ERROR: "min_low_pfn" undefined!

[kernel test robot]

Hi Jiri,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   64677779e8962c20b580b471790fe42367750599
commit: aebe5fc3b5685e1d9b86cc8314a8e8f3c6f3284e n_hdlc: put init/exit strings directly to prints
date:   4 months ago
config: microblaze-randconfig-c022-20200621 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

>> ERROR: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu_sink.ko] undefined!
>> ERROR: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined!
   ERROR: "min_low_pfn" [drivers/usb/core/usbcore.ko] undefined!
>> ERROR: "min_low_pfn" [crypto/essiv.ko] undefined!
>> ERROR: "min_low_pfn" [crypto/tcrypt.ko] undefined!
   ERROR: "min_low_pfn" [crypto/ccm.ko] undefined!
   ERROR: "min_low_pfn" [crypto/gcm.ko] undefined!
   ERROR: "min_low_pfn" [crypto/asymmetric_keys/asym_tpm.ko] undefined!

---
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Attachment: .config.gz
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