[PATCH] USB serial: Converts port semaphore to mutexes.

The usbserial's port semaphore used to synchronize serial_open()
and serial_close() are strict mutexes, convert them to the mutex
implementation.

Signed-off-by: Luiz Capitulino <lcapitulino@mandriva.com.br>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/usb/serial/usb-serial.h b/drivers/usb/serial/usb-serial.h
index d7d27c3385b3..dc89d8710460 100644
--- a/drivers/usb/serial/usb-serial.h
+++ b/drivers/usb/serial/usb-serial.h
@@ -16,7 +16,7 @@
 
 #include <linux/config.h>
 #include <linux/kref.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 
 #define SERIAL_TTY_MAJOR        188     /* Nice legal number now */
 #define SERIAL_TTY_MINORS       255     /* loads of devices :) */
@@ -31,7 +31,7 @@
  * @serial: pointer back to the struct usb_serial owner of this port.
  * @tty: pointer to the corresponding tty for this port.
  * @lock: spinlock to grab when updating portions of this structure.
- * @sem: semaphore used to synchronize serial_open() and serial_close()
+ * @mutex: mutex used to synchronize serial_open() and serial_close()
  *      access for this port.
  * @number: the number of the port (the minor number).
  * @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
@@ -63,7 +63,7 @@ struct usb_serial_port {
         struct usb_serial *     serial;
         struct tty_struct *     tty;
         spinlock_t              lock;
-        struct semaphore        sem;
+        struct mutex            mutex;
         unsigned char           number;
 
         unsigned char *         interrupt_in_buffer;