[PATCH] mtd: avoid stack overflow in MTD CFI code

[kbuild test robot]

Hi Arnd,

[auto build test WARNING on v4.5-rc1]
[also build test WARNING on next-20160125]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Arnd-Bergmann/mtd-avoid-stack-overflow-in-MTD-CFI-code/20160125-234611
config: um-allmodconfig (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=um 

All warnings (new ones prefixed by >>):

warning: (MTD_MAP_BANK_WIDTH_32) selects MTD_COMPLEX_MAPPINGS which has unmet direct dependencies (MTD && HAS_IOMEM)

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