TTY_PORT_ACTIVE 623 include/linux/tty.h return test_bit(TTY_PORT_ACTIVE, &port->iflags); TTY_PORT_ACTIVE 629 include/linux/tty.h set_bit(TTY_PORT_ACTIVE, &port->iflags); TTY_PORT_ACTIVE 631 include/linux/tty.h clear_bit(TTY_PORT_ACTIVE, &port->iflags);