Re: [PATCH v2] arch: use WRITE_ONCE/READ_ONCE in smp_store_release/smp_load_acquire
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- To: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
- Subject: Re: [PATCH v2] arch: use WRITE_ONCE/READ_ONCE in smp_store_release/smp_load_acquire
- From: Davidlohr Bueso <dave@xxxxxxxxxxxx>
- Date: Sun, 02 Aug 2015 13:50:31 -0700
- Cc: Russell King <linux@xxxxxxxxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>, James Hogan <james.hogan@xxxxxxxxxx>, Ralf Baechle <ralf@xxxxxxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Martin Schwidefsky <schwidefsky@xxxxxxxxxx>, Heiko Carstens <heiko.carstens@xxxxxxxxxx>, linux390@xxxxxxxxxx, "David S. Miller" <davem@xxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, x86@xxxxxxxxxx, Arnd Bergmann <arnd@xxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Alexander Duyck <alexander.h.duyck@xxxxxxxxxx>, Andre Przywara <andre.przywara@xxxxxxx>, "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>, Borislav Petkov <bp@xxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-metag@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, Dmitry Vyukov <dvyukov@xxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxx>
- In-reply-to: <1438528264-714-1-git-send-email-andreyknvl@google.com>
- List-id: <linux-ia64.vger.kernel.org>
- References: <1438528264-714-1-git-send-email-andreyknvl@google.com>
On Sun, 2015-08-02 at 17:11 +0200, Andrey Konovalov wrote:
> Replace ACCESS_ONCE() macro in smp_store_release() and smp_load_acquire()
> with WRITE_ONCE() and READ_ONCE() on x86, arm, arm64, ia64, metag, mips,
> powerpc, s390, sparc and asm-generic 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)").
>
> Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Acked-by: Davidlohr Bueso <dbueso@xxxxxxx>
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