240 	uint8_t csum_len = 0;  in mptcp_send_infinite_mapping()  local
252 		csum_len = 2;  in mptcp_send_infinite_mapping()
256 	if ((MAX_TCPOPTLEN - optlen) < (len + csum_len)) {  in mptcp_send_infinite_mapping()
262 	infin_opt.mdss_copt.mdss_len = len + csum_len;  in mptcp_send_infinite_mapping()
293 	if (csum_len != 0) {  in mptcp_send_infinite_mapping()
296 		memcpy(opt + optlen, &csum, csum_len);  in mptcp_send_infinite_mapping()
297 		optlen += csum_len;  in mptcp_send_infinite_mapping()
1215 	int csum_len = 0;  in mptcp_do_dss_opt_meat()  local
1227 		csum_len = 2;  in mptcp_do_dss_opt_meat()
1239 		    sizeof(struct mptcp_dsn_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1240 		if (csum_len == 0) {  in mptcp_do_dss_opt_meat()
1245 			    (dss_rsp1->mdss_copt.mdss_len - csum_len)));  in mptcp_do_dss_opt_meat()
1273 		    sizeof(struct mptcp_dss_ack_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1286 		if (csum_len != 0) {  in mptcp_do_dss_opt_meat()
1287 			csum = *(uint16_t *)(void *)(cp + (dss_ack_rsp->mdss_copt.mdss_len - csum_len));  in mptcp_do_dss_opt_meat()
1306 		    sizeof(struct mptcp_dsn64_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1314 		if (csum_len != 0) {  in mptcp_do_dss_opt_meat()
1315 			csum = *(uint16_t *)(void *)(cp + dsn64->mdss_copt.mdss_len - csum_len);  in mptcp_do_dss_opt_meat()
1348 		    sizeof(struct mptcp_dss64_ack32_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1361 		if (csum_len != 0) {  in mptcp_do_dss_opt_meat()
1362 			csum = *(uint16_t *)(void *)(cp + dss_ack_rsp->mdss_copt.mdss_len - csum_len);  in mptcp_do_dss_opt_meat()
1381 			sizeof(struct mptcp_dss32_ack64_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1392 		if (csum_len == 0) {  in mptcp_do_dss_opt_meat()
1402 			    csum_len));  in mptcp_do_dss_opt_meat()
1414 		    sizeof(struct mptcp_dss64_ack64_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1423 		if (csum_len == 0) {  in mptcp_do_dss_opt_meat()
1433 			    csum_len));  in mptcp_do_dss_opt_meat()