Hi,
here's a patch which adds explicit license headers to all files in src/device in LinuxBIOSv2.
Files originally written by Eric Biederman (CC'd) are copyright Linux Networx, and are licensed under the GPLv2 (confirmed by Eric in private mail).
There's one file which was written by Li-Ta Lo and one by Yhlu. For simplicity I put them in as GPLv2, too (but if you prefer "GPLv2 or later" we can use that as well -- just let us know).
My understanding is that if in doubt whether to use "GPLv2" or "GPLv2 or later" we can always safely assume GPLv2. That's because even _if_ the file was "GPLv2 or later" we could always just use it under the GPLv2. The text says "GPLv2 _or_ later" and we simply choose the GPLv2 only.
Anyway, please complain if I got something wrong in the patches, or if an of the authors prefer "GPLv2 or later" over "GPLv2" (or vice versa).
Thanks, Uwe.