From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz@infradead.org>
Subject: Re: [v3,11/41] mips: reuse asm-generic/barrier.h
Date: Tue, 12 Jan 2016 10:51:38 +0100
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: linux-mips@linux-mips.org, linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, virtualization@lists.linux-foundation.org, "H. Peter Anvin" <hpa@zytor.com>, sparclinux@vger.kernel.org, Ingo Molnar <mingo@kernel.org>, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Russell King - ARM Linux <linux@arm.linux.org.uk>, Arnd Bergmann <arnd@arndb.de>, x86@kernel.org, xen-devel@lists.xenproject.org, Ingo Molnar <mingo@elte.hu>, linux-xtensa@linux-xtensa.org, user-mode-linux-devel@lists.sourceforge.net, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, adi-buildroot-devel@lists.sourceforge.net, Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>, Thomas Gleixner <tglx@linutronix.de>, linux-metag@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Andrew Cooper <andrew.cooper3@citrix.com>, linux-kernel@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>
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On Tue, Jan 12, 2016 at 10:43:36AM +0200, Michael S. Tsirkin wrote:
> 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?

That patch is a complete doorstop atm. It needs a lot more work before
it can go anywhere. Don't worry about it.