Re: [v3,11/41] mips: reuse asm-generic/barrier.h
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- To: Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx>
- Subject: Re: [v3,11/41] mips: reuse asm-generic/barrier.h
- From: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
- Date: Tue, 12 Jan 2016 10:43:36 +0200
- Cc: linux-kernel@xxxxxxxxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, linux-arch@xxxxxxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Joe Perches <joe@xxxxxxxxxxx>, David Miller <davem@xxxxxxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-metag@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxx, x86@xxxxxxxxxx, user-mode-linux-devel@xxxxxxxxxxxxxxxxxxxxx, adi-buildroot-devel@xxxxxxxxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, linux-xtensa@xxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, Ralf Baechle <ralf@xxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>
- In-reply-to: <56945366.2090504@imgtec.com>
- List-id: <linux-ia64.vger.kernel.org>
- References: <1452426622-4471-12-git-send-email-mst@redhat.com> <56945366.2090504@imgtec.com>
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
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