[SERIAL] turn serial semaphores into mutexes

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

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c
index fdd1f1915a42..ee98a867bc6d 100644
--- a/drivers/serial/serial_txx9.c
+++ b/drivers/serial/serial_txx9.c
@@ -52,6 +52,7 @@
 #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>
@@ -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);
 }
 
 /*