Hi "Matthew, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.14-rc1 next-20210715] [cannot apply to hnaz-linux-mm/master xfs-linux/for-next tip/perf/core] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Matthew-Wilcox-Oracle/Memory-fol... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 8096acd7442e613fad0354fc8dfdb2003cceea0b config: nios2-defconfig (attached as .config) compiler: nios2-linux-gcc (GCC) 10.3.0 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 # https://github.com/0day-ci/linux/commit/8e4044529261dffc386ab56b6d90e8511... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Matthew-Wilcox-Oracle/Memory-folios/20210715-133101 git checkout 8e4044529261dffc386ab56b6d90e8511c820605 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=nios2 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 >>): In file included from include/linux/fscache.h:22, from fs/nfs/fscache.h:14, from fs/nfs/client.c:48: include/linux/netfs.h: In function 'folio_start_fscache': 43 | folio_set_private_2_flag(folio); | ^~~~~~~~~~~~~~~~~~~~~~~~ | folio_set_private_2 cc1: some warnings being treated as errors vim +43 include/linux/netfs.h 31 32 /** 33 * folio_start_fscache - Start an fscache write on a folio. 34 * @folio: The folio. 35 * 36 * Call this function before writing a folio to a local cache. Starting a 37 * second write before the first one finishes is not allowed. 38 */ 39 static inline void folio_start_fscache(struct folio *folio) 40 { 41 VM_BUG_ON_FOLIO(folio_test_private_2(folio), folio); 42 folio_get(folio); 44 } 45 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org