tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   cd557f1c605fc5a2c0eb0b540610f50dc67dd849
commit: 11e8f5fd223bd4d33fa10527bad3fe48469a15df [732/3150] drm: Add simpledrm driver
config: openrisc-randconfig-r026-20210518 (attached as .config)
compiler: or1k-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
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=11e8f5fd223bd4d33fa10527bad3fe48469a15df
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 11e8f5fd223bd4d33fa10527bad3fe48469a15df
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=openrisc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> or1k-linux-ld: drivers/video/fbdev/simplefb.o:(.rodata+0x2c): undefined reference to `cfb_fillrect'
>> or1k-linux-ld: drivers/video/fbdev/simplefb.o:(.rodata+0x30): undefined reference to `cfb_copyarea'
>> or1k-linux-ld: drivers/video/fbdev/simplefb.o:(.rodata+0x34): undefined reference to `cfb_imageblit'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org