linux-kernel - Re: Moving Userspace RCU (urcu) from GPL to LGPL license

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Date:	Wed, 18 Feb 2009 16:44:26 -0500
From:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, ltt-dev@...ts.casi.polymtl.ca,
	pierre-marc.fournier@...ymtl.ca
Subject: Re: Moving Userspace RCU (urcu) from GPL to LGPL license

* Alan Cox (alan@...rguk.ukuu.org.uk) wrote:
> On Wed, 18 Feb 2009 13:02:32 -0500
> Mathieu Desnoyers <compudj@...stal.dyndns.org> wrote:
> > only thing is that we cannot put GPL code into a LGPL library.
> 
> You'll need a patent grant from IBM for non GPL use for that not just an
> LGPL library
>  
> > The other point is that I use a few low-level primitives from the Linux
> > kernel header (e.g. atomic increment for x86, barrier macros). Those are
> > simple one-liners, but, still, I wonder about the licensing
> > implications. I could simply "rewrite" them, but that would be a shame
> 
> Ask the author - certainly the original basic atomic ops Linus gave
> specific permission to the mozilla folks to use under other licences.
> 
> Alan
> 

Thanks Alan for this precious information. I'll discuss with IBM about
possible alternatives.

Mathieu


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Mathieu Desnoyers
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