ERROR: "ia64_delay_loop" [drivers/spi/spi-thunderx.ko] undefined!

[kbuild test robot]

Hi Guenter,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   fe7a719b30dfdb4d55680461954b99b257ebe671
commit: 2eee74b7e2a496dea49847c36fd09320505f45b7 NFC: nxp-nci: Include unaligned.h instead of access_ok.h
date:   5 weeks ago
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 2eee74b7e2a496dea49847c36fd09320505f45b7
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

All errors (new ones prefixed by >>):

>> ERROR: "ia64_delay_loop" [drivers/spi/spi-thunderx.ko] undefined!
>> ERROR: "ia64_delay_loop" [drivers/net/phy/mdio-cavium.ko] undefined!

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