linux-kernel - Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3

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Date:	Fri, 15 Jun 2007 17:44:40 -0300
From:	Alexandre Oliva <aoliva@...hat.com>
To:	Theodore Tso <tytso@....edu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Sean <seanlkml@...patico.ca>, Adrian Bunk <bunk@...sta.de>,
	Valdis.Kletnieks@...edu, Daniel Hazelton <dhazelton@...er.net>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, Greg KH <greg@...ah.com>,
	debian developer <debiandev@...il.com>, david@...g.hm,
	Tarkan Erimer <tarkan@...one.net.tr>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>, mingo@...e.hu
Subject: Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3

On Jun 15, 2007, Theodore Tso <tytso@....edu> wrote:

> On Thu, Jun 14, 2007 at 08:20:19PM -0300, Alexandre Oliva wrote:
>> 
>> So, you see, your statement above, about wanting to be able to use
>> other people's improvements, cannot be taken without qualification.

> No.  Linus and other Linux kernels might *want* to take other people's
> improvements, but thanks to Richard Stallman's choices for GPLv3, they
> can *not* legally take other people's improvements without violating
> the GPLv3 license.

This argument is backwards.  It's because of Linus' choice for GPLv2
that he can't take improvements under the GPLv3.

Had he chosen any other GPLv3-compatible license, he could.

And the same applies to any other incompatible pair of licenses.

-- 
Alexandre Oliva         http://www.lsd.ic.unicamp.br/~oliva/
FSF Latin America Board Member         http://www.fsfla.org/
Red Hat Compiler Engineer   aoliva@...dhat.com, gcc.gnu.org}
Free Software Evangelist  oliva@...d.ic.unicamp.br, gnu.org}
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