[kbuild-all] ld: drivers/video/fbdev/simplefb.o:undefined reference to `cfb_fillrect'

Hi Thomas, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: fa54d366a6e4fe3e16322abdb8b5115f8be0da8b commit: 11e8f5fd223bd4d33fa10527bad3fe48469a15df drm: Add simpledrm driver date: 4 months ago config: i386-randconfig-r026-20210821 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 11e8f5fd223bd4d33fa10527bad3fe48469a15df # save the attached .config 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 >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org