tree:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/linusw/linux-nomadik.git mtdparts
head:   05bbf79a61abe11ace5bdf9f21f7992ea117e475
commit: d35718b24f7d3239e97746c8f99ac1ef7da3a6ac [7/8] mtd: partions: Implement partition splitting
config: m68k-allmodconfig (attached as .config)
compiler: m68k-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 d35718b24f7d3239e97746c8f99ac1ef7da3a6ac
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=m68k 

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

All errors (new ones prefixed by >>):

>> ERROR: "mtd_partition_split" [drivers/mtd/mtd.ko] undefined!

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