Re: [v3,11/41] mips: reuse asm-generic/barrier.h
From: Michael S. Tsirkin
Date: Thu Jan 14 2016 - 04:24:23 EST
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
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