Re: [PATCH v3 3/3] serial: core: Allow skipping old serial port initialization

[kbuild test robot]

Hi Daniel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v4.16-rc4]
[also build test ERROR on next-20180316]
[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/Daniel-Kurtz/Add-earlycon-support-for-AMD-Carrizo-Stoneyridge/20180318-024830
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

All errors (new ones prefixed by >>):

   drivers/acpi/spcr.o: In function `acpi_parse_spcr':
>> spcr.c:(.init.text+0x540): undefined reference to `serial8250_skip_old_ports'
   spcr.c:(.init.text+0x560): undefined reference to `serial8250_skip_old_ports'

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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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