[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/21285.c b/drivers/serial/21285.c
index f8504b0..33fbda7 100644
--- a/drivers/serial/21285.c
+++ b/drivers/serial/21285.c
@@ -110,7 +110,7 @@
port->icount.rx++;
rxs = *CSR_RXSTAT | RXSTAT_DUMMY_READ;
- if (rxs & RXSTAT_ANYERR) {
+ if (unlikely(rxs & RXSTAT_ANYERR)) {
if (rxs & RXSTAT_PARITY)
port->icount.parity++;
else if (rxs & RXSTAT_FRAME)
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++;
diff --git a/drivers/serial/amba-pl011.c b/drivers/serial/amba-pl011.c
index ff658a8..d5cbef3 100644
--- a/drivers/serial/amba-pl011.c
+++ b/drivers/serial/amba-pl011.c
@@ -137,7 +137,7 @@
* out of the main execution path
*/
rsr = readw(uap->port.membase + UART01x_RSR) | 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);
uap->port.icount.brk++;
diff --git a/drivers/serial/clps711x.c b/drivers/serial/clps711x.c
index 16592fa..e145e19 100644
--- a/drivers/serial/clps711x.c
+++ b/drivers/serial/clps711x.c
@@ -116,7 +116,7 @@
* Note that the error handling code is
* out of the main execution path
*/
- if (ch & UART_ANY_ERR)
+ if (unlikely(ch & UART_ANY_ERR))
goto handle_error;
if (uart_handle_sysrq_char(port, ch, regs))
diff --git a/drivers/serial/s3c2410.c b/drivers/serial/s3c2410.c
index bd6782a..435750d 100644
--- a/drivers/serial/s3c2410.c
+++ b/drivers/serial/s3c2410.c
@@ -364,7 +364,7 @@
flag = TTY_NORMAL;
port->icount.rx++;
- if (uerstat & S3C2410_UERSTAT_ANY) {
+ if (unlikely(uerstat & S3C2410_UERSTAT_ANY)) {
dbg("rxerr: port ch=0x%02x, rxs=0x%08x\n",
ch, uerstat);
diff --git a/drivers/serial/serial_lh7a40x.c b/drivers/serial/serial_lh7a40x.c
index 4ce3a41..85cfa08 100644
--- a/drivers/serial/serial_lh7a40x.c
+++ b/drivers/serial/serial_lh7a40x.c
@@ -162,7 +162,7 @@
flag = TTY_NORMAL;
++port->icount.rx;
- if (data & RxError) { /* Quick check, short-circuit */
+ if (unlikely(data & RxError)) { /* Quick check, short-circuit */
if (data & RxBreak) {
data &= ~(RxFramingError | RxParityError);
++port->icount.brk;
