[kbuild-all] [linusw-nomadik:ux500-href-charging-v5.16-rc1 47/58] drivers/power/supply/ab8500_chargalg.c:822:13: warning: variable 'delta_i_ua' set but not used

tree: https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git ux500-href-charging-v5.16-rc1 head: 1e846b0b60ac01cac4f283975a1bc395ff73d995 commit: e067307b004b5f2699464dd37d10817677ce9bf3 [47/58] power: supply: ab8500_chargalg: Drop charging step config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20220117/202201171004.E3chM4HB-lk...) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 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://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git/... git remote add linusw-nomadik https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git git fetch --no-tags linusw-nomadik ux500-href-charging-v5.16-rc1 git checkout e067307b004b5f2699464dd37d10817677ce9bf3 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash drivers/power/supply/ 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/power/supply/ab8500_chargalg.c: In function 'ab8500_chargalg_chg_curr_maxim': 822 | int delta_i_ua; | ^~~~~~~~~~ vim +/delta_i_ua +822 drivers/power/supply/ab8500_chargalg.c 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 810 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 811 /** c5b64a990e7f3b drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-07-13 812 * ab8500_chargalg_chg_curr_maxim - increases the charger current to 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 813 * compensate for the system load c5b64a990e7f3b drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-07-13 814 * @di pointer to the ab8500_chargalg structure 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 815 * 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 816 * This maximization function is used to raise the charger current to get the 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 817 * battery current as close to the optimal value as possible. The battery 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 818 * current during charging is affected by the system load 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 819 */ c5b64a990e7f3b drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-07-13 820 static enum maxim_ret ab8500_chargalg_chg_curr_maxim(struct ab8500_chargalg *di) 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 821 { d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 @822 int delta_i_ua; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 823 b0284de05e07d5 drivers/power/abx500_chargalg.c Lee Jones 2012-11-30 824 if (!di->bm->maxi->ena_maxi) 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 825 return MAXIM_RET_NOACTION; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 826 d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 827 delta_i_ua = di->ccm.original_iset_ua - di->batt_data.inst_curr_ua; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 828 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 829 if (di->events.vbus_collapsed) { 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 830 dev_dbg(di->dev, "Charger voltage has collapsed %d\n", 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 831 di->ccm.wait_cnt); 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 832 if (di->ccm.wait_cnt == 0) { 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 833 dev_dbg(di->dev, "lowering current\n"); 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 834 di->ccm.wait_cnt++; b0284de05e07d5 drivers/power/abx500_chargalg.c Lee Jones 2012-11-30 835 di->ccm.condition_cnt = di->bm->maxi->wait_cycles; e067307b004b5f drivers/power/supply/ab8500_chargalg.c Linus Walleij 2022-01-04 836 di->ccm.max_current_ua = di->ccm.current_iset_ua; d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 837 di->ccm.current_iset_ua = di->ccm.max_current_ua; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 838 di->ccm.level--; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 839 return MAXIM_RET_CHANGE; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 840 } else { 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 841 dev_dbg(di->dev, "waiting\n"); 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 842 /* Let's go in here twice before lowering curr again */ 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 843 di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 844 return MAXIM_RET_NOACTION; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 845 } 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 846 } 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 847 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 848 di->ccm.wait_cnt = 0; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 849 d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 850 if (di->batt_data.inst_curr_ua > di->ccm.original_iset_ua) { d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 851 dev_dbg(di->dev, " Maximization Ibat (%duA) too high" d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 852 " (limit %duA) (current iset: %duA)!\n", d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 853 di->batt_data.inst_curr_ua, di->ccm.original_iset_ua, d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 854 di->ccm.current_iset_ua); 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 855 d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 856 if (di->ccm.current_iset_ua == di->ccm.original_iset_ua) 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 857 return MAXIM_RET_NOACTION; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 858 b0284de05e07d5 drivers/power/abx500_chargalg.c Lee Jones 2012-11-30 859 di->ccm.condition_cnt = di->bm->maxi->wait_cycles; d3e41d1547389a drivers/power/supply/ab8500_chargalg.c Linus Walleij 2021-11-13 860 di->ccm.current_iset_ua = di->ccm.original_iset_ua; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 861 di->ccm.level = 0; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 862 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 863 return MAXIM_RET_IBAT_TOO_HIGH; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 864 } 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 865 b0284de05e07d5 drivers/power/abx500_chargalg.c Lee Jones 2012-11-30 866 di->ccm.condition_cnt = di->bm->maxi->wait_cycles; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 867 return MAXIM_RET_NOACTION; 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 868 } 1668f81159fb72 drivers/power/abx500_chargalg.c Arun Murthy 2012-02-29 869 :::::: The code at line 822 was first introduced by commit :::::: d3e41d1547389a87ac7b6c311ed8243d0fc9fa7b power: supply: ab8500: Standardize CC current :::::: TO: Linus Walleij <linus.walleij(a)linaro.org&gt; :::::: CC: Linus Walleij <linus.walleij(a)linaro.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org