[PATCH 4/5] powerpc/zImage: Rework serial driver probing

[kbuild test robot]

Hi Oliver,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v4.16-rc4]
[also build test ERROR on next-20180319]
[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/Oliver-O-Halloran/powerpc-zImage-Remove-ifdef-in-opal-c/20180320-023705
config: powerpc-ppc64_defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 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=powerpc 

All errors (new ones prefixed by >>):

>> arch/powerpc/boot/wrapper.a(serial.o):(.got2+0x1c): undefined reference to `_serial_drv_start'
>> arch/powerpc/boot/wrapper.a(serial.o):(.got2+0x24): undefined reference to `_serial_drv_end'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
-------------- next part --------------
A non-text attachment was scrubbed...
Name: .config.gz
Type: application/gzip
Size: 24150 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20180320/6cf79163/attachment-0001.gz>