Hi Lukasz, kernel test robot noticed the following build warnings: [auto build test WARNING on rafael-pm/linux-next] [also build test WARNING on linus/master next-20240315] [cannot apply to krzk/for-next clk/clk-next soc/for-next rafael-pm/acpi-bus rafael-pm/devprop v6.8] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Lukasz-Luba/OPP-OF-Export-dev_opp_pm_calc_power-for-usage-from-EM/20240314-220719 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next patch link: https://lore.kernel.org/r/20240314140421.3563571-4-lukasz.luba%40arm.com patch subject: [PATCH 3/4] PM: EM: Add em_dev_update_chip_binning() config: i386-randconfig-141-20240315 (https://download.01.org/0day-ci/archive/20240316/202403160033.Kh6R75dh-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240316/202403160033.Kh6R75dh-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202403160033.Kh6R75dh-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> kernel/power/energy_model.c:824:52: warning: variable 'ret' is uninitialized when used here [-Wuninitialized] 824 | dev_warn(dev, "Couldn't find Energy Model %d\n", ret); | ^~~ include/linux/dev_printk.h:146:70: note: expanded from macro 'dev_warn' 146 | dev_printk_index_wrap(_dev_warn, KERN_WARNING, dev, dev_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~ include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap' 110 | _p_func(dev, fmt, ##__VA_ARGS__); \ | ^~~~~~~~~~~ kernel/power/energy_model.c:817:12: note: initialize the variable 'ret' to silence this warning 817 | int i, ret; | ^ | = 0 1 warning generated. vim +/ret +824 kernel/power/energy_model.c 800 801 /** 802 * em_dev_update_chip_binning() - Update Energy Model with new values after 803 * the new voltage information is present in the OPPs. 804 * @dev : Device for which the Energy Model has to be updated. 805 * 806 * This function allows to update easily the EM with new values available in 807 * the OPP framework and DT. It can be used after the chip has been properly 808 * verified by device drivers and the voltages adjusted for the 'chip binning'. 809 * It uses the "dynamic-power-coefficient" DT property to calculate the power 810 * values for EM. For power calculation it uses the new adjusted voltage 811 * values known for OPPs, which might be changed after boot. 812 */ 813 int em_dev_update_chip_binning(struct device *dev) 814 { 815 struct em_perf_table __rcu *em_table; 816 struct em_perf_domain *pd; 817 int i, ret; 818 819 if (IS_ERR_OR_NULL(dev)) 820 return -EINVAL; 821 822 pd = em_pd_get(dev); 823 if (!pd) { > 824 dev_warn(dev, "Couldn't find Energy Model %d\n", ret); -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
