Re: [Xen-devel] Re: Licensing conflict with OpenAFS kernel module

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 26 Apr 2006, at 16:51, Sidney Cammeresi wrote:

> > I'd suggest bringing this up within the OpenAFS community.  If they 
> > are
> > making direct use of Xen-specific functions, then they can potentially
> > find a work around.
> >
> > If we've made it so that a non-GPL symbol depends on one of our GPL'd
> > symbols, then that may be a problem on our part.  I don't know whether
> > this is an acceptable thing to do.  Sounds like an issue that needs to
> > be discussed on LKML.
> These functions do not appear in the OpenAFS source code, so the latter
> possibility seems more likely.  I made some cursory examinations of the
> source trees, but not knowing a lot about either, I didn't find 
> anything.
> If there's something I can do to help (like sending over my compiled
> kernel module), let me know.
Those symbols are used by some extremely primitive and ubiquitous 
kernel macros (e.g., local_irq_enable(), local_irq_restore(), pagetable 
macros, page_to_phys(), ...).
I think the obvious course of action is to make those two 
EXPORT_SYMBOL() and add a comment to explain why. There's not exactly a 
lot of GPL'ed goodness hidden behind them!
 -- Keir


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