[tty:tty-testing 16/73] ERROR: "__serdev_device_driver_register" [drivers/gnss/gnss-mtk.ko] undefined!

[tty:tty-testing 16/73] ERROR: "__serdev_device_driver_register" [drivers/gnss/gnss-mtk.ko] undefined!

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
head:   a5420aa84c532497b61ef1a2d46ae4a09d675da3
commit: 54edb425346a4d5e17f7e54e8c97c0d0eac26315 [16/73] serdev: simplify Makefile
config: microblaze-randconfig-a001-20191217 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 54edb425346a4d5e17f7e54e8c97c0d0eac26315
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=microblaze 

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

All errors (new ones prefixed by >>):

>> ERROR: "__serdev_device_driver_register" [drivers/gnss/gnss-mtk.ko] undefined!
>> ERROR: "serdev_device_close" [drivers/gnss/gnss-serial.ko] undefined!
>> ERROR: "serdev_device_wait_until_sent" [drivers/gnss/gnss-serial.ko] undefined!
>> ERROR: "serdev_device_write" [drivers/gnss/gnss-serial.ko] undefined!
>> ERROR: "serdev_device_write_wakeup" [drivers/gnss/gnss-serial.ko] undefined!
>> ERROR: "serdev_device_open" [drivers/gnss/gnss-serial.ko] undefined!
>> ERROR: "serdev_device_set_flow_control" [drivers/gnss/gnss-serial.ko] undefined!
>> ERROR: "serdev_device_set_baudrate" [drivers/gnss/gnss-serial.ko] undefined!
>> ERROR: "serdev_device_write_wakeup" [drivers/mfd/rave-sp.ko] undefined!
>> ERROR: "__serdev_device_driver_register" [drivers/mfd/rave-sp.ko] undefined!
>> ERROR: "serdev_device_set_parity" [drivers/mfd/rave-sp.ko] undefined!
>> ERROR: "serdev_device_set_flow_control" [drivers/mfd/rave-sp.ko] undefined!
>> ERROR: "serdev_device_set_baudrate" [drivers/mfd/rave-sp.ko] undefined!
>> ERROR: "devm_serdev_device_open" [drivers/mfd/rave-sp.ko] undefined!
>> ERROR: "serdev_device_write" [drivers/mfd/rave-sp.ko] undefined!

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

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