Hi Andreas, kernel test robot noticed the following build warnings: [auto build test WARNING on robh/for-next] [also build test WARNING on lee-mfd/for-mfd-next linus/master v6.7-rc2 next-20231124] [cannot apply to tmlind-omap/for-next lee-mfd/for-mfd-fixes] [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/Andreas-Kemnade/dt-bindings-mfd-ti-twl-Document-system-power-controller/20231125-173426 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next patch link: https://lore.kernel.org/r/20231125092938.16535-3-andreas%40kemnade.info patch subject: [PATCH 2/6] twl-core: add power off implementation for twl603x config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20231126/202311260213.vq3gMAgF-lkp@xxxxxxxxx/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231126/202311260213.vq3gMAgF-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/202311260213.vq3gMAgF-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/mfd/twl-core.c:690:6: warning: no previous prototype for function 'twl6030_power_off' [-Wmissing-prototypes] void twl6030_power_off(void) ^ drivers/mfd/twl-core.c:690:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void twl6030_power_off(void) ^ static 1 warning generated. vim +/twl6030_power_off +690 drivers/mfd/twl-core.c 689 > 690 void twl6030_power_off(void) 691 { 692 #define APP_DEVOFF (1<<0) 693 #define CON_DEVOFF (1<<1) 694 #define MOD_DEVOFF (1<<2) 695 696 int err; 697 u8 val; 698 699 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val, 700 TWL6030_PHOENIX_DEV_ON); 701 if (err) { 702 pr_err("I2C error %d reading PHOENIX_DEV_ON\n", err); 703 return; 704 } 705 706 val |= APP_DEVOFF | CON_DEVOFF | MOD_DEVOFF; 707 708 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val, 709 TWL6030_PHOENIX_DEV_ON); 710 if (err) 711 pr_err("TWL6030 Unable to power off\n"); 712 } 713 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
