tree: https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/netfs-lib head: 893ce0d06d6627c743bf20d48234543ff9262d19 commit: 7deb1d07f1b835b302c1a747312e02d2e1089578 [24/29] netfs: Provide invalidatepage and releasepage calls config: nios2-randconfig-r006-20220119 (https://download.01.org/0day-ci/archive/20220120/202201200630.EgURYeDW-lk...) compiler: nios2-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/7deb1d07f1b835b302c1a74... git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/netfs-lib git checkout 7deb1d07f1b835b302c1a747312e02d2e1089578 # 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=nios2 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 >>): nios2-linux-ld: fs/cifs/file.o:(.rodata+0x4954): undefined reference to `netfs_invalidatepage' nios2-linux-ld: fs/cifs/file.o:(.rodata+0x4958): undefined reference to `netfs_releasepage' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org