Hi Gurchetan, I love your patch! Perhaps something to improve: [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on drm-tip/drm-tip linus/master next-20200814] [cannot apply to tegra-drm/drm/tegra/for-next drm/drm-next drm-exynos/exynos-drm-next v5.8] [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/Gurchetan-Singh/Blob-prerequisit... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: parisc-randconfig-s031-20200813 (attached as .config) compiler: hppa-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-168-g9554805c-dirty # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +1210 drivers/gpu/drm/virtio/virtgpu_vq.c 1188 1189 int virtio_gpu_cmd_map(struct virtio_gpu_device *vgdev, 1190 struct virtio_gpu_object_array *objs, uint64_t offset) 1191 { 1192 struct virtio_gpu_resource_map_blob *cmd_p; 1193 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]); 1194 struct virtio_gpu_vbuffer *vbuf; 1195 struct virtio_gpu_resp_map_info *resp_buf; 1196 1197 resp_buf = kzalloc(sizeof(*resp_buf), GFP_KERNEL); 1198 if (!resp_buf) { 1199 virtio_gpu_array_put_free(objs); 1200 return -ENOMEM; 1201 } 1202 1203 cmd_p = virtio_gpu_alloc_cmd_resp(vgdev, 1204 virtio_gpu_cmd_resource_map_cb, &vbuf, sizeof(*cmd_p), 1205 sizeof(struct virtio_gpu_resp_map_info), resp_buf); 1206 memset(cmd_p, 0, sizeof(*cmd_p)); 1207 1208 cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB); 1209 cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle); 1211 vbuf->objs = objs; 1212 1213 virtio_gpu_queue_ctrl_buffer(vgdev, vbuf); 1214 return 0; 1215 } 1216 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org