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Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- To: Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx>
- From: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
- Date: Thu, 14 Jan 2016 11:24:01 +0200
- Cc: linux-mips@xxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, sparclinux@xxxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, linux-arch@xxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>, user-mode-linux-devel@xxxxxxxxxxxxxxxxxxxxx, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, x86@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxx>, Paul McKenney <paulmck@xxxxxxxxxxxxxxxxxx>, linux-xtensa@xxxxxxxxxxxxxxxx, james.hogan@xxxxxxxxxx, Arnd Bergmann <arnd@xxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, adi-buildroot-devel@xxxxxxxxxxxxxxxxxxxxx, ddaney.cavm@xxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, linux-metag@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Ralf Baechle <ralf@xxxxxxxxxxxxxx>, Joe Perches <joe@xxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, David Miller <davem@xxxxxxxxxxxxx>
- Delivery-date: Thu, 14 Jan 2016 09:24:24 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On Wed, Jan 13, 2016 at 02:26:16PM -0800, Leonid Yegoshin wrote:
> And all that is out-of-topic here in my mind. I just want to be sure that
> this patchset still provides a use of a specific lightweight SYNCs on MIPS
> vs bold and heavy generalized "SYNC 0" in any case.
>
> - Leonid.
Of course it does. All this patchset does is rename smp_mb/rmb/wmb
to __smp_mb()/__smp_rmb()/__smp_wmb()
and then asm-generic does #define smp_mb __smp_mb
or #define smp_mb barrier depending on CONFIG_SMP.
Why is that needed? So we can implement
[PATCH v3 28/41] asm-generic: implement virt_xxx memory barriers
--
MST
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