From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <mst@redhat.com>
Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by lists.ozlabs.org (Postfix) with ESMTPS id A49161A0D83
 for <linuxppc-dev@lists.ozlabs.org>; Tue, 12 Jan 2016 19:43:49 +1100 (AEDT)
Date: Tue, 12 Jan 2016 10:43:36 +0200
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: linux-kernel@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
 Arnd Bergmann <arnd@arndb.de>, linux-arch@vger.kernel.org,
 Andrew Cooper <andrew.cooper3@citrix.com>,
 Russell King - ARM Linux <linux@arm.linux.org.uk>,
 virtualization@lists.linux-foundation.org,
 Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
 Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
 "H. Peter Anvin" <hpa@zytor.com>, Joe Perches <joe@perches.com>,
 David Miller <davem@davemloft.net>, linux-ia64@vger.kernel.org,
 linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
 sparclinux@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
 linux-metag@vger.kernel.org, linux-mips@linux-mips.org, x86@kernel.org,
 user-mode-linux-devel@lists.sourceforge.net,
 adi-buildroot-devel@lists.sourceforge.net, linux-sh@vger.kernel.org,
 linux-xtensa@linux-xtensa.org, xen-devel@lists.xenproject.org,
 Ralf Baechle <ralf@linux-mips.org>, Ingo Molnar <mingo@kernel.org>
Subject: Re: [v3,11/41] mips: reuse asm-generic/barrier.h
Message-ID: <20160112103913-mutt-send-email-mst@redhat.com>
References: <1452426622-4471-12-git-send-email-mst@redhat.com>
 <56945366.2090504@imgtec.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
In-Reply-To: <56945366.2090504@imgtec.com>
List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org>
List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>
List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/>
List-Post: <mailto:linuxppc-dev@lists.ozlabs.org>
List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>
List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>,
 <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>

On Mon, Jan 11, 2016 at 05:14:14PM -0800, Leonid Yegoshin wrote:
> On 01/10/2016 06:18 AM, Michael S. Tsirkin wrote:
> >On mips dma_rmb, dma_wmb, smp_store_mb, read_barrier_depends,
> >smp_read_barrier_depends, smp_store_release and smp_load_acquire  match
> >the asm-generic variants exactly. Drop the local definitions and pull in
> >asm-generic/barrier.h instead.
> >
> This statement doesn't fit MIPS barriers variations. Moreover, there is a
> reason to extend that even more specific, at least for smp_store_release and
> smp_load_acquire, look into
> 
>     http://patchwork.linux-mips.org/patch/10506/
> 
> - Leonid.

Fine, but it matches what current code is doing.  Since that
MIPS_LIGHTWEIGHT_SYNC patch didn't go into linux-next yet, do
you see a problem reworking it on top of this patchset?

-- 
MST