Hi Chuck, I love your patch! Yet something to improve: [auto build test ERROR on nfs/linux-next] [also build test ERROR on linus/master v5.14-rc5 next-20210810] [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: openrisc-randconfig-r025-20210811 (attached as .config) compiler: or1k-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/f1aa75010640cf376cac8baca8d42fda7... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Chuck-Lever/SunRPC-fault-injection/20210811-050828 git checkout f1aa75010640cf376cac8baca8d42fda71472772 # 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=openrisc 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 >>): or1k-linux-ld: net/sunrpc/xprt.o: in function `xprt_inject_disconnect': xprt.c:(.text+0x2dd4): undefined reference to `fail_sunrpc' or1k-linux-ld: net/sunrpc/xprt.o: in function `xprt_end_transmit': xprt.c:(.text+0x7b20): undefined reference to `fail_sunrpc' or1k-linux-ld: xprt.c:(.text+0x7b28): undefined reference to `fail_sunrpc' or1k-linux-ld: net/sunrpc/svc.o: in function `svc_process': svc.c:(.text+0x4f64): undefined reference to `fail_sunrpc' or1k-linux-ld: net/sunrpc/svc.o:svc.c:(.text+0x4f80): more undefined references to `fail_sunrpc' follow --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org