Hi Shihlun, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on linux/master v5.9] [cannot apply to lee-mfd/for-mfd-next next-20201013] [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/Shihlun-Lin/mfd-ahc1ec0-Add-supp... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b5fc7a89e58bcc059a3d5e4db79c481fb437de59 config: parisc-randconfig-r003-20201014 (attached as .config) compiler: hppa-linux-gcc (GCC) 9.3.0 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://github.com/0day-ci/linux/commit/c0d1228cbc430e5be6ac8a311f8fa783f... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Shihlun-Lin/mfd-ahc1ec0-Add-support-for-Advantech-embedded-controller/20201014-164627 git checkout c0d1228cbc430e5be6ac8a311f8fa783f9285628 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc 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 >>): drivers/mfd/ahc1ec0-wdt.c: In function 'wdt_proc_read': 162 | unsigned char *name, *chip_name, *is_enable; | ^~~~ drivers/mfd/ahc1ec0-wdt.c: In function 'adv_ec_wdt_probe': 426 | struct adv_ec_platform_data *adv_ec_data; | ^~~~~~~~~~~ vim +/name +162 drivers/mfd/ahc1ec0-wdt.c 159 160 static int wdt_proc_read(struct seq_file *m, void *p) 161 { 163 unsigned long current_timeout = 0; 164 165 name = m->private; 166 167 chip_name = wdt_data.chip_name; 168 current_timeout = wdt_data.current_timeout; 169 is_enable = wdt_data.is_enable; 170 171 seq_printf(m, "name : %s\n", chip_name); 172 seq_printf(m, "timeout : %ld\n", current_timeout); 173 seq_printf(m, "is_enable : %s\n", is_enable); 174 175 return 0; 176 } 177 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org