On Sat, Nov 12, 2022 at 1:44 PM Robert Swindells <rjs@xxxxxxxxxx> wrote: > > Contributors to these files are: > > Noralf Trønnes <noralf@xxxxxxxxxxx> > Liu Zixian <liuzixian4@xxxxxxxxxx> > Dave Airlie <airlied@xxxxxxxxxx> > Thomas Zimmermann <tzimmermann@xxxxxxx> > Lucas De Marchi <lucas.demarchi@xxxxxxxxx> > Gerd Hoffmann <kraxel@xxxxxxxxxx> > Rob Herring <robh@xxxxxxxxxx> My contributions are related to the madvise functions. That's largely lifted or inspired from the MSM code which is GPL only. That in turn looks inspired from i915 which is MIT (though not much more than the comment): $ git grep 'Our goal here is to return as much of the memory' drivers/gpu/drm/drm_gem_shmem_helper.c: /* Our goal here is to return as much of the memory as drivers/gpu/drm/i915/gem/i915_gem_shmem.c: * Our goal here is to return as much of the memory as drivers/gpu/drm/msm/msm_gem.c: /* Our goal here is to return as much of the memory as I imagine this is not the only example in this file. In fact, looking at the introduction of this file, it looks like it originated from V3D code as that was the first driver to convert over. V3D is licensed GPL2+. Of course, its code was not written in a vacuum either and came from ??? This to me is a problem with the dual licensing in DRM drivers. Code moves around with little attention paid at the time to licensing. I wouldn't trust anything claiming MIT license is not GPL 'contaminated'. OTOH, there's really only one way for the madvise code to work, so maybe not a copyrightable work on its own. Rob
