Hi Paul,

[auto build test ERROR on mtd/master]
[also build test ERROR on v4.9 next-20161221]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Paul-Gortmaker/mtd-nand-fix-implicit-module-h-usage-in-xway_nand-c/20161221-115714
base:   git://git.infradead.org/linux-mtd.git master
config: mips-xway_defconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   arch/mips/built-in.o: In function `vpe_run':
>> (.text+0x148f0): undefined reference to `physical_memsize'
   arch/mips/built-in.o: In function `vpe_run':
   (.text+0x148f4): undefined reference to `physical_memsize'

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