Techwizz/kernel-fxtec-pro1x
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[PATCH] Serial: Ensure error paths are marked with unlikely()

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Ensure ARM serial driver error paths are marked with the
unlikely() compiler hint.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
This commit is contained in:
Russell King 2005-04-26 15:29:44 +01:00
parent b453257f05
commit 45849282bf
6 changed files with 6 additions and 6 deletions
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2
drivers/serial/21285.c
View file

@ -110,7 +110,7 @@ static irqreturn_t serial21285_rx_chars(int irq, void *dev_id, struct pt_regs *r
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)

2
drivers/serial/amba-pl010.c
View file

@ -172,7 +172,7 @@ pl010_rx_chars(struct uart_port *port)
* 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++;

2
drivers/serial/amba-pl011.c
View file

@ -137,7 +137,7 @@ pl011_rx_chars(struct uart_amba_port *uap)
* 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++;

2
drivers/serial/clps711x.c
View file

@ -116,7 +116,7 @@ static irqreturn_t clps711xuart_int_rx(int irq, void *dev_id, struct pt_regs *re
* 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))

2
drivers/serial/s3c2410.c
View file

@ -364,7 +364,7 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id, struct pt_regs *regs)
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);

2
drivers/serial/serial_lh7a40x.c
View file

@ -162,7 +162,7 @@ lh7a40xuart_rx_chars (struct uart_port* port)
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;