ERROR: "vmf_insert_mixed" [drivers/gpu/drm/exynos/exynosdrm.ko] undefined!

[kbuild test robot]

tree:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   bed38c3e2dca01b358a62b5e73b46e875742fd75
commit: 156bdac99061b4013c8e47799c6e574f7f84e9f4 drm/exynos: trigger build of all modules
date:   4 weeks ago
config: h8300-allmodconfig (attached as .config)
compiler: h8300-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 156bdac99061b4013c8e47799c6e574f7f84e9f4
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=h8300 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

>> ERROR: "vmf_insert_mixed" [drivers/gpu/drm/exynos/exynosdrm.ko] undefined!

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Attachment: .config.gz
Description: application/gzip