Hi Vaishnav, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on char-misc/char-misc-testing] [also build test WARNING on linux/master robh/for-next soc/for-next linus/master v5.9-rc1 next-20200818] [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/Vaishnav-M-A/mikroBUS-driver-for... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 9123e3a74ec7b934a4a099e98af6a61c2f80bbf5 config: sh-allmodconfig (attached as .config) compiler: sh4-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh 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/misc/mikrobus/mikrobus_manifest.c: In function 'mikrobus_manifest_parse_devices': 363 | int retval; | ^~~~~~ # https://github.com/0day-ci/linux/commit/c988bea7af28a40a4c0a835b6765a2c4f... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Vaishnav-M-A/mikroBUS-driver-for-add-on-boards/20200818-205058 git checkout c988bea7af28a40a4c0a835b6765a2c4fe154c04 vim +/retval +363 drivers/misc/mikrobus/mikrobus_manifest.c 358 359 static int mikrobus_manifest_parse_devices(struct addon_board_info *board) 360 { 361 struct greybus_descriptor_device *desc_device; 362 struct manifest_desc *desc, *next; 364 int devcount = 0; 365 366 list_for_each_entry_safe(desc, next, &board->manifest_descs, links) { 367 if (desc->type != GREYBUS_TYPE_DEVICE) 368 continue; 369 desc_device = desc->data; 370 retval = mikrobus_manifest_attach_device(board, desc_device); 371 devcount++; 372 } 373 return devcount; 374 } 375 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org