Messages in this thread | | | Date | Wed, 21 Mar 2018 08:38:06 -0500 | From | Shiraz Saleem <> | Subject | Re: [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 <okaya@codeaurora.org>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
| |