15 void tty_lock(struct tty_struct *tty)  in tty_lock()  argument
17 	tty_kref_get(tty);  in tty_lock()
18 	mutex_lock(&tty->legacy_mutex);  in tty_lock()
22 int tty_lock_interruptible(struct tty_struct *tty)  in tty_lock_interruptible()  argument
26 	tty_kref_get(tty);  in tty_lock_interruptible()
27 	ret = mutex_lock_interruptible(&tty->legacy_mutex);  in tty_lock_interruptible()
29 		tty_kref_put(tty);  in tty_lock_interruptible()
33 void tty_unlock(struct tty_struct *tty)  in tty_unlock()  argument
35 	mutex_unlock(&tty->legacy_mutex);  in tty_unlock()
36 	tty_kref_put(tty);  in tty_unlock()
40 void tty_lock_slave(struct tty_struct *tty)  in tty_lock_slave()  argument
42 	if (tty && tty != tty->link)  in tty_lock_slave()
43 		tty_lock(tty);  in tty_lock_slave()
46 void tty_unlock_slave(struct tty_struct *tty)  in tty_unlock_slave()  argument
48 	if (tty && tty != tty->link)  in tty_unlock_slave()
49 		tty_unlock(tty);  in tty_unlock_slave()
52 void tty_set_lock_subclass(struct tty_struct *tty)  in tty_set_lock_subclass()  argument
54 	lockdep_set_subclass(&tty->legacy_mutex, TTY_LOCK_SLAVE);  in tty_set_lock_subclass()