From: Jiri Slaby <jirislaby@gmail.com>

tty_wakeup calls wake_up_interruptible(&tty->write_wait) itself, it's not
needed to wake up again after tty_wakeup returns.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/char/tty_io.c |    1 -
 1 files changed, 1 deletion(-)

diff -puN drivers/char/tty_io.c~char-tty-delete-wake_up_interruptible-after-tty_wakeup drivers/char/tty_io.c
--- a/drivers/char/tty_io.c~char-tty-delete-wake_up_interruptible-after-tty_wakeup
+++ a/drivers/char/tty_io.c
@@ -1612,7 +1612,6 @@ void start_tty(struct tty_struct *tty)
 
 	/* If we have a running line discipline it may need kicking */
 	tty_wakeup(tty);
-	wake_up_interruptible(&tty->write_wait);
 }
 
 EXPORT_SYMBOL(start_tty);
_