diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/sb1250-duart.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/serial/sb1250-duart.c b/drivers/serial/sb1250-duart.c index 1d9d7285172..20125375501 100644 --- a/drivers/serial/sb1250-duart.c +++ b/drivers/serial/sb1250-duart.c @@ -25,6 +25,7 @@ #define SUPPORT_SYSRQ #endif +#include <linux/compiler.h> #include <linux/console.h> #include <linux/delay.h> #include <linux/errno.h> @@ -103,8 +104,6 @@ struct sbd_duart { static struct sbd_duart sbd_duarts[DUART_MAX_CHIP]; -#define __unused __attribute__((__unused__)) - /* * Reading and writing SB1250 DUART registers. @@ -204,12 +203,12 @@ static int sbd_receive_drain(struct sbd_port *sport) return loops; } -static int __unused sbd_transmit_ready(struct sbd_port *sport) +static int __maybe_unused sbd_transmit_ready(struct sbd_port *sport) { return read_sbdchn(sport, R_DUART_STATUS) & M_DUART_TX_RDY; } -static int __unused sbd_transmit_drain(struct sbd_port *sport) +static int __maybe_unused sbd_transmit_drain(struct sbd_port *sport) { int loops = 10000; @@ -664,7 +663,7 @@ static void sbd_release_port(struct uart_port *uport) static int sbd_map_port(struct uart_port *uport) { - static const char *err = KERN_ERR "sbd: Cannot map MMIO\n"; + const char *err = KERN_ERR "sbd: Cannot map MMIO\n"; struct sbd_port *sport = to_sport(uport); struct sbd_duart *duart = sport->duart; @@ -691,8 +690,7 @@ static int sbd_map_port(struct uart_port *uport) static int sbd_request_port(struct uart_port *uport) { - static const char *err = KERN_ERR - "sbd: Unable to reserve MMIO resource\n"; + const char *err = KERN_ERR "sbd: Unable to reserve MMIO resource\n"; struct sbd_duart *duart = to_sport(uport)->duart; int map_guard; int ret = 0; @@ -755,7 +753,7 @@ static int sbd_verify_port(struct uart_port *uport, struct serial_struct *ser) } -static struct uart_ops sbd_ops = { +static const struct uart_ops sbd_ops = { .tx_empty = sbd_tx_empty, .set_mctrl = sbd_set_mctrl, .get_mctrl = sbd_get_mctrl, |