RACK_RTT_EMPTY
rack->r_ctl.rack_rs.rs_flags = RACK_RTT_EMPTY;
if (rack->r_ctl.rack_rs.rs_flags != RACK_RTT_EMPTY)
if ((rack->r_ctl.rack_rs.rs_flags & RACK_RTT_EMPTY) ||
if ((rack->r_ctl.rack_rs.rs_flags & RACK_RTT_EMPTY) ||
if ((rack->r_ctl.rack_rs.rs_flags & RACK_RTT_EMPTY) ||
if (rack->r_ctl.rack_rs.rs_flags & RACK_RTT_EMPTY)