elfcore.c:undefined reference to `dump_emit'

[kernel test robot <lkp@intel.com>]

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Hi Christoph,

It's probably a bug fix that unveils the link errors.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   df2fbf5bfa0e7fff8b4784507e4d68f200454318
commit: df41017eafd267c08acbfff99d34e4f96bbfbc92 ia64: remove support for machvecs
date:   10 months ago
:::::: branch date: 6 hours ago
:::::: commit date: 10 months ago
config: ia64-randconfig-r025-20200612 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout df41017eafd267c08acbfff99d34e4f96bbfbc92
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 

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

All errors (new ones prefixed by >>, old ones prefixed by <<):

ia64-linux-ld: arch/ia64/kernel/elfcore.o: in function `elf_core_write_extra_phdrs':
>> elfcore.c:(.text+0x192): undefined reference to `dump_emit'
ia64-linux-ld: arch/ia64/kernel/elfcore.o: in function `elf_core_write_extra_data':
elfcore.c:(.text+0x2f2): undefined reference to `dump_emit'

---
0-DAY CI Kernel Test Service, Intel Corporation
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