itty 212 drivers/tty/n_tty.c WARN_RATELIMIT(tty->port->itty == NULL, itty 434 drivers/tty/pty.c o_tty->port->itty = o_tty; itty 1354 drivers/tty/tty_io.c tty->port->itty = tty; itty 1513 drivers/tty/tty_io.c tty->port->itty = NULL; itty 1515 drivers/tty/tty_io.c tty->link->port->itty = NULL; itty 30 drivers/tty/tty_port.c tty = READ_ONCE(port->itty); itty 258 drivers/tty/tty_port.c if (WARN_ON(port->itty)) itty 233 include/linux/tty.h struct tty_struct *itty; /* internal back ptr */