MTIP_DDF_SEC_LOCK_BIT
set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
!test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)) {
clear_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag);
if (test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag))
clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
(1 << MTIP_DDF_SEC_LOCK_BIT) |