Re: [PATCH v3 09/12] RISC-V: User WRITE_ONCE instead of direct access

From: Christoph Hellwig
Date: Mon Sep 10 2018 - 07:27:16 EST

On Thu, Sep 06, 2018 at 01:05:32AM -0700, Atish Patra wrote:
> The secondary harts spin on couple of per cpu variables until both of
> these are non-zero so it's not necessary to have any ordering here.
> However, WRITE_ONCE should be used to avoid tearing.

We normally pair WRITE_ONCE with READ_ONCE. But it seems like the
reader side is in assembly code, so this should be ok:

Reviewed-by: Christoph Hellwig <hch@xxxxxx>