Hi Dmytro, Thank you for the patch! Yet something to improve: [auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Dmytro-Shytyi/Re-PATCH-net-next-... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 8be33ecfc1ffd2da20cc29e957e4cb6eb99310cb config: sh-allmodconfig (attached as .config) compiler: sh4-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/0d851d20831574b490bbb131cb68f722d... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Dmytro-Shytyi/Re-PATCH-net-next-net-Variable-SLAAC-SLAAC-with-prefixes-of-arbitrary-length-in-PIO/20201111-014800 git checkout 0d851d20831574b490bbb131cb68f722dc2419ca # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): net/ipv6/addrconf.c: In function 'ipv6_create_tempaddr': 1329 | __int128 host_id; | ^~~~~~~~ net/ipv6/addrconf.c:1330:2: error: expected expression before '__int128' 1330 | __int128 net_prfx; | ^~~~~~~~ net/ipv6/addrconf.c:1331:2: error: expected expression before '__int128' 1331 | __int128 ipv6addr; | ^~~~~~~~ net/ipv6/addrconf.c:1332:2: error: expected expression before '__int128' 1332 | __int128 mask_128; | ^~~~~~~~ net/ipv6/addrconf.c:1333:2: error: expected expression before '__int128' 1333 | __int128 mask_host_id; | ^~~~~~~~ net/ipv6/addrconf.c:1334:2: error: expected expression before '__int128' 1334 | __int128 mask_net_prfx; | ^~~~~~~~ 1335 | int i; | ^~~ 1338 | memset(&mask_128, 0xFF, 16); | ^~~~~~~~ net/ipv6/addrconf.c:1338:10: note: each undeclared identifier is reported only once for each function it appears in 1370 | memcpy(&host_id, temp.s6_addr32, sizeof(host_id)); | ^~~~~~~ 1371 | memcpy(&net_prfx, addr.s6_addr, sizeof(net_prfx)); | ^~~~~~~~ 1373 | mask_host_id = ifp->prefix_len != 128 ? (mask_128 << ifp->prefix_len) : 0x0; | ^~~~~~~~~~~~ | mask_host_id_arr 1380 | mask_net_prfx = mask_128 ^ mask_host_id; | ^~~~~~~~~~~~~ 1383 | ipv6addr = net_prfx | host_id; | ^~~~~~~~ | ipv6_hdr net/ipv6/addrconf.c: In function 'addrconf_prefix_rcv_add_addr': net/ipv6/addrconf.c:2626:3: error: expected expression before '__int128' 2626 | __int128 mask_128; | ^~~~~~~~ net/ipv6/addrconf.c:2627:3: error: expected expression before '__int128' 2627 | __int128 mask_net_prfx; | ^~~~~~~~ net/ipv6/addrconf.c:2628:3: error: expected expression before '__int128' 2628 | __int128 net_prfx; | ^~~~~~~~ net/ipv6/addrconf.c:2629:3: error: expected expression before '__int128' 2629 | __int128 curr_net_prfx; | ^~~~~~~~ net/ipv6/addrconf.c:2630:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] 2630 | int hostid_len; | ^~~ net/ipv6/addrconf.c:2634:11: error: 'mask_128' undeclared (first use in this function) 2634 | memset(&mask_128, 0xFF, 16); | ^~~~~~~~ net/ipv6/addrconf.c:2642:4: error: 'mask_net_prfx' undeclared (first use in this function) 2642 | mask_net_prfx = pinfo->prefix_len != 128 ? (mask_128 << pinfo->prefix_len) : 0x0; | ^~~~~~~~~~~~~ net/ipv6/addrconf.c:2650:12: error: 'net_prfx' undeclared (first use in this function) 2650 | memcpy(&net_prfx, pinfo->prefix.s6_addr32, 16); | ^~~~~~~~ 2654 | memcpy(&curr_net_prfx, ifp->addr.s6_addr32, 16); | ^~~~~~~~~~~~~ 2630 | int hostid_len; | ^~~~~~~~~~ net/ipv6/addrconf.c: In function 'ipv6_generate_address_variable_plen': net/ipv6/addrconf.c:3424:2: error: expected expression before '__int128' 3424 | __int128 host_id; | ^~~~~~~~ net/ipv6/addrconf.c:3425:2: error: expected expression before '__int128' 3425 | __int128 net_prfx; | ^~~~~~~~ net/ipv6/addrconf.c:3426:2: error: expected expression before '__int128' 3426 | __int128 ipv6addr; | ^~~~~~~~ net/ipv6/addrconf.c:3427:2: error: expected expression before '__int128' 3427 | __int128 mask_128; | ^~~~~~~~ net/ipv6/addrconf.c:3428:2: error: expected expression before '__int128' 3428 | __int128 mask_host_id; | ^~~~~~~~ net/ipv6/addrconf.c:3429:2: error: expected expression before '__int128' 3429 | __int128 mask_net_prfx; | ^~~~~~~~ net/ipv6/addrconf.c:3430:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] 3430 | int i; | ^~~ net/ipv6/addrconf.c:3433:10: error: 'mask_128' undeclared (first use in this function) 3433 | memset(&mask_128, 0xFF, 16); | ^~~~~~~~ net/ipv6/addrconf.c:3477:10: error: 'host_id' undeclared (first use in this function) 3477 | memcpy(&host_id, temp.s6_addr32, 16); | ^~~~~~~ net/ipv6/addrconf.c:3478:10: error: 'net_prfx' undeclared (first use in this function) 3478 | memcpy(&net_prfx, address->s6_addr32, 16); | ^~~~~~~~ net/ipv6/addrconf.c:3480:2: error: 'mask_host_id' undeclared (first use in this function); did you mean 'mask_host_id_arr'? 3480 | mask_host_id = rcvd_prfx_len != 128 ? (mask_128 << rcvd_prfx_len) : 0x0; | ^~~~~~~~~~~~ | mask_host_id_arr net/ipv6/addrconf.c:3487:2: error: 'mask_net_prfx' undeclared (first use in this function) 3487 | mask_net_prfx = mask_128 ^ mask_host_id; | ^~~~~~~~~~~~~ net/ipv6/addrconf.c:3490:2: error: 'ipv6addr' undeclared (first use in this function); did you mean 'ipv6_hdr'? 3490 | ipv6addr = net_prfx | host_id; | ^~~~~~~~ | ipv6_hdr vim +/__int128 +1329 net/ipv6/addrconf.c 1313 1314 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, bool block) 1315 { 1316 struct inet6_dev *idev = ifp->idev; 1317 unsigned long tmp_tstamp, age; 1318 unsigned long regen_advance; 1319 unsigned long now = jiffies; 1320 s32 cnf_temp_preferred_lft; 1321 struct inet6_ifaddr *ift; 1322 struct ifa6_config cfg; 1323 long max_desync_factor; 1324 1325 struct in6_addr temp, addr; 1326 1327 int ret = 0; 1328 1330 __int128 net_prfx; 1331 __int128 ipv6addr; 1332 __int128 mask_128; 1333 __int128 mask_host_id; 1334 __int128 mask_net_prfx; 1336 unsigned char mask_host_id_arr[128]; 1337 1339 write_lock_bh(&idev->lock); 1340 1341 retry: 1342 in6_dev_hold(idev); 1343 if (idev->cnf.use_tempaddr <= 0) { 1344 write_unlock_bh(&idev->lock); 1345 pr_info("%s: use_tempaddr is disabled\n", __func__); 1346 in6_dev_put(idev); 1347 ret = -1; 1348 goto out; 1349 } 1350 spin_lock_bh(&ifp->lock); 1351 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) { 1352 idev->cnf.use_tempaddr = -1; /*XXX*/ 1353 spin_unlock_bh(&ifp->lock); 1354 write_unlock_bh(&idev->lock); 1355 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n", 1356 __func__); 1357 in6_dev_put(idev); 1358 ret = -1; 1359 goto out; 1360 } 1361 in6_ifa_hold(ifp); 1362 1363 if (ifp->prefix_len == 64) { 1364 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8); 1365 ipv6_gen_rnd_iid(&addr); 1366 } else if (ifp->prefix_len > 0 && ifp->prefix_len <= 128) { 1367 memcpy(addr.s6_addr, ifp->addr.s6_addr, 16); 1368 get_random_bytes(temp.s6_addr32, 16); 1369 1372 1374 memcpy(mask_host_id_arr, &mask_host_id, 16); 1375 for (i = 0; i < 128; i++) 1376 mask_host_id_arr[i] = reverse_bits(mask_host_id_arr[i]); 1377 memcpy(&mask_host_id, mask_host_id_arr, 16); 1378 host_id = host_id & mask_host_id; 1379 1381 net_prfx = net_prfx & mask_net_prfx; 1382 1384 memcpy(addr.s6_addr, &ipv6addr, 16); 1385 } 1386 age = (now - ifp->tstamp) / HZ; 1387 1388 regen_advance = idev->cnf.regen_max_retry * 1389 idev->cnf.dad_transmits * 1390 max(NEIGH_VAR(idev->nd_parms, RETRANS_TIME), HZ/100) / HZ; 1391 1392 /* recalculate max_desync_factor each time and update 1393 * idev->desync_factor if it's larger 1394 */ 1395 cnf_temp_preferred_lft = READ_ONCE(idev->cnf.temp_prefered_lft); 1396 max_desync_factor = min_t(__u32, 1397 idev->cnf.max_desync_factor, 1398 cnf_temp_preferred_lft - regen_advance); 1399 1400 if (unlikely(idev->desync_factor > max_desync_factor)) { 1401 if (max_desync_factor > 0) { 1402 get_random_bytes(&idev->desync_factor, 1403 sizeof(idev->desync_factor)); 1404 idev->desync_factor %= max_desync_factor; 1405 } else { 1406 idev->desync_factor = 0; 1407 } 1408 } 1409 1410 memset(&cfg, 0, sizeof(cfg)); 1411 cfg.valid_lft = min_t(__u32, ifp->valid_lft, 1412 idev->cnf.temp_valid_lft + age); 1413 cfg.preferred_lft = cnf_temp_preferred_lft + age - idev->desync_factor; 1414 cfg.preferred_lft = min_t(__u32, ifp->prefered_lft, cfg.preferred_lft); 1415 1416 cfg.plen = ifp->prefix_len; 1417 tmp_tstamp = ifp->tstamp; 1418 spin_unlock_bh(&ifp->lock); 1419 1420 write_unlock_bh(&idev->lock); 1421 1422 /* A temporary address is created only if this calculated Preferred 1423 * Lifetime is greater than REGEN_ADVANCE time units. In particular, 1424 * an implementation must not create a temporary address with a zero 1425 * Preferred Lifetime. 1426 * Use age calculation as in addrconf_verify to avoid unnecessary 1427 * temporary addresses being generated. 1428 */ 1429 age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; 1430 if (cfg.preferred_lft <= regen_advance + age) { 1431 in6_ifa_put(ifp); 1432 in6_dev_put(idev); 1433 ret = -1; 1434 goto out; 1435 } 1436 1437 cfg.ifa_flags = IFA_F_TEMPORARY; 1438 /* set in addrconf_prefix_rcv() */ 1439 if (ifp->flags & IFA_F_OPTIMISTIC) 1440 cfg.ifa_flags |= IFA_F_OPTIMISTIC; 1441 1442 cfg.pfx = &addr; 1443 cfg.scope = ipv6_addr_scope(cfg.pfx); 1444 1445 ift = ipv6_add_addr(idev, &cfg, block, NULL); 1446 if (IS_ERR(ift)) { 1447 in6_ifa_put(ifp); 1448 in6_dev_put(idev); 1449 pr_info("%s: retry temporary address regeneration\n", __func__); 1450 write_lock_bh(&idev->lock); 1451 goto retry; 1452 } 1453 1454 spin_lock_bh(&ift->lock); 1455 ift->ifpub = ifp; 1456 ift->cstamp = now; 1457 ift->tstamp = tmp_tstamp; 1458 spin_unlock_bh(&ift->lock); 1459 1460 addrconf_dad_start(ift); 1461 in6_ifa_put(ift); 1462 in6_dev_put(idev); 1463 out: 1464 return ret; 1465 } 1466 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org