Hi Maarten, I love your 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/drm-next next-20220110] [cannot apply to drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next airlied/drm-next v5.16] [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/Maarten-Lankhorst/drm-i915-Remov... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20220111/202201110312.Jy9aTX6l-lk...) 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/944270fef255e0cdb97d2804f8df6b9fb... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Maarten-Lankhorst/drm-i915-Remove-short-term-pins-from-execbuf-by-requiring-lock-to-unbind/20220110-195316 git checkout 944270fef255e0cdb97d2804f8df6b9fb288b753 # 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; All errors (new ones prefixed by >>): drivers/gpu/drm/i915/gem/i915_gem_pages.c: In function 'i915_gem_object_writeback': 174 | assert_object_held_shared(obj); | ^~~~~~~~~~~~~~~~~~~~~~~~~ | assert_object_held cc1: all warnings being treated as errors vim +174 drivers/gpu/drm/i915/gem/i915_gem_pages.c f033428db28bdf Chris Wilson 2019-05-28 170 f033428db28bdf Chris Wilson 2019-05-28 171 /* Try to discard unwanted pages */ f033428db28bdf Chris Wilson 2019-05-28 172 void i915_gem_object_writeback(struct drm_i915_gem_object *obj) f033428db28bdf Chris Wilson 2019-05-28 173 { a3258dbd87f1f6 Thomas Hellström 2021-03-23 @174 assert_object_held_shared(obj); f033428db28bdf Chris Wilson 2019-05-28 175 GEM_BUG_ON(i915_gem_object_has_pages(obj)); f033428db28bdf Chris Wilson 2019-05-28 176 f033428db28bdf Chris Wilson 2019-05-28 177 if (obj->ops->writeback) f033428db28bdf Chris Wilson 2019-05-28 178 obj->ops->writeback(obj); f033428db28bdf Chris Wilson 2019-05-28 179 } f033428db28bdf Chris Wilson 2019-05-28 180 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org