I couldn't find any users, so removing it..

Signed-off-by: Daniel Walker <dwalker@mvista.com>

---
 drivers/isdn/i4l/isdn_tty.c |    1 -
 include/linux/isdn.h        |    1 -
 2 files changed, 2 deletions(-)

Index: linux-2.6.23/drivers/isdn/i4l/isdn_tty.c
===================================================================
--- linux-2.6.23.orig/drivers/isdn/i4l/isdn_tty.c
+++ linux-2.6.23/drivers/isdn/i4l/isdn_tty.c
@@ -1915,7 +1915,6 @@ isdn_tty_modem_init(void)
 		info->owner = THIS_MODULE;
 #endif
 		spin_lock_init(&info->readlock);
-		init_MUTEX(&info->write_sem);
 		sprintf(info->last_cause, "0000");
 		sprintf(info->last_num, "none");
 		info->last_dir = 0;
Index: linux-2.6.23/include/linux/isdn.h
===================================================================
--- linux-2.6.23.orig/include/linux/isdn.h
+++ linux-2.6.23/include/linux/isdn.h
@@ -507,7 +507,6 @@ typedef struct modem_info {
   struct ktermios	normal_termios;  /* For saving termios structs     */
   struct ktermios	callout_termios;
   wait_queue_head_t	open_wait, close_wait;
-  struct semaphore      write_sem;
   spinlock_t	        readlock;
 } modem_info;
 

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