DEBUG6
DEBUG6(("original iflag = %o\n", tp->t_modes.c_iflag));
DEBUG6(("driver iflag = %o\n", tp->t_dmodes.c_iflag));
DEBUG6(("apparent iflag = %o\n", tp->t_amodes.c_iflag));
DEBUG6(("effective iflag = %o\n", tp->t_modes.c_iflag));
DEBUG6(D_FAULT, "%s-%d: cleaning up fault bits %x %x %x.%8x\n",
DEBUG6(D_CTLOPS,