Stephen Rothwell [off-list ref] writes:

quoted

It's not ok to submit under e.g. GPL v3 only, I'd suggest "under GPL v2
and optionally other licence(s)" or something like that.

Or maybe "under a license compatible with the Linux kernel source".

Right, it looks better. Now I think the author doesn't even have to
licence under GPLv2, e.g. BSD alone will do as well.
-- 
Krzysztof Halasa