linux-kernel - Re: [v3,11/41] mips: reuse asm-generic/barrier.h

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Date:	Mon, 11 Jan 2016 17:14:14 -0800
From:	Leonid Yegoshin <Leonid.Yegoshin@...tec.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>,
	<linux-kernel@...r.kernel.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Arnd Bergmann <arnd@...db.de>, <linux-arch@...r.kernel.org>,
	Andrew Cooper <andrew.cooper3@...rix.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	<virtualization@...ts.linux-foundation.org>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Joe Perches <joe@...ches.com>,
	David Miller <davem@...emloft.net>,
	<linux-ia64@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
	<linux-s390@...r.kernel.org>, <sparclinux@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-metag@...r.kernel.org>, <linux-mips@...ux-mips.org>,
	<x86@...nel.org>, <user-mode-linux-devel@...ts.sourceforge.net>,
	<adi-buildroot-devel@...ts.sourceforge.net>,
	<linux-sh@...r.kernel.org>, <linux-xtensa@...ux-xtensa.org>,
	<xen-devel@...ts.xenproject.org>,
	"Ralf Baechle" <ralf@...ux-mips.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [v3,11/41] mips: reuse asm-generic/barrier.h

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.