stable-rc 4.14 for architectures arm64, arm, x86_64 and i386 builds failed due to below error, net/ipv6/addrconf.c: In function 'addrconf_init': net/ipv6/addrconf.c:6593:22: error: 'blackhole_netdev' undeclared (first use in this function); did you mean 'alloc_netdev'? bdev = ipv6_add_dev(blackhole_netdev); ^~~~~~~~~~~~~~~~ alloc_netdev net/ipv6/addrconf.c:6593:22: note: each undeclared identifier is reported only once for each function it appears in net/ipv6/addrconf.c: In function 'addrconf_cleanup': net/ipv6/addrconf.c:6667:18: error: 'blackhole_netdev' undeclared (first use in this function); did you mean 'alloc_netdev'? addrconf_ifdown(blackhole_netdev, 2); ^~~~~~~~~~~~~~~~ alloc_netdev Build link, https://ci.linaro.org/view/lkft/job/openembedded-lkft-linux-stable-rc-4.14/DISTRO=lkft,MACHINE=intel-corei7-64,label=docker-lkft/632/consoleText - Naresh