[PATCH] Serial: Ensure error paths are marked with unlikely()
Ensure ARM serial driver error paths are marked with the
unlikely() compiler hint.
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c
index 484f6fb..f2a5e29 100644
--- a/drivers/serial/amba-pl010.c
+++ b/drivers/serial/amba-pl010.c
@@ -172,7 +172,7 @@
* out of the main execution path
*/
rsr = UART_GET_RSR(port) | UART_DUMMY_RSR_RX;
- if (rsr & UART01x_RSR_ANY) {
+ if (unlikely(rsr & UART01x_RSR_ANY)) {
if (rsr & UART01x_RSR_BE) {
rsr &= ~(UART01x_RSR_FE | UART01x_RSR_PE);
port->icount.brk++;