Hi Arnd,

I love your patch! Yet something to improve:

[auto build test ERROR on wireless-drivers-next/master]
[also build test ERROR on next-20180926]
[cannot apply to v4.19-rc5]
[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/Arnd-Bergmann/mt76-fix-building-without-CONFIG_MT76x0U/20180927-101346
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next.git master
config: i386-allmodconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

>> ERROR: "mt76x0_tx_prepare_skb" [drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0u.ko] undefined!
>> ERROR: "mt76x0_cleanup" [drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0u.ko] undefined!

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0-DAY kernel test infrastructure                Open Source Technology Center
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