14 void tty_lock(struct tty_struct *tty)  in tty_lock()  argument
16 	if (WARN(tty->magic != TTY_MAGIC, "L Bad %p\n", tty))  in tty_lock()
18 	tty_kref_get(tty);  in tty_lock()
19 	mutex_lock(&tty->legacy_mutex);  in tty_lock()
23 int tty_lock_interruptible(struct tty_struct *tty)  in tty_lock_interruptible()  argument
27 	if (WARN(tty->magic != TTY_MAGIC, "L Bad %p\n", tty))  in tty_lock_interruptible()
29 	tty_kref_get(tty);  in tty_lock_interruptible()
30 	ret = mutex_lock_interruptible(&tty->legacy_mutex);  in tty_lock_interruptible()
32 		tty_kref_put(tty);  in tty_lock_interruptible()
36 void tty_unlock(struct tty_struct *tty)  in tty_unlock()  argument
38 	if (WARN(tty->magic != TTY_MAGIC, "U Bad %p\n", tty))  in tty_unlock()
40 	mutex_unlock(&tty->legacy_mutex);  in tty_unlock()
41 	tty_kref_put(tty);  in tty_unlock()
45 void tty_lock_slave(struct tty_struct *tty)  in tty_lock_slave()  argument
47 	if (tty && tty != tty->link)  in tty_lock_slave()
48 		tty_lock(tty);  in tty_lock_slave()
51 void tty_unlock_slave(struct tty_struct *tty)  in tty_unlock_slave()  argument
53 	if (tty && tty != tty->link)  in tty_unlock_slave()
54 		tty_unlock(tty);  in tty_unlock_slave()
57 void tty_set_lock_subclass(struct tty_struct *tty)  in tty_set_lock_subclass()  argument
59 	lockdep_set_subclass(&tty->legacy_mutex, TTY_LOCK_SLAVE);  in tty_set_lock_subclass()