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

From: "Michael S. Tsirkin" <[email-masked]>
Date: Thu, 14 Jan 2016 11:24:01 +0200

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