trace_bits
trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
trace_bits(rs_bits, state, _B_TRUE);
trace_bits(rs_bits, rt->rt_state, _B_FALSE);
trace_bits(rs_bits, RT->rt_state, _B_FALSE);
trace_bits(if_bits, ifp->int_if_flags, _B_FALSE);
trace_bits(is_bits, ifp->int_state, _B_FALSE);
trace_bits(ks_bits, krt->k_state, _B_TRUE);