Hi "Jonathan, I love your patch! Perhaps something to improve: [auto build test WARNING on pinctrl/devel] [also build test WARNING on robh/for-next linus/master v5.13-rc4 next-20210603] [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/Jonathan-Neusch-fer/Nuvoton-WPCM450-pinctrl-and-GPIO-driver/20210602-200629 base: https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git devel config: x86_64-randconfig-a004-20210603 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d8e0ae9a76a62bdc6117630d59bf9967ac9bb4ea) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/42f026e0692ea0083822284f98d2b82dcb6141ef git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jonathan-Neusch-fer/Nuvoton-WPCM450-pinctrl-and-GPIO-driver/20210602-200629 git checkout 42f026e0692ea0083822284f98d2b82dcb6141ef # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c:1564:41: warning: format specifies type 'int' but the argument has type 'unsigned long' [-Wformat] dev_dbg(npcm->dev, "group size: %d\n", ARRAY_SIZE(npcm7xx_groups)); ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~ %lu include/linux/dev_printk.h:126:46: note: expanded from macro 'dev_dbg' dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ include/linux/kernel.h:42:25: note: expanded from macro 'ARRAY_SIZE' #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +1564 drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c 3b588e43ee5c7a Tomer Maimon 2018-08-08 1559 3b588e43ee5c7a Tomer Maimon 2018-08-08 1560 static int npcm7xx_get_groups_count(struct pinctrl_dev *pctldev) 3b588e43ee5c7a Tomer Maimon 2018-08-08 1561 { 3b588e43ee5c7a Tomer Maimon 2018-08-08 1562 struct npcm7xx_pinctrl *npcm = pinctrl_dev_get_drvdata(pctldev); 3b588e43ee5c7a Tomer Maimon 2018-08-08 1563 3b588e43ee5c7a Tomer Maimon 2018-08-08 @1564 dev_dbg(npcm->dev, "group size: %d\n", ARRAY_SIZE(npcm7xx_groups)); 3b588e43ee5c7a Tomer Maimon 2018-08-08 1565 return ARRAY_SIZE(npcm7xx_groups); 3b588e43ee5c7a Tomer Maimon 2018-08-08 1566 } 3b588e43ee5c7a Tomer Maimon 2018-08-08 1567 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org