tree: https://github.com/jimc/linux.git dyn-drm-trc head: df426d10840ccdda8ef29b66f8df55a010836a7c commit: 8315288913f387f0dad23819e847ae77d7991f8b [14/19] dyndbg: add _DPRINTK_FLAGS_ENABLED config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20220213/202202131417.lFsFyv0i-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/jimc/linux/commit/8315288913f387f0dad23819e847ae77d799... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dyn-drm-trc git checkout 8315288913f387f0dad23819e847ae77d7991f8b # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the jimc/dyn-drm-trc HEAD df426d10840ccdda8ef29b66f8df55a010836a7c builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): drivers/gpu/drm/drm_print.c: In function '__drm_dev_dbg': 289 | if (desc->flags & _DPRINTK_FLAGS_PRINT) | ^~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/drm_print.c:289:21: note: each undeclared identifier is reported only once for each function it appears in vim +/_DPRINTK_FLAGS_PRINT +289 drivers/gpu/drm/drm_print.c db87086492581c Joe Perches 2018-03-16 273 b3dababcea70ef Jim Cromie 2021-12-28 274 void __drm_dev_dbg(struct _ddebug *desc, const struct device *dev, b3dababcea70ef Jim Cromie 2021-12-28 275 enum drm_debug_category category, const char *format, ...) 02c9656b2f0d69 Haneen Mohammed 2017-10-17 276 { 02c9656b2f0d69 Haneen Mohammed 2017-10-17 277 struct va_format vaf; 02c9656b2f0d69 Haneen Mohammed 2017-10-17 278 va_list args; 02c9656b2f0d69 Haneen Mohammed 2017-10-17 279 f1a6b74f598212 Jim Cromie 2022-01-19 280 if (!__drm_debug_enabled(category)) 02c9656b2f0d69 Haneen Mohammed 2017-10-17 281 return; 02c9656b2f0d69 Haneen Mohammed 2017-10-17 282 b3dababcea70ef Jim Cromie 2021-12-28 283 /* we know we are printing for either syslog, tracefs, or both */ 02c9656b2f0d69 Haneen Mohammed 2017-10-17 284 va_start(args, format); 02c9656b2f0d69 Haneen Mohammed 2017-10-17 285 vaf.fmt = format; 02c9656b2f0d69 Haneen Mohammed 2017-10-17 286 vaf.va = &args; 02c9656b2f0d69 Haneen Mohammed 2017-10-17 287 b3dababcea70ef Jim Cromie 2021-12-28 288 if (dev) { b3dababcea70ef Jim Cromie 2021-12-28 @289 if (desc->flags & _DPRINTK_FLAGS_PRINT) db87086492581c Joe Perches 2018-03-16 290 dev_printk(KERN_DEBUG, dev, "[" DRM_NAME ":%ps] %pV", db87086492581c Joe Perches 2018-03-16 291 __builtin_return_address(0), &vaf); b3dababcea70ef Jim Cromie 2021-12-28 292 } else { b3dababcea70ef Jim Cromie 2021-12-28 293 if (desc->flags & _DPRINTK_FLAGS_PRINT) db87086492581c Joe Perches 2018-03-16 294 printk(KERN_DEBUG "[" DRM_NAME ":%ps] %pV", db87086492581c Joe Perches 2018-03-16 295 __builtin_return_address(0), &vaf); b3dababcea70ef Jim Cromie 2021-12-28 296 } 02c9656b2f0d69 Haneen Mohammed 2017-10-17 297 va_end(args); 02c9656b2f0d69 Haneen Mohammed 2017-10-17 298 } d101b390913238 Jim Cromie 2021-12-18 299 EXPORT_SYMBOL(__drm_dev_dbg); 02c9656b2f0d69 Haneen Mohammed 2017-10-17 300 :::::: The code at line 289 was first introduced by commit :::::: b3dababcea70ef41b80e5500eef493dcc7619756 drm_print: add _ddebug desc to drm_*dbg prototypes :::::: TO: Jim Cromie <jim.cromie(a)gmail.com&gt; :::::: CC: Jim Cromie <jim.cromie(a)gmail.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org