From: kernel test robot <redacted>
Sent: Tuesday, April 6, 2021 6:31 PM
...
Hi Dexuan, 
I love your patch! Perhaps something to improve:

All warnings (new ones prefixed by >>):

   drivers/pci/controller/pci-hyperv.c: In function 'hv_irq_unmask':
   drivers/pci/controller/pci-hyperv.c:1220:2: error: implicit declaration of
function 'hv_set_msi_entry_from_desc'
[-Werror=implicit-function-declaration]
    1220 |  hv_set_msi_entry_from_desc(&params->int_entry.msi_entry,
msi_desc);

This build error looks strange, because the patch doesn't even touch the driver
drivers/pci/controller/pci-hyperv.c.

I'll try to repro the build failure, and the other 2 failures in 2 separate
emails, and figure out what's happening.

PS, I tested building the patch in a fresh Ubuntu 20.04 VM and it was successful.

Thanks,
-- Dexuan