Hi Saravana, FYI, the error/warning still remains. tree: https://github.com/intel/linux-intel-lts.git 4.19/android_r head: 71dbe8b787e34f3ce300217fc6ca5a2ec4aef447 commit: 3179a1a38d96f565a2229b9244285c6abf62b10a [15919/23451] ANDROID: GKI: clk: Add support for voltage voting config: arm-randconfig-r034-20210622 (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/intel/linux-intel-lts/commit/3179a1a38d96f565a2229b924... git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-linux-intel-lts 4.19/android_r git checkout 3179a1a38d96f565a2229b9244285c6abf62b10a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 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/clk/clk.c: In function 'clk_update_vdd': drivers/clk/clk.c:624:24: warning: variable 'ignore' set but not used [-Wunused-but-set-variable] 624 | int level, rc = 0, i, ignore; | ^~~~~~ drivers/clk/clk.c: At top level: 3145 | int clk_set_flags(struct clk *clk, unsigned long flags) | ^~~~~~~~~~~~~ 3157 | void clk_debug_print_hw(struct clk_core *clk, struct seq_file *f) | ^~~~~~~~~~~~~~~~~~ drivers/clk/clk.c:4257: warning: Function parameter or member 'dev' not described in 'devm_clk_unregister' drivers/clk/clk.c:4455: warning: Function parameter or member 'get_hw' not described in 'of_clk_provider' vim +/clk_set_flags +3145 drivers/clk/clk.c 3144 3146 { 3147 if (!clk) 3148 return 0; 3149 3150 if (!clk->core->ops->set_flags) 3151 return -EINVAL; 3152 3153 return clk->core->ops->set_flags(clk->core->hw, flags); 3154 } 3155 EXPORT_SYMBOL_GPL(clk_set_flags); 3156 3158 { 3159 } 3160 EXPORT_SYMBOL(clk_debug_print_hw); 3161 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org