[PATCH v4 3/6] RDMA/i40iw: Eliminate duplicate barriers on weakly-ordered archs

On Mon, Mar 19, 2018 at 08:47:45PM -0600, Sinan Kaya 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().

Signed-off-by: Sinan Kaya <redacted>

Acked-by: Shiraz Saleem <redacted>