Hi Tzung-Bi, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 6014cfa5bf32cf8c5c58b3cfd5ee0e1542c8a825 commit: 40f58143745eaabc68ef44b068642ca3b38d23a6 [1595/10906] platform/chrome: cros_kbd_led_backlight: support EC PWM backend config: s390-randconfig-r023-20220717 (https://download.01.org/0day-ci/archive/20220717/202207170538.MR39dw8m-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 07022e6cf9b5b3baa642be53d0b3c3f1c403dbfd) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=40f58143745eaabc68ef44b068642ca3b38d23a6 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 40f58143745eaabc68ef44b068642ca3b38d23a6 # 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=s390 SHELL=/bin/bash drivers/iio/light/ drivers/platform/chrome/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/platform/chrome/cros_kbd_led_backlight.c:183:42: warning: unused variable 'keyboard_led_drvdata_ec_pwm' [-Wunused-const-variable] static const struct keyboard_led_drvdata keyboard_led_drvdata_ec_pwm = { ^ 1 warning generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for DRM_DP_AUX_BUS Depends on HAS_IOMEM && DRM && OF Selected by - DRM_MSM && HAS_IOMEM && DRM && (ARCH_QCOM || SOC_IMX5 || COMPILE_TEST && COMMON_CLK && IOMMU_SUPPORT && (QCOM_OCMEM || QCOM_OCMEM && (QCOM_LLCC || QCOM_LLCC && (QCOM_COMMAND_DB || QCOM_COMMAND_DB vim +/keyboard_led_drvdata_ec_pwm +183 drivers/platform/chrome/cros_kbd_led_backlight.c 182 > 183 static const struct keyboard_led_drvdata keyboard_led_drvdata_ec_pwm = { 184 .init = keyboard_led_init_ec_pwm, 185 .brightness_set_blocking = keyboard_led_set_brightness_ec_pwm, 186 .brightness_get = keyboard_led_get_brightness_ec_pwm, 187 .max_brightness = KEYBOARD_BACKLIGHT_MAX, 188 }; 189 -- 0-DAY CI Kernel Test Service https://01.org/lkp
