Hi Matthew, Thank you for the patch! Yet something to improve: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on drm-tip/drm-tip drm-exynos/exynos-drm-next drm/drm-next tegra-drm/drm/tegra/for-next v5.16-rc3 next-20211203] [cannot apply to airlied/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/Matthew-Brost/drm-i915-Rollback-seqno-when-request-creation-fails/20211204-020638 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: i386-randconfig-m021-20211203 (https://download.01.org/0day-ci/archive/20211204/202112040802.QqhQIE5v-lkp@xxxxxxxxx/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/af590220a3160c7a680487eac25eb2dc24baf42d git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Matthew-Brost/drm-i915-Rollback-seqno-when-request-creation-fails/20211204-020638 git checkout af590220a3160c7a680487eac25eb2dc24baf42d # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/i915/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/gpu/drm/i915/gt/intel_timeline.c: In function 'intel_timeline_rollback_seqno': >> drivers/gpu/drm/i915/gt/intel_timeline.c:306:2: error: implicit declaration of function 'timeline_rollback' [-Werror=implicit-function-declaration] 306 | timeline_rollback(tl); | ^~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/timeline_rollback +306 drivers/gpu/drm/i915/gt/intel_timeline.c 303 304 void intel_timeline_rollback_seqno(struct intel_timeline *tl) 305 { > 306 timeline_rollback(tl); 307 } 308 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx