On Tue, Nov 03, 2015 at 09:01:06AM -0600, 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.

Signed-off-by: Timur Tabi <redacted>
Reviewed-by: Peter Hurley <redacted>
---
 drivers/tty/serial/amba-pl011.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

Doesn't apply to my tree :(