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tty: Remove warning in tty_lock_slave()

Browse Source 
Commit 2aff5e2bc6 ('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 2febdb632b
('tty: Preset lock subclass for nested tty locks').

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2014-12-30 07:11:11 -05:00 committed by Greg Kroah-Hartman
parent 2e4081367b
commit eef15e2a54
1 changed files with 1 additions and 5 deletions
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6
drivers/tty/tty_mutex.c
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@ -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)