tree:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/linusw/linux-nomadik.git ux500-skomer
head:   7357fee56d5c76b95d19fbc0a7b08d0195b4846a
commit: be5f70b7d789ba870acbf1068e42a78e4a279d40 [5/7] uglyhack printascii
config: arm-defconfig (attached as .config)
compiler: arm-linux-gnueabi-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 be5f70b7d789ba870acbf1068e42a78e4a279d40
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=arm 

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

All errors (new ones prefixed by >>):

   init/main.o: In function `start_kernel':
>> main.c:(.init.text+0x71c): undefined reference to `printascii'
   kernel/printk/printk.o: In function `vprintk_store':
>> printk.c:(.text+0x2fc0): undefined reference to `printascii'

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