Hi Won, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on usb/usb-testing] [also build test WARNING on chrome-platform/for-next linus/master v5.17-rc6 next-20220228] [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] url: https://github.com/0day-ci/linux/commits/Won-Chung/usb-typec-Add-sysfs-support-for-Type-C-connector-s-physical-location/20220301-030738 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: hexagon-randconfig-r041-20220227 (https://download.01.org/0day-ci/archive/20220301/202203010628.Aac5rBDB-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e) 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/0day-ci/linux/commit/93d7a0fa1ed009ae6cc98fe5039cec8c9c77609f git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Won-Chung/usb-typec-Add-sysfs-support-for-Type-C-connector-s-physical-location/20220301-030738 git checkout 93d7a0fa1ed009ae6cc98fe5039cec8c9c77609f # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/usb/typec/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/usb/typec/class.c:1649:7: warning: no previous prototype for function 'get_pld' [-Wmissing-prototypes] void *get_pld(struct device *dev) ^ drivers/usb/typec/class.c:1649:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void *get_pld(struct device *dev) ^ static 1 warning generated. vim +/get_pld +1649 drivers/usb/typec/class.c 1648 > 1649 void *get_pld(struct device *dev) 1650 { 1651 #ifdef CONFIG_ACPI 1652 struct acpi_pld_info *pld; 1653 acpi_status status; 1654 1655 if (!has_acpi_companion(dev)) 1656 return NULL; 1657 1658 status = acpi_get_physical_device_location(ACPI_HANDLE(dev), &pld); 1659 if (ACPI_FAILURE(status)) 1660 return NULL; 1661 return pld; 1662 #else 1663 return NULL; 1664 #endif 1665 } 1666 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx