[PATCH 1/2] serial: amba-pl011: use cpu_relax when polling registers
From: Peter Hurley <hidden>
Date: 2015-11-06 01:14:23
Also in:
linux-serial
On 11/03/2015 10:01 AM, Timur Tabi wrote:
Busy loops that poll on a register should call cpu_relax(). On some architectures, it can lower CPU power consumption or yield to a hyperthreaded twin processor. It also serves as a compiler barrier, so it can replace barrier() calls.
Reviewed-by: Peter Hurley <redacted>