Hi Thomas, I love your patch! Yet something to improve: [auto build test ERROR on next-20200914] [also build test ERROR on v5.9-rc5] [cannot apply to linuxtv-media/master drm-intel/for-linux-next tegra/for-next linus/master v5.9-rc5 v5.9-rc4 v5.9-rc3] [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/Thomas-Zimmermann/dma-buf-Flag-v... base: f965d3ec86fa89285db0fbb983da76ba9c398efa config: i386-randconfig-r034-20200913 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): In file included from drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c:291: 89 | .vmap = mock_dmabuf_vmap, | ^~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c:89:10: note: (near initialization for 'mock_dmabuf_ops.vmap') cc1: some warnings being treated as errors # https://github.com/0day-ci/linux/commit/b9513704e28f25636f00827154183df60... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Thomas-Zimmermann/dma-buf-Flag-vmap-ed-memory-as-system-or-I-O-memory/20200914-192712 git checkout b9513704e28f25636f00827154183df60a80d95c vim +89 drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 83 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 84 static const struct dma_buf_ops mock_dmabuf_ops = { 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 85 .map_dma_buf = mock_map_dma_buf, 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 86 .unmap_dma_buf = mock_unmap_dma_buf, 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 87 .release = mock_dmabuf_release, 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 88 .mmap = mock_dmabuf_mmap, 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 @89 .vmap = mock_dmabuf_vmap, 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 90 .vunmap = mock_dmabuf_vunmap, 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 91 }; 6cca22ede8a448 drivers/gpu/drm/i915/selftests/mock_dmabuf.c Chris Wilson 2017-02-13 92 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org