Hi Saravana, FYI, the error/warning still remains. tree: https://github.com/intel/linux-intel-lts.git 4.19/android_r head: 24f0fbfa4ad1b601f92d91cfcb7f01ad4d0f6acc commit: 3179a1a38d96f565a2229b9244285c6abf62b10a [15919/21549] ANDROID: GKI: clk: Add support for voltage voting config: microblaze-randconfig-r011-20210113 (attached as .config) compiler: microblaze-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/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=microblaze 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': 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 +/ignore +624 drivers/clk/clk.c 618 619 /* 620 * Update voltage level given the current votes. 621 */ 622 static int clk_update_vdd(struct clk_vdd_class *vdd_class) 623 { 625 struct regulator **r = vdd_class->regulator; 626 int *uv = vdd_class->vdd_uv; 627 int n_reg = vdd_class->num_regulators; 628 int cur_lvl = vdd_class->cur_level; 629 int max_lvl = vdd_class->num_levels - 1; 630 int cur_base = cur_lvl * n_reg; 631 int new_base; 632 633 /* aggregate votes */ 634 for (level = max_lvl; level > 0; level--) 635 if (vdd_class->level_votes[level]) 636 break; 637 638 if (level == cur_lvl) 639 return 0; 640 641 max_lvl = max_lvl * n_reg; 642 new_base = level * n_reg; 643 644 for (i = 0; i < vdd_class->num_regulators; i++) { 645 pr_debug("Set Voltage level Min %d, Max %d\n", uv[new_base + i], 646 uv[max_lvl + i]); 647 rc = regulator_set_voltage(r[i], uv[new_base + i], INT_MAX); 648 if (rc) 649 goto set_voltage_fail; 650 651 if (cur_lvl == 0 || cur_lvl == vdd_class->num_levels) 652 rc = regulator_enable(r[i]); 653 else if (level == 0) 654 rc = regulator_disable(r[i]); 655 if (rc) 656 goto enable_disable_fail; 657 } 658 659 if (vdd_class->set_vdd && !vdd_class->num_regulators) 660 rc = vdd_class->set_vdd(vdd_class, level); 661 662 if (!rc) 663 vdd_class->cur_level = level; 664 665 return rc; 666 667 enable_disable_fail: 668 regulator_set_voltage(r[i], uv[cur_base + i], INT_MAX); 669 670 set_voltage_fail: 671 for (i--; i >= 0; i--) { 672 regulator_set_voltage(r[i], uv[cur_base + i], INT_MAX); 673 if (cur_lvl == 0 || cur_lvl == vdd_class->num_levels) 674 regulator_disable(r[i]); 675 else if (level == 0) 676 ignore = regulator_enable(r[i]); 677 } 678 679 return rc; 680 } 681 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org