Hi Mark, Thank you for the patch! Yet something to improve: [auto build test ERROR on miklos-vfs/overlayfs-next] [also build test ERROR on ext4/dev linus/master v5.9 next-20201016] [cannot apply to security/next-testing] [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/Mark-Salyzyn/overlayfs-override_... base: https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs-next config: powerpc64-randconfig-r013-20201019 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 094e9f4779eb9b5c6a49014f2f80b8cbb833572f) 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 # install powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://github.com/0day-ci/linux/commit/1e4bdc66a19e446b472fa59b08513954e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mark-Salyzyn/overlayfs-override_creds-off-nested-get-xattr-fix/20201019-195516 git checkout 1e4bdc66a19e446b472fa59b08513954e0b4ea7b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 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 >>): .get = ext4_xattr_hurd_get, ^~~~~~~~~~~~~~~~~~~ 1 error generated. vim +49 fs/ext4/xattr_hurd.c 88ee9d571b6d8ed Jan (janneke Nieuwenhuizen 2020-05-25 45) 88ee9d571b6d8ed Jan (janneke Nieuwenhuizen 2020-05-25 46) const struct xattr_handler ext4_xattr_hurd_handler = { 88ee9d571b6d8ed Jan (janneke Nieuwenhuizen 2020-05-25 47) .prefix = XATTR_HURD_PREFIX, 88ee9d571b6d8ed Jan (janneke Nieuwenhuizen 2020-05-25 48) .list = ext4_xattr_hurd_list, 88ee9d571b6d8ed Jan (janneke Nieuwenhuizen 2020-05-25 @49) .get = ext4_xattr_hurd_get, --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org