#include #include #include #include #include /* Legacy tty mutex glue */ /* * Getting the big tty mutex. */ void __lockfunc tty_lock(struct tty_struct *tty) { if (tty->magic != TTY_MAGIC) { pr_err("L Bad %p\n", tty); WARN_ON(1); return; } tty_kref_get(tty); mutex_lock(&tty->legacy_mutex); } EXPORT_SYMBOL(tty_lock); void __lockfunc tty_unlock(struct tty_struct *tty) { if (tty->magic != TTY_MAGIC) { pr_err("U Bad %p\n", tty); WARN_ON(1); return; } mutex_unlock(&tty->legacy_mutex); tty_kref_put(tty); } EXPORT_SYMBOL(tty_unlock); void __lockfunc tty_lock_slave(struct tty_struct *tty) { if (tty && tty != tty->link) tty_lock(tty); } void __lockfunc tty_unlock_slave(struct tty_struct *tty) { if (tty && tty != tty->link) tty_unlock(tty); } void tty_set_lock_subclass(struct tty_struct *tty) { lockdep_set_subclass(&tty->legacy_mutex, TTY_LOCK_SLAVE); }