2 #include <linux/module.h>
3 #include <linux/kallsyms.h>
4 #include <linux/semaphore.h>
5 #include <linux/sched.h>
7 /* Legacy tty mutex glue */
10 * Getting the big tty mutex.
13 void __lockfunc tty_lock(struct tty_struct *tty)
15 if (WARN(tty->magic != TTY_MAGIC, "L Bad %p\n", tty))
18 mutex_lock(&tty->legacy_mutex);
20 EXPORT_SYMBOL(tty_lock);
22 void __lockfunc tty_unlock(struct tty_struct *tty)
24 if (WARN(tty->magic != TTY_MAGIC, "U Bad %p\n", tty))
26 mutex_unlock(&tty->legacy_mutex);
29 EXPORT_SYMBOL(tty_unlock);
31 void __lockfunc tty_lock_slave(struct tty_struct *tty)
33 if (tty && tty != tty->link)
37 void __lockfunc tty_unlock_slave(struct tty_struct *tty)
39 if (tty && tty != tty->link)
43 void tty_set_lock_subclass(struct tty_struct *tty)
45 lockdep_set_subclass(&tty->legacy_mutex, TTY_LOCK_SLAVE);