From: Arjan van de Ven Date: Thu, 12 Jan 2006 18:44:32 +0000 (+0000) Subject: [SERIAL] turn serial semaphores into mutexes X-Git-Tag: v2.6.16-rc1~180^2 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f392ecfa12de9a2baf72789b00557bac040d6171;p=linux-2.6 [SERIAL] turn serial semaphores into mutexes Turn several drivers/serial/ semaphores-used-as-mutex into mutexes Signed-off-by: Arjan van de Ven Signed-off-by: Russell King --- diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 54e5cc0dd5..fb610c3634 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -41,6 +41,7 @@ #include #include #include +#include #include #include @@ -2467,7 +2468,7 @@ static struct platform_device *serial8250_isa_devs; * 16x50 serial ports to be configured at run-time, to support PCMCIA * modems and PCI multiport cards. */ -static DECLARE_MUTEX(serial_sem); +static DEFINE_MUTEX(serial_mutex); static struct uart_8250_port *serial8250_find_match_or_unused(struct uart_port *port) { @@ -2522,7 +2523,7 @@ int serial8250_register_port(struct uart_port *port) if (port->uartclk == 0) return -EINVAL; - down(&serial_sem); + mutex_lock(&serial_mutex); uart = serial8250_find_match_or_unused(port); if (uart) { @@ -2544,7 +2545,7 @@ int serial8250_register_port(struct uart_port *port) if (ret == 0) ret = uart->port.line; } - up(&serial_sem); + mutex_unlock(&serial_mutex); return ret; } @@ -2561,7 +2562,7 @@ void serial8250_unregister_port(int line) { struct uart_8250_port *uart = &serial8250_ports[line]; - down(&serial_sem); + mutex_lock(&serial_mutex); uart_remove_one_port(&serial8250_reg, &uart->port); if (serial8250_isa_devs) { uart->port.flags &= ~UPF_BOOT_AUTOCONF; @@ -2571,7 +2572,7 @@ void serial8250_unregister_port(int line) } else { uart->port.dev = NULL; } - up(&serial_sem); + mutex_unlock(&serial_mutex); } EXPORT_SYMBOL(serial8250_unregister_port); diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c index 08c42c0001..be12623d85 100644 --- a/drivers/serial/crisv10.c +++ b/drivers/serial/crisv10.c @@ -442,6 +442,7 @@ static char *serial_version = "$Revision: 1.25 $"; #include #include #include +#include #include #include @@ -1315,11 +1316,7 @@ static const struct control_pins e100_modem_pins[NR_PORTS] = * memory if large numbers of serial ports are open. */ static unsigned char *tmp_buf; -#ifdef DECLARE_MUTEX -static DECLARE_MUTEX(tmp_buf_sem); -#else -static struct semaphore tmp_buf_sem = MUTEX; -#endif +static DEFINE_MUTEX(tmp_buf_mutex); /* Calculate the chartime depending on baudrate, numbor of bits etc. */ static void update_char_time(struct e100_serial * info) @@ -3661,7 +3658,7 @@ rs_raw_write(struct tty_struct * tty, int from_user, * design. */ if (from_user) { - down(&tmp_buf_sem); + mutex_lock(&tmp_buf_mutex); while (1) { int c1; c = CIRC_SPACE_TO_END(info->xmit.head, @@ -3692,7 +3689,7 @@ rs_raw_write(struct tty_struct * tty, int from_user, count -= c; ret += c; } - up(&tmp_buf_sem); + mutex_unlock(&tmp_buf_mutex); } else { cli(); while (count) { diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c index f330d6c0e0..5f52883e64 100644 --- a/drivers/serial/pmac_zilog.c +++ b/drivers/serial/pmac_zilog.c @@ -60,6 +60,7 @@ #include #include #include +#include #include #include #include @@ -96,7 +97,7 @@ MODULE_LICENSE("GPL"); */ static struct uart_pmac_port pmz_ports[MAX_ZS_PORTS]; static int pmz_ports_count; -static DECLARE_MUTEX(pmz_irq_sem); +static DEFINE_MUTEX(pmz_irq_mutex); static struct uart_driver pmz_uart_reg = { .owner = THIS_MODULE, @@ -922,7 +923,7 @@ static int pmz_startup(struct uart_port *port) if (uap->node == NULL) return -ENODEV; - down(&pmz_irq_sem); + mutex_lock(&pmz_irq_mutex); uap->flags |= PMACZILOG_FLAG_IS_OPEN; @@ -940,11 +941,11 @@ static int pmz_startup(struct uart_port *port) dev_err(&uap->dev->ofdev.dev, "Unable to register zs interrupt handler.\n"); pmz_set_scc_power(uap, 0); - up(&pmz_irq_sem); + mutex_unlock(&pmz_irq_mutex); return -ENXIO; } - up(&pmz_irq_sem); + mutex_unlock(&pmz_irq_mutex); /* Right now, we deal with delay by blocking here, I'll be * smarter later on @@ -981,7 +982,7 @@ static void pmz_shutdown(struct uart_port *port) if (uap->node == NULL) return; - down(&pmz_irq_sem); + mutex_lock(&pmz_irq_mutex); /* Release interrupt handler */ free_irq(uap->port.irq, uap); @@ -1002,7 +1003,7 @@ static void pmz_shutdown(struct uart_port *port) if (ZS_IS_CONS(uap) || ZS_IS_ASLEEP(uap)) { spin_unlock_irqrestore(&port->lock, flags); - up(&pmz_irq_sem); + mutex_unlock(&pmz_irq_mutex); return; } @@ -1019,7 +1020,7 @@ static void pmz_shutdown(struct uart_port *port) spin_unlock_irqrestore(&port->lock, flags); - up(&pmz_irq_sem); + mutex_unlock(&pmz_irq_mutex); pmz_debug("pmz: shutdown() done.\n"); } @@ -1591,7 +1592,7 @@ static int pmz_suspend(struct macio_dev *mdev, pm_message_t pm_state) state = pmz_uart_reg.state + uap->port.line; - down(&pmz_irq_sem); + mutex_lock(&pmz_irq_mutex); down(&state->sem); spin_lock_irqsave(&uap->port.lock, flags); @@ -1624,7 +1625,7 @@ static int pmz_suspend(struct macio_dev *mdev, pm_message_t pm_state) pmz_set_scc_power(uap, 0); up(&state->sem); - up(&pmz_irq_sem); + mutex_unlock(&pmz_irq_mutex); pmz_debug("suspend, switching complete\n"); @@ -1651,7 +1652,7 @@ static int pmz_resume(struct macio_dev *mdev) state = pmz_uart_reg.state + uap->port.line; - down(&pmz_irq_sem); + mutex_lock(&pmz_irq_mutex); down(&state->sem); spin_lock_irqsave(&uap->port.lock, flags); @@ -1685,7 +1686,7 @@ static int pmz_resume(struct macio_dev *mdev) bail: up(&state->sem); - up(&pmz_irq_sem); + mutex_unlock(&pmz_irq_mutex); /* Right now, we deal with delay by blocking here, I'll be * smarter later on diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 9589509fc5..2ca620900b 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -33,6 +33,7 @@ #include #include /* for serial_state and serial_icounter_struct */ #include +#include #include #include @@ -47,7 +48,7 @@ /* * This is used to lock changes in serial line configuration. */ -static DECLARE_MUTEX(port_sem); +static DEFINE_MUTEX(port_mutex); #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) @@ -1472,7 +1473,7 @@ static struct uart_state *uart_get(struct uart_driver *drv, int line) { struct uart_state *state; - down(&port_sem); + mutex_lock(&port_mutex); state = drv->state + line; if (down_interruptible(&state->sem)) { state = ERR_PTR(-ERESTARTSYS); @@ -1509,7 +1510,7 @@ static struct uart_state *uart_get(struct uart_driver *drv, int line) } out: - up(&port_sem); + mutex_unlock(&port_mutex); return state; } @@ -2219,7 +2220,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *port) state = drv->state + port->line; - down(&port_sem); + mutex_lock(&port_mutex); if (state->port) { ret = -EINVAL; goto out; @@ -2255,7 +2256,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *port) register_console(port->cons); out: - up(&port_sem); + mutex_unlock(&port_mutex); return ret; } @@ -2279,7 +2280,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *port) printk(KERN_ALERT "Removing wrong port: %p != %p\n", state->port, port); - down(&port_sem); + mutex_lock(&port_mutex); /* * Remove the devices from devfs @@ -2288,7 +2289,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *port) uart_unconfigure_port(drv, state); state->port = NULL; - up(&port_sem); + mutex_unlock(&port_mutex); return 0; } diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c index fdd1f1915a..ee98a867bc 100644 --- a/drivers/serial/serial_txx9.c +++ b/drivers/serial/serial_txx9.c @@ -52,6 +52,7 @@ #include #include #include +#include #include #include @@ -1018,7 +1019,7 @@ static void serial_txx9_resume_port(int line) uart_resume_port(&serial_txx9_reg, &serial_txx9_ports[line].port); } -static DECLARE_MUTEX(serial_txx9_sem); +static DEFINE_MUTEX(serial_txx9_mutex); /** * serial_txx9_register_port - register a serial port @@ -1037,7 +1038,7 @@ static int __devinit serial_txx9_register_port(struct uart_port *port) struct uart_txx9_port *uart; int ret = -ENOSPC; - down(&serial_txx9_sem); + mutex_lock(&serial_txx9_mutex); for (i = 0; i < UART_NR; i++) { uart = &serial_txx9_ports[i]; if (uart->port.type == PORT_UNKNOWN) @@ -1058,7 +1059,7 @@ static int __devinit serial_txx9_register_port(struct uart_port *port) if (ret == 0) ret = uart->port.line; } - up(&serial_txx9_sem); + mutex_unlock(&serial_txx9_mutex); return ret; } @@ -1073,7 +1074,7 @@ static void __devexit serial_txx9_unregister_port(int line) { struct uart_txx9_port *uart = &serial_txx9_ports[line]; - down(&serial_txx9_sem); + mutex_lock(&serial_txx9_mutex); uart_remove_one_port(&serial_txx9_reg, &uart->port); uart->port.flags = 0; uart->port.type = PORT_UNKNOWN; @@ -1082,7 +1083,7 @@ static void __devexit serial_txx9_unregister_port(int line) uart->port.membase = 0; uart->port.dev = NULL; uart_add_one_port(&serial_txx9_reg, &uart->port); - up(&serial_txx9_sem); + mutex_unlock(&serial_txx9_mutex); } /*