XPC_P_ENGAGED_UV
part_uv->flags &= ~XPC_P_ENGAGED_UV;
return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0;
if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0)
part_uv->flags |= XPC_P_ENGAGED_UV;
part_uv->flags &= ~XPC_P_ENGAGED_UV;