Hi, kernel test robot noticed the following build errors: [auto build test ERROR on bluetooth-next/master] [also build test ERROR on next-20230425] [cannot apply to bluetooth/master linus/master v6.3] [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/hildawu-realtek-com/Bluetooth-btrtl-Add-Realtek-devcoredump-support/20230420-185852 base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master patch link: https://lore.kernel.org/r/20230420105343.2014-1-hildawu%40realtek.com patch subject: [PATCH v3] Bluetooth: btrtl: Add Realtek devcoredump support config: arm-randconfig-r013-20230424 (https://download.01.org/0day-ci/archive/20230426/202304260422.XHBgACOW-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/intel-lab-lkp/linux/commit/dd7adb785f34ba9037f5c73dac879071302c636a git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review hildawu-realtek-com/Bluetooth-btrtl-Add-Realtek-devcoredump-support/20230420-185852 git checkout dd7adb785f34ba9037f5c73dac879071302c636a # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202304260422.XHBgACOW-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from drivers/bluetooth/btusb.c:27: >> drivers/bluetooth/btrtl.h:188:2: error: void function 'btrtl_set_driver_name' should not return a value [-Wreturn-type] return -EOPNOTSUPP; ^ ~~~~~~~~~~~ 1 error generated. vim +/btrtl_set_driver_name +188 drivers/bluetooth/btrtl.h 185 186 static inline void btrtl_set_driver_name(struct hci_dev *hdev, const char *driver_name) 187 { > 188 return -EOPNOTSUPP; 189 } 190 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests