tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git debugfs_cleanup head: 2af10af50dae1d4154ed0053ac8bd15d773b86e4 commit: 2f52245a70e7911407dfbea078f1a012764f8a42 [3/13] drm: make .debugfs_init and drm_debugfs_create_files() return void config: nds32-allmodconfig (attached as .config) compiler: nds32le-linux-gcc (GCC) 8.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 2f52245a70e7911407dfbea078f1a012764f8a42 # save the attached .config to linux build tree GCC_VERSION=8.1.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): .debugfs_init = mipi_dbi_debugfs_init, ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/tiny/hx8357d.c:200:19: note: (near initialization for 'hx8357d_driver.debugfs_init') cc1: some warnings being treated as errors -- .debugfs_init = mipi_dbi_debugfs_init, ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/tiny/ili9341.c:156:19: note: (near initialization for 'ili9341_driver.debugfs_init') cc1: some warnings being treated as errors -- .debugfs_init = mipi_dbi_debugfs_init, ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/tiny/mi0283qt.c:160:19: note: (near initialization for 'mi0283qt_driver.debugfs_init') cc1: some warnings being treated as errors -- .debugfs_init = mipi_dbi_debugfs_init, ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/tiny/st7586.c:298:19: note: (near initialization for 'st7586_driver.debugfs_init') cc1: some warnings being treated as errors -- .debugfs_init = mipi_dbi_debugfs_init, ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/tiny/st7735r.c:130:19: note: (near initialization for 'st7735r_driver.debugfs_init') cc1: some warnings being treated as errors vim +200 drivers/gpu/drm/tiny/hx8357d.c f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 194 f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 195 static struct drm_driver hx8357d_driver = { 0424fdaf883a68 drivers/gpu/drm/tinydrm/hx8357d.c Daniel Vetter 2019-06-17 196 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 197 .fops = &hx8357d_fops, 3eba3922819fe2 drivers/gpu/drm/tinydrm/hx8357d.c Noralf Trønnes 2019-02-25 198 .release = mipi_dbi_release, 3db8d37dd84e93 drivers/gpu/drm/tinydrm/hx8357d.c Noralf Trønnes 2018-11-10 199 DRM_GEM_CMA_VMAP_DRIVER_OPS, f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 @200 .debugfs_init = mipi_dbi_debugfs_init, f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 201 .name = "hx8357d", f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 202 .desc = "HX8357D", f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 203 .date = "20181023", f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 204 .major = 1, f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 205 .minor = 0, f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 206 }; f300c86e33a686 drivers/gpu/drm/tinydrm/hx8357d.c Eric Anholt 2018-10-24 207 :::::: The code at line 200 was first introduced by commit :::::: f300c86e33a686c7abcf0c37deee04ef666ed78b drm: Add an hx8367d tinydrm driver. :::::: TO: Eric Anholt <eric(a)anholt.net&gt; :::::: CC: Eric Anholt <eric(a)anholt.net&gt; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation