tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cba5e97280f53ec7feb656fcdf0ec00a5c6dd539 commit: 87f77a6797971579a1da497ac01b692bafbc6cca net/mlx5e: fix mlx5e_tc_tun_update_header_ipv6 dummy definition date: 3 months ago config: arm-randconfig-r005-20210620 (attached as .config) compiler: arm-linux-gnueabi-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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 87f77a6797971579a1da497ac01b692bafbc6cca # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arm-linux-gnueabi-ld: arch/arm/mach-dove/pcie.o: in function `dove_pcie_setup': arm-linux-gnueabi-ld: fs/btrfs/super.o: in function `btrfs_statfs': super.c:(.text+0xa96): undefined reference to `__aeabi_uldivmod' arm-linux-gnueabi-ld: super.c:(.text+0xac2): undefined reference to `__aeabi_uldivmod' arm-linux-gnueabi-ld: super.c:(.text+0xafe): undefined reference to `__aeabi_uldivmod' arm-linux-gnueabi-ld: super.c:(.text+0xb8e): undefined reference to `__aeabi_uldivmod' arm-linux-gnueabi-ld: super.c:(.text+0xba2): undefined reference to `__aeabi_uldivmod' arm-linux-gnueabi-ld: fs/btrfs/super.o:super.c:(.text+0xbba): more undefined references to `__aeabi_uldivmod' follow --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org