[powerpc:test 45/76] undefined reference to `.elf64_apply_relocate_add'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git test
head:   f616ddd0503c863e05be4a9d16b3c3ef8f85213f
commit: 90cf23bbbc9ef5d9da798c1b0caceb0ebc583b5f [45/76] powerpc: Factor out relocation code from module_64.c to elf_util_64.c.
config: powerpc-ppc64e_defconfig (attached as .config)
compiler: powerpc64-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
        git checkout 90cf23bbbc9ef5d9da798c1b0caceb0ebc583b5f
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/built-in.o: In function `.apply_relocate_add':

quoted

(.text+0x18828): undefined reference to `.elf64_apply_relocate_add'

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