use mutex instead of semaphore in isdn subsystem common functions

The ISDN subsystem common functions use a semaphore as mutex. Use the
mutex API instead of the (binary) semaphore.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/isdn.h b/include/linux/isdn.h
index d5dda4b643ac..d0ecc8eebfbf 100644
--- a/include/linux/isdn.h
+++ b/include/linux/isdn.h
@@ -167,6 +167,7 @@ typedef struct {
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
 #include <linux/tcp.h>
+#include <linux/mutex.h>
 
 #define ISDN_TTY_MAJOR    43
 #define ISDN_TTYAUX_MAJOR 44
@@ -616,7 +617,7 @@ typedef struct isdn_devt {
         int               v110emu[ISDN_MAX_CHANNELS]; /* V.110 emulator-mode 0=none */
         atomic_t          v110use[ISDN_MAX_CHANNELS]; /* Usage-Semaphore for stream */
         isdn_v110_stream  *v110[ISDN_MAX_CHANNELS];   /* V.110 private data         */
-        struct semaphore  sem;                        /* serialize list access*/
+        struct mutex      mtx;                        /* serialize list access*/
         unsigned long     global_features;
 } isdn_dev;