[tuna74]

If you port drivers from Linux those drivers would have to be GPLv2-licensed.

[kvdveer]

That needn't be a problem, assuming the linking-clause of the GPL2 doesn't extend to device drivers. Gpl2 doesn't extend to userspace processes linking into the kernel, so maybe?

[qalmakka]

Yeah but unless the drivers run like microkernel services in a separate userspace, the GPL applies to anything you link into your kernel