tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter head: dd7e47b3480ac6157247778eb11c325fcb1d628b commit: fa94a869e4984f8ce1661283e18f0d543a2d3bd7 [31/59] fscache: read-helper: Use the cache config: mips-nlm_xlr_defconfig (attached as .config) compiler: mips-linux-gcc (GCC) 9.3.0 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 git checkout fa94a869e4984f8ce1661283e18f0d543a2d3bd7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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 <<): WARNING: modpost: missing MODULE_LICENSE() in fs/fscache/fscache.o --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org