drivers/char/tty_io.c: remove pty_sem

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

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Acked-by: Alan Cox <alan@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 0 insertions, 2 deletions

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index c927f42c8e4..b62bb67c341 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -3721,7 +3721,6 @@ static void initialize_tty_struct(struct tty_struct *tty)
         tty->buf.head = tty->buf.tail = NULL;
         tty_buffer_init(tty);
         INIT_DELAYED_WORK(&tty->buf.work, flush_to_ldisc);
-        init_MUTEX(&tty->buf.pty_sem);
         mutex_init(&tty->termios_mutex);
         init_waitqueue_head(&tty->write_wait);
         init_waitqueue_head(&tty->read_wait);
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 402de892b3e..5824a9777ad 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -74,7 +74,6 @@ struct tty_buffer {
 
 struct tty_bufhead {
         struct delayed_work work;
-        struct semaphore pty_sem;
         spinlock_t lock;
         struct tty_buffer *head;        /* Queue head */
         struct tty_buffer *tail;        /* Active buffer */