ERROR: "__sw_hweight8" [drivers/net/wireless/mediatek/mt76/mt7603/mt7603e.ko] undefined!

[kbuild test robot]

Hi Felix,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   12ad143e1b803e541e48b8ba40f550250259ecdd
commit: c8846e1015022d2531ac4c895783e400b3e5babe mt76: add driver for MT7603E and MT7628/7688
date:   13 days ago
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 8.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout c8846e1015022d2531ac4c895783e400b3e5babe
        # save the attached .config to linux build tree
        GCC_VERSION=8.2.0 make.cross ARCH=ia64 

All errors (new ones prefixed by >>):

   ERROR: "ia64_delay_loop" [drivers/spi/spi-thunderx.ko] undefined!
>> ERROR: "__sw_hweight8" [drivers/net/wireless/mediatek/mt76/mt7603/mt7603e.ko] undefined!
   ERROR: "ia64_delay_loop" [drivers/net/phy/mdio-cavium.ko] undefined!

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