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 (tty->magic != TTY_MAGIC) {
16 pr_err("L Bad %p\n", tty);
21 mutex_lock(&tty->legacy_mutex);
23 EXPORT_SYMBOL(tty_lock);
25 void __lockfunc tty_unlock(struct tty_struct *tty)
27 if (tty->magic != TTY_MAGIC) {
28 pr_err("U Bad %p\n", tty);
32 mutex_unlock(&tty->legacy_mutex);
35 EXPORT_SYMBOL(tty_unlock);
37 void __lockfunc tty_lock_slave(struct tty_struct *tty)
39 if (tty && tty != tty->link)
43 void __lockfunc tty_unlock_slave(struct tty_struct *tty)
45 if (tty && tty != tty->link)
49 void tty_set_lock_subclass(struct tty_struct *tty)
51 lockdep_set_subclass(&tty->legacy_mutex, TTY_LOCK_SLAVE);