tree: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/snapshot/v5.16 head: 364c1c42b229912132e1615c2ce15be7154e2156 commit: 166780f7cb6bac22a4707a368a2580bc6899e38f [91/137] arm_mpam: Add probe/remove for mpam msc driver and kbuild boiler plate config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20220126/202201261848.Ojsmqjmk-lk...) compiler: aarch64-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://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/commit/?i... git remote add morse https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git git fetch --no-tags morse mpam/snapshot/v5.16 git checkout 166780f7cb6bac22a4707a368a2580bc6899e38f # 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=arm64 SHELL=/bin/bash drivers/platform/mpam/ 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 >>): 230 | int mpam_msc_drv_remove(struct platform_device *pdev) | ^~~~~~~~~~~~~~~~~~~ vim +/mpam_msc_drv_remove +230 drivers/platform/mpam/mpam_devices.c 229 231 { 232 struct mpam_msc *msc = platform_get_drvdata(pdev); 233 234 if (!msc) 235 return 0; 236 237 mutex_lock(&mpam_list_lock); 238 mpam_num_msc--; 239 platform_set_drvdata(pdev, NULL); 240 list_del_rcu(&msc->glbl_list); 241 synchronize_rcu(); 242 mutex_unlock(&mpam_list_lock); 243 244 return 0; 245 } 246 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org