tree: https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git loopfs_v1 head: e3796aa0ebdf297c4a3273c64aed421530d8a1e3 commit: 47a2c952a6424ccdcbaf543a9c1820134dd06323 [5/8] kernfs: let objects opt-in to propagating from the initial namespace config: c6x-evmc6678_defconfig (attached as .config) compiler: c6x-elf-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 47a2c952a6424ccdcbaf543a9c1820134dd06323 # save the attached .config to linux build tree GCC_VERSION=9.3.0 make.cross ARCH=c6x If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): c6x-elf-ld: warning: section `.far' type changed to PROGBITS c6x-elf-ld: warning: section `.far' type changed to PROGBITS c6x-elf-ld: fs/kernfs/dir.o: in function `kernfs_iop_lookup': c6x-elf-ld: dir.c:(.text+0x538): undefined reference to `init_net' c6x-elf-ld: fs/kernfs/dir.o: in function `kernfs_dir_pos': dir.c:(.text+0xb74): undefined reference to `init_net' c6x-elf-ld: dir.c:(.text+0xb78): undefined reference to `init_net' c6x-elf-ld: fs/kernfs/dir.o: in function `kernfs_fop_readdir': dir.c:(.text+0xe54): undefined reference to `init_net' c6x-elf-ld: fs/kernfs/dir.o:dir.c:(.text+0xe60): more undefined references to `init_net' follow --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org