[driver-core:driver-core-testing 47/47] ERROR: "platform_get_irq_optional" [drivers/hwmon/pwm-fan.ko] undefined!

[kbuild test robot]

tree:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/gregkh/driver-core.git driver-core-testing
head:   6e7e5c7fbc1c84e4ac657e0cb5bf9ca24492cc8f
commit: 6e7e5c7fbc1c84e4ac657e0cb5bf9ca24492cc8f [47/47] hwmon: pwm-fan: Use platform_get_irq_optional()
config: i386-allmodconfig (attached as .config)
compiler: gcc-7 (Debian 7.4.0-11) 7.4.0
reproduce:
        git checkout 6e7e5c7fbc1c84e4ac657e0cb5bf9ca24492cc8f
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp at intel.com>

All errors (new ones prefixed by >>):

>> ERROR: "platform_get_irq_optional" [drivers/hwmon/pwm-fan.ko] undefined!

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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