On Sat, Jan 09, 2021 at 10:17:38AM +0100, Zhi Han wrote: > Thanks a lot for the .config file. > I also tested it, with mdio-bus.o in the Makefile, glad to got that there is > no problem of that, although I don't know the reason/trick yet.
I'm not 100% sure, but i think:
obj-$(CONFIG_MDIO_DEVICE) += mdio-bus.o
actually refers back to
mdio-bus-y += mdio_bus.o mdio_device.o
Andrew
