Hi Srinivas, I love your patch! Yet something to improve: [auto build test ERROR on asoc/for-next] [also build test ERROR on robh/for-next sound/for-next v5.12-rc7 next-20210414] [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/Srinivas-Kandagatla/ASoC-codecs-add-wcd938x-support/20210414-235130 base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next config: arm-randconfig-r035-20210414 (attached as .config) compiler: arm-linux-gnueabi-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/ba396524328b903f88e69b337694bdcd29615381 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Srinivas-Kandagatla/ASoC-codecs-add-wcd938x-support/20210414-235130 git checkout ba396524328b903f88e69b337694bdcd29615381 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): arm-linux-gnueabi-ld: sound/soc/codecs/wcd938x.o: in function `wcd938x_sdw_free': >> wcd938x.c:(.text+0x1d8): undefined reference to `sdw_stream_remove_slave' arm-linux-gnueabi-ld: sound/soc/codecs/wcd938x.o: in function `wcd938x_sdw_hw_params': >> wcd938x.c:(.text+0x418): undefined reference to `sdw_stream_add_slave' arm-linux-gnueabi-ld: sound/soc/codecs/wcd938x.o: in function `wcd938x_bind': >> wcd938x.c:(.text+0x1704): undefined reference to `__devm_regmap_init_sdw' >> arm-linux-gnueabi-ld: wcd938x.c:(.text+0x18b8): undefined reference to `sdw_bus_type' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org