tree: https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/netfs-maple head: 429e2bb6fb190f390ed23afc0d2308e877c43be5 commit: fc3202013b39db4b5188e871431e6650d819129d [13/35] netfs: Provide invalidatepage and releasepage calls config: x86_64-kexec (https://download.01.org/0day-ci/archive/20220211/202202111320.3RVjwLgi-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/ammarfaizi2/linux-block/commit/fc3202013b39db4b5188e87... git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/netfs-maple git checkout fc3202013b39db4b5188e871431e6650d819129d # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 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 >>): ld: fs/cifs/file.o:(.rodata+0x348): undefined reference to `netfs_invalidatepage' ld: fs/cifs/file.o:(.rodata+0x350): undefined reference to `netfs_releasepage' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org