Hi Tony, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Tony-Lu/net-smc-Spread-workload-... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 8aaaf2f3af2ae212428f4db1af34214225f5cec3 config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20220114/202201141728.f7G5VC95-lk...) compiler: powerpc-linux-gcc (GCC) 11.2.0 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/5c1f27f3fde941bdde57fcae8606932f2... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Tony-Lu/net-smc-Spread-workload-over-multiple-cores/20220114-134957 git checkout 5c1f27f3fde941bdde57fcae8606932f245b6759 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash net/smc/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 73 | int __init smc_sysctl_init(void) | ^~~~~~~~~~~~~~~ 78 | void smc_sysctl_exit(void) | ^~~~~~~~~~~~~~~ vim +/smc_sysctl_init +73 net/smc/smc_sysctl.c 72 74 { 75 return register_pernet_subsys(&smc_sysctl_ops); 76 } 77 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org