Hi Thomas, I love your patch! Perhaps something to improve: [auto build test WARNING on next-20201209] [cannot apply to linus/master anholt/for-next v5.10-rc7 v5.10-rc6 v5.10-rc5 v5.10-rc7] [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/drm-Support-sh... base: 2f1d5c77f13fe64497c2e2601605f7d7ec4da9b1 config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/7e45591797810a937bff58af4db651833... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Thomas-Zimmermann/drm-Support-short-term-vmap-via-vmap_local/20201209-222628 git checkout 7e45591797810a937bff58af4db651833ef72abe # 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 warnings (new ones prefixed by >>): 57 | .vmap = drm_gem_dmabuf_vmap_local, | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/virtio/virtgpu_prime.c:57:11: note: (near initialization for 'virtgpu_dmabuf_ops.ops.vmap') drivers/gpu/drm/virtio/virtgpu_prime.c:58:13: warning: initialized field overwritten [-Woverride-init] 58 | .vunmap = drm_gem_dmabuf_vunmap_local, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/virtio/virtgpu_prime.c:58:13: note: (near initialization for 'virtgpu_dmabuf_ops.ops.vunmap') vim +57 drivers/gpu/drm/virtio/virtgpu_prime.c 45 46 static const struct virtio_dma_buf_ops virtgpu_dmabuf_ops = { 47 .ops = { 48 .cache_sgt_mapping = true, 49 .attach = virtio_dma_buf_attach, 50 .detach = drm_gem_map_detach, 51 .map_dma_buf = drm_gem_map_dma_buf, 52 .unmap_dma_buf = drm_gem_unmap_dma_buf, 53 .release = drm_gem_dmabuf_release, 54 .mmap = drm_gem_dmabuf_mmap, 55 .vmap = drm_gem_dmabuf_vmap, 56 .vunmap = drm_gem_dmabuf_vunmap, 58 .vunmap = drm_gem_dmabuf_vunmap_local, 59 }, 60 .device_attach = drm_gem_map_attach, 61 .get_uuid = virtgpu_virtio_get_uuid, 62 }; 63 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org