Hi Tuan, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.9-rc4 next-20200910] [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/Tuan-Phan/perf-arm_dsu-Support-D... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git ab29a807a7ddaa7c84d2f4cb8d29e74e33759072 config: arm64-randconfig-r012-20200909 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0a5dc7effb191eff740e0e7ae7bd8e1f6bdb3ad9) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 >>): static const struct acpi_device_id dsu_pmu_acpi_match[] = { ^ 1 warning generated. # https://github.com/0day-ci/linux/commit/40c3a0c70d4472e2fe1f5364d50939b86... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Tuan-Phan/perf-arm_dsu-Support-DSU-ACPI-devices/20200910-105630 git checkout 40c3a0c70d4472e2fe1f5364d50939b863874fa1 vim +/dsu_pmu_acpi_match +799 drivers/perf/arm_dsu_pmu.c 798 800 { "ARMHD500", 0}, 801 {}, 802 }; 803 MODULE_DEVICE_TABLE(acpi, dsu_pmu_acpi_match); 804 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org