[kbuild-all] [chrome-os:chromeos-4.14 16/19] drivers/gpu/drm/evdi/evdi_drv.c:74:6: error: no previous prototype for 'evdi_platform_device_is_free'

tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.14 head: 6f8992e59d85c46b0273cd2a3a9ab9cea8ddb4a1 commit: 035897f9d50e86b6b4508e09db23b7dab831dedc [16/19] CHROMIUM: drm/evdi: Use free platform device again after its parent was removed config: arm64-chromiumos-arm64-customedconfig-chrome-os:chromeos-4.14:1bf13820918c8ea2f8d01d646008dbc3c1cb5bee (attached as .config) compiler: aarch64-linux-gcc (GCC) 7.5.0 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 git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-4.14 git checkout 035897f9d50e86b6b4508e09db23b7dab831dedc # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): bool evdi_platform_device_is_free(struct platform_device *pdev) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/evdi/evdi_drv.c: In function 'add_device_with_usb_path': drivers/gpu/drm/evdi/evdi_drv.c:384:8: error: variable 'itf_token' set but not used [-Werror=unused-but-set-variable] char *itf_token = NULL; ^~~~~~~~~ cc1: all warnings being treated as errors vim +/evdi_platform_device_is_free +74 drivers/gpu/drm/evdi/evdi_drv.c 73 75 { 76 struct drm_device *drm_dev = 77 (struct drm_device *)platform_get_drvdata(pdev); 78 struct evdi_device *evdi = drm_dev->dev_private; 79 80 if (evdi && !evdi_painter_is_connected(evdi)) 81 return true; 82 return false; 83 } 84 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org