On Sun, Mar 25, 2018 at 7:39 AM, Sinan Kaya [off-list ref] wrote:

Code includes wmb() followed by writel(). writel() already has a barrier on
some architectures like arm64.

This ends up CPU observing two barriers back to back before executing the
register write.

Create a new wrapper function with relaxed write operator. Use the new
wrapper when a write is following a wmb().

Since code already has an explicit barrier call, changing writel() to
writel_relaxed().

Also add mmiowb() so that write code doesn't move outside of scope.

This line in the patch description is not needed anymore.  Other than that,

Acked-by: Michael Chan <michael.chan@broadcom.com>

Thanks.

Signed-off-by: Sinan Kaya <redacted>