On Sun, Mar 25, 2018 at 7:39 AM, Sinan Kaya <okaya@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxx> Thanks. > > Signed-off-by: Sinan Kaya <okaya@xxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
