_ONCE and ASSIGN_ONCE") and 43239cbe79fc ("kernel:
> Change ASSIGN_ONCE(val, x) to WRITE_ONCE(x, val)").

Please do all relevant archs.
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