tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-rewrite-indexing head: 96d4e1af98c26988d3c1b3cf688974c24de90fa9 commit: 367d9c1602163c468de5f472b3273d2ca2f77adc [59/75] afs: Copy local writes to the cache when writing to the server config: m68k-randconfig-r026-20211014 (attached as .config) compiler: m68k-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://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/com... git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git git fetch --no-tags dhowells-fs fscache-rewrite-indexing git checkout 367d9c1602163c468de5f472b3273d2ca2f77adc # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k 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 >>): m68k-linux-ld: fs/afs/write.o: in function `afs_set_page_dirty': write.c:(.text+0xa02): undefined reference to `fscache_set_page_dirty' m68k-linux-ld: fs/afs/write.o: in function `afs_write_back_from_locked_page': write.c:(.text+0x16e2): undefined reference to `__fscache_write_to_cache' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org