Hi Sanket, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on wsa/i2c/for-next] [also build test WARNING on v5.12-rc2 next-20210309] [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/Sanket-Goswami/i2c-add-i2c-bus-driver-for-amd-navi-gpu/20210309-213535 base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next config: arm-randconfig-r033-20210308 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 820f508b08d7c94b2dd7847e9710d2bc36d3dd45) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/0day-ci/linux/commit/f1d0b9c128d45f6d55f3d3f864db2e7ebf42adc5 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Sanket-Goswami/i2c-add-i2c-bus-driver-for-amd-navi-gpu/20210309-213535 git checkout f1d0b9c128d45f6d55f3d3f864db2e7ebf42adc5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/i2c/busses/i2c-designware-master.c:899:5: warning: no previous prototype for function 'amd_i2c_adap_quirk' [-Wmissing-prototypes] int amd_i2c_adap_quirk(struct dw_i2c_dev *amdev) ^ drivers/i2c/busses/i2c-designware-master.c:899:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int amd_i2c_adap_quirk(struct dw_i2c_dev *amdev) ^ static 1 warning generated. vim +/amd_i2c_adap_quirk +899 drivers/i2c/busses/i2c-designware-master.c 898 > 899 int amd_i2c_adap_quirk(struct dw_i2c_dev *amdev) 900 { 901 struct i2c_adapter *amdap = &amdev->adapter; 902 int ret; 903 904 if (!(amdev->flags & AMD_NON_INTR_MODE)) 905 return -ENODEV; 906 907 return i2c_add_numbered_adapter(amdap); 908 909 return ret; 910 } 911 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org