[SERIAL] turn serial semaphores into mutexes

Turn several drivers/serial/ semaphores-used-as-mutex into mutexes

Signed-off-by: Arjan van de Ven <[e-mail]>
Signed-off-by: Russell King <[e-mail]>

drivers/serial/8250.c

···
 #include <linux/serial.h>
 #include <linux/serial_8250.h>
 #include <linux/nmi.h>
+#include <linux/mutex.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
···
  * 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)
 {
···
 	if (port->uartclk == 0)
 		return -EINVAL;
 
-	down(&serial_sem);
+	mutex_lock(&serial_mutex);
 
 	uart = serial8250_find_match_or_unused(port);
 	if (uart) {
···
 		if (ret == 0)
 			ret = uart->port.line;
 	}
-	up(&serial_sem);
+	mutex_unlock(&serial_mutex);
 
 	return ret;
 }
···
 {
 	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;
···
 	} else {
 		uart->port.dev = NULL;
 	}
-	up(&serial_sem);
+	mutex_unlock(&serial_mutex);
 }
 EXPORT_SYMBOL(serial8250_unregister_port);
 

drivers/serial/crisv10.c

···
 #include <linux/init.h>
 #include <asm/uaccess.h>
 #include <linux/kernel.h>
+#include <linux/mutex.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
···
  * 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)
···
 	 * 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,
···
 			count -= c;
 			ret += c;
 		}
-		up(&tmp_buf_sem);
+		mutex_unlock(&tmp_buf_mutex);
 	} else {
 		cli();
 		while (count) {

drivers/serial/pmac_zilog.c

···
 #include <linux/pmu.h>
 #include <linux/bitops.h>
 #include <linux/sysrq.h>
+#include <linux/mutex.h>
 #include <asm/sections.h>
 #include <asm/io.h>
 #include <asm/irq.h>
···
  */
 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,
···
 	if (uap->node == NULL)
 		return -ENODEV;
 
-	down(&pmz_irq_sem);
+	mutex_lock(&pmz_irq_mutex);
 
 	uap->flags |= PMACZILOG_FLAG_IS_OPEN;
 
···
 		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
···
 	if (uap->node == NULL)
 		return;
 
-	down(&pmz_irq_sem);
+	mutex_lock(&pmz_irq_mutex);
 
 	/* Release interrupt handler */
        	free_irq(uap->port.irq, uap);
···
 
 	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;
 	}
 
···
 
 	spin_unlock_irqrestore(&port->lock, flags);
 
-	up(&pmz_irq_sem);
+	mutex_unlock(&pmz_irq_mutex);
 
 	pmz_debug("pmz: shutdown() done.\n");
 }
···
 
 	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);
···
 	pmz_set_scc_power(uap, 0);
 
 	up(&state->sem);
-	up(&pmz_irq_sem);
+	mutex_unlock(&pmz_irq_mutex);
 
 	pmz_debug("suspend, switching complete\n");
 
···
 
 	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);
···
 
  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

drivers/serial/serial_core.c

···
 #include <linux/device.h>
 #include <linux/serial.h> /* for serial_state and serial_icounter_struct */
 #include <linux/delay.h>
+#include <linux/mutex.h>
 
 #include <asm/irq.h>
 #include <asm/uaccess.h>
···
 /*
  * 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)
 
···
 {
 	struct uart_state *state;
 
-	down(&port_sem);
+	mutex_lock(&port_mutex);
 	state = drv->state + line;
 	if (down_interruptible(&state->sem)) {
 		state = ERR_PTR(-ERESTARTSYS);
···
 	}
 
  out:
-	up(&port_sem);
+	mutex_unlock(&port_mutex);
 	return state;
 }
 
···
 
 	state = drv->state + port->line;
 
-	down(&port_sem);
+	mutex_lock(&port_mutex);
 	if (state->port) {
 		ret = -EINVAL;
 		goto out;
···
 		register_console(port->cons);
 
  out:
-	up(&port_sem);
+	mutex_unlock(&port_mutex);
 
 	return ret;
 }
···
 		printk(KERN_ALERT "Removing wrong port: %p != %p\n",
 			state->port, port);
 
-	down(&port_sem);
+	mutex_lock(&port_mutex);
 
 	/*
 	 * Remove the devices from devfs
···
 
 	uart_unconfigure_port(drv, state);
 	state->port = NULL;
-	up(&port_sem);
+	mutex_unlock(&port_mutex);
 
 	return 0;
 }

drivers/serial/serial_txx9.c

···
 #include <linux/tty_flip.h>
 #include <linux/serial_core.h>
 #include <linux/serial.h>
+#include <linux/mutex.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
···
 	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
···
 	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)
···
 		if (ret == 0)
 			ret = uart->port.line;
 	}
-	up(&serial_txx9_sem);
+	mutex_unlock(&serial_txx9_mutex);
 	return ret;
 }
 
···
 {
 	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;
···
 	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);
 }
 
 /*