Hi Luca, I love your patch! Perhaps something to improve: [auto build test WARNING on lee-mfd/for-mfd-next] [also build test WARNING on abelloni/rtc-next linux/master linus/master v5.15-rc5 next-20211011] [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/Luca-Ceresoli/Add-MAX77714-PMIC-minimal-driver-RTC-and-watchdog-only/20211012-042754 base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next config: hexagon-randconfig-r035-20211012 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dcf39554dbea780d6cb7e12239451ba47a2668) 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/56e2a213fef77c0aac171f8178abf3f20519f0b5 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Luca-Ceresoli/Add-MAX77714-PMIC-minimal-driver-RTC-and-watchdog-only/20211012-042754 git checkout 56e2a213fef77c0aac171f8178abf3f20519f0b5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/mfd/max77714.c:139:34: warning: unused variable 'max77714_dt_match' [-Wunused-const-variable] static const struct of_device_id max77714_dt_match[] = { ^ 1 warning generated. vim +/max77714_dt_match +139 drivers/mfd/max77714.c 138 > 139 static const struct of_device_id max77714_dt_match[] = { 140 { .compatible = "maxim,max77714" }, 141 {}, 142 }; 143 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org