From eef15e2a54fad4c2ce3f0a81485dc591ce678f4f Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Tue, 30 Dec 2014 07:11:11 -0500 Subject: [PATCH] tty: Remove warning in tty_lock_slave() Commit 2aff5e2bc62db43e05c814461a08aff0fc2b7fe5 ('tty: Change tty lock order to master->slave') added a warning which is broken and unnecessary now that the tty lock has fixed lock subclasses, added in commit 2febdb632bb96235b94b8fccaf882a78f8f4b2bb ('tty: Preset lock subclass for nested tty locks'). Reported-by: Dan Carpenter Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_mutex.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c index 4486741190c4..a872389dc0bc 100644 --- a/drivers/tty/tty_mutex.c +++ b/drivers/tty/tty_mutex.c @@ -46,12 +46,8 @@ EXPORT_SYMBOL(tty_unlock); void __lockfunc tty_lock_slave(struct tty_struct *tty) { - if (tty && tty != tty->link) { - WARN_ON(!mutex_is_locked(&tty->link->legacy_mutex) || - !tty->driver->type == TTY_DRIVER_TYPE_PTY || - !tty->driver->type == PTY_TYPE_SLAVE); + if (tty && tty != tty->link) tty_lock(tty); - } } void __lockfunc tty_unlock_slave(struct tty_struct *tty)