tree: https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/netfs-maple head: 5cb7f190822d09757b30cd9539e57eef72552d1f commit: b1f2f7eee31062dfb5b817b8b98980273c39a6bf [41/42] afs: Use the netfs write helpers config: mips-allmodconfig (https://download.01.org/0day-ci/archive/20220217/202202171144.nlLFprPL-lk...) compiler: mips-linux-gcc (GCC) 11.2.0 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/ammarfaizi2/linux-block/commit/b1f2f7eee31062dfb5b817b... git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/netfs-maple git checkout b1f2f7eee31062dfb5b817b8b98980273c39a6bf # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash 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 >>, old ones prefixed by <<): ERROR: modpost: "mas_walk" [fs/netfs/netfs.ko] undefined! ERROR: modpost: "mas_destroy" [fs/netfs/netfs.ko] undefined! ERROR: modpost: "mas_expected_entries" [fs/netfs/netfs.ko] undefined! ERROR: modpost: "xa_store_range" [fs/netfs/netfs.ko] undefined! ERROR: modpost: "mas_store" [fs/netfs/netfs.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org