Hi Philipp, I love your patch! Perhaps something to improve: [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on drm-tip/drm-tip linus/master v5.9-rc2 next-20200827] [cannot apply to drm/drm-next] [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/Philipp-Zabel/drm-add-drmm_encoder_alloc/20200828-000957 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: arm-randconfig-r003-20200827 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c10e63677f5d20f18010f8f68c631ddc97546f7d) 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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 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/gpu/drm/drm_plane.c:301:6: warning: variable 'ap' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] if (name) ^~~~ drivers/gpu/drm/drm_plane.c:305:19: note: uninitialized use occurs here type, name, ap); ^~ drivers/gpu/drm/drm_plane.c:301:2: note: remove the 'if' if its condition is always true if (name) ^~~~~~~~~ drivers/gpu/drm/drm_plane.c:298:2: note: variable 'ap' is declared here va_list ap; ^ drivers/gpu/drm/drm_plane.c:344:6: warning: variable 'ap' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] if (name) ^~~~ drivers/gpu/drm/drm_plane.c:348:19: note: uninitialized use occurs here type, name, ap); ^~ drivers/gpu/drm/drm_plane.c:344:2: note: remove the 'if' if its condition is always true if (name) ^~~~~~~~~ drivers/gpu/drm/drm_plane.c:332:2: note: variable 'ap' is declared here va_list ap; ^ 2 warnings generated. # https://github.com/0day-ci/linux/commit/5f2373dfa20624f32ff28097eb734511ed8ca13e git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Philipp-Zabel/drm-add-drmm_encoder_alloc/20200828-000957 git checkout 5f2373dfa20624f32ff28097eb734511ed8ca13e vim +301 drivers/gpu/drm/drm_plane.c 271 272 /** 273 * drm_universal_plane_init - Initialize a new universal plane object 274 * @dev: DRM device 275 * @plane: plane object to init 276 * @possible_crtcs: bitmask of possible CRTCs 277 * @funcs: callbacks for the new plane 278 * @formats: array of supported formats (DRM_FORMAT\_\*) 279 * @format_count: number of elements in @formats 280 * @format_modifiers: array of struct drm_format modifiers terminated by 281 * DRM_FORMAT_MOD_INVALID 282 * @type: type of plane (overlay, primary, cursor) 283 * @name: printf style format string for the plane name, or NULL for default name 284 * 285 * Initializes a plane object of type @type. 286 * 287 * Returns: 288 * Zero on success, error code on failure. 289 */ 290 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 291 uint32_t possible_crtcs, 292 const struct drm_plane_funcs *funcs, 293 const uint32_t *formats, unsigned int format_count, 294 const uint64_t *format_modifiers, 295 enum drm_plane_type type, 296 const char *name, ...) 297 { 298 va_list ap; 299 int ret; 300 > 301 if (name) 302 va_start(ap, name); 303 ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 304 formats, format_count, format_modifiers, 305 type, name, ap); 306 if (name) 307 va_end(ap); 308 return ret; 309 } 310 EXPORT_SYMBOL(drm_universal_plane_init); 311 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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