extern int ircomm_tty_tiocmget(struct tty_struct *tty, struct file *file);
extern int ircomm_tty_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
extern int ircomm_tty_tiocmget(struct tty_struct *tty, struct file *file);
extern int ircomm_tty_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);