From: Alan Cox <alan@lxorguk.ukuu.org.uk>

We leave the BKL around the rts/dtr handler because there is *no* locking
of any kind on this in the driver. It's not "right" with this change but
it's the same wrong as before..

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/char/nozomi.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff -puN drivers/char/nozomi.c~nozomi-prepare-for-bkl-pushdown drivers/char/nozomi.c
--- a/drivers/char/nozomi.c~nozomi-prepare-for-bkl-pushdown
+++ a/drivers/char/nozomi.c
@@ -1716,6 +1716,7 @@ static int ntty_tiocmget(struct tty_stru
 static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
 	unsigned int set, unsigned int clear)
 {
+	lock_kernel();		/* FIXME: Add internal locking */
 	if (set & TIOCM_RTS)
 		set_rts(tty, 1);
 	else if (clear & TIOCM_RTS)
@@ -1725,7 +1726,7 @@ static int ntty_tiocmset(struct tty_stru
 		set_dtr(tty, 1);
 	else if (clear & TIOCM_DTR)
 		set_dtr(tty, 0);
-
+	unlock_kernel();
 	return 0;
 }
 
_