linux-kernel - Re: [PATCH -v3 8/8] locking, tile: Provide TILE specific smp_acquire__after_ctrl

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Message-ID: <dde0ba6f-be60-17f6-c01d-fc6ff983840a@mellanox.com>
Date:	Tue, 31 May 2016 11:32:01 -0400
From:	Chris Metcalf <cmetcalf@...lanox.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	<linux-kernel@...r.kernel.org>, <torvalds@...ux-foundation.org>,
	<manfred@...orfullife.com>, <dave@...olabs.net>,
	<paulmck@...ux.vnet.ibm.com>, <will.deacon@....com>
CC:	<boqun.feng@...il.com>, <Waiman.Long@....com>, <tj@...nel.org>,
	<pablo@...filter.org>, <kaber@...sh.net>, <davem@...emloft.net>,
	<oleg@...hat.com>, <netfilter-devel@...r.kernel.org>,
	<sasha.levin@...cle.com>, <hofrat@...dl.org>
Subject: Re: [PATCH -v3 8/8] locking, tile: Provide TILE specific
 smp_acquire__after_ctrl_dep

On 5/31/2016 5:41 AM, Peter Zijlstra wrote:
> Since TILE doesn't do read speculation, its control dependencies also
> guarantee LOAD->LOAD order and we don't need the additional RMB
> otherwise required to provide ACQUIRE semantics.
>
> Cc: Chris Metcalf<cmetcalf@...lanox.com>
> Signed-off-by: Peter Zijlstra (Intel)<peterz@...radead.org>
> ---
>   arch/tile/include/asm/barrier.h |    7 +++++++
>   1 file changed, 7 insertions(+)

Looks good.

Acked-by: Chris Metcalf <cmetcalf@...lanox.com>

-- 
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com