[PATCH] Char: tty, delete wake_up_interruptible after tty_wakeup

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: NJiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

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);