XC               1871 net/packet/af_packet.c 		pg_vec = XC(po->pg_vec, pg_vec);
XC               1877 net/packet/af_packet.c 		order = XC(po->pg_vec_order, order);
XC               1878 net/packet/af_packet.c 		req->tp_block_nr = XC(po->pg_vec_len, req->tp_block_nr);