tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.4 head: f168014a651b2518e9ddabffd470e264b39fc655 commit: 7c5e01902547a81d7d8b073eb3f130814d9125d9 [17/22] BACKPORT: FROMGIT: virtio: fix build for configs without dma-bufs config: m68k-allyesconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 7c5e01902547a81d7d8b073eb3f130814d9125d9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k 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 >>): m68k-linux-ld: drivers/media/virtio/virtio_video_device.o: in function `virtio_video_buf_init': m68k-linux-ld: drivers/media/virtio/virtio_video_device.o: in function `virtio_video_buf_prepare': virtio_video_device.c:(.text+0xcae): undefined reference to `virtio_dma_buf_get_uuid' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org