Hi Chuck, I love your patch! Yet something to improve: [auto build test ERROR on nfs/linux-next] [also build test ERROR on nfsd/nfsd-next linus/master v5.14-rc5 next-20210809] [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/Chuck-Lever/SunRPC-fault-injecti... base: git://git.linux-nfs.org/projects/trondmy/linux-nfs.git linux-next config: arc-randconfig-r006-20210809 (attached as .config) compiler: arceb-elf-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/f6324480d4b27a24f4df68d663ec3b56a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Chuck-Lever/SunRPC-fault-injection/20210810-021150 git checkout f6324480d4b27a24f4df68d663ec3b56aeca60c0 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash net/sunrpc/ 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 net/sunrpc/debugfs.c:13: net/sunrpc/fail.h:12:20: error: field 'attr' has incomplete type 12 | struct fault_attr attr; | ^~~~ 303 | .attr = FAULT_ATTR_INITIALIZER, | ^~~~~~~~~~~~~~~~~~~~~~ vim +/FAULT_ATTR_INITIALIZER +303 net/sunrpc/debugfs.c 301 302 struct fail_sunrpc_attr fail_sunrpc = { 304 }; 305 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org