Hi Claudius, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on abelloni/rtc-next] [also build test WARNING on v5.12-rc3 next-20210316] [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/Claudius-Heine/rtc-rx6110-add-AC... base: https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next config: powerpc-randconfig-r006-20210316 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 50c7504a93fdb90c26870db8c8ea7add895c7725) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://github.com/0day-ci/linux/commit/ec344b93b1b5f4c2c77ce68b7bde7ec38... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Claudius-Heine/rtc-rx6110-add-ACPI-bindings-to-I2C/20210316-225026 git checkout ec344b93b1b5f4c2c77ce68b7bde7ec380e356a8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 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 rx6110_i2c_acpi_match[] = { ^ 1 warning generated. vim +/rx6110_i2c_acpi_match +450 drivers/rtc/rtc-rx6110.c 449 451 { "SECC6110" }, 452 { } 453 }; 454 MODULE_DEVICE_TABLE(acpi, rx6110_i2c_acpi_match); 455 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org