Hello,
[...]
> ERROR: modpost: missing MODULE_LICENSE() in drivers/pci/controller/pcie-mt7621.o
>
> Fix this by adding 'MODULE_LICENSE()' to the driver.
To add for posterity, should someone stumble upon this in the future. Lack
of MODULE_LICENSE() used to be a warning, but that has been changed quite
recently in the following commit:
commit 1d6cd3929360 ("modpost: turn missing MODULE_LICENSE() into error")
Krzysztof
