Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756686AbXFODcN (ORCPT ); Thu, 14 Jun 2007 23:32:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752066AbXFODb7 (ORCPT ); Thu, 14 Jun 2007 23:31:59 -0400 Received: from 24-75-174-210-st.chvlva.adelphia.net ([24.75.174.210]:55509 "EHLO sanosuke.troilus.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751749AbXFODb6 (ORCPT ); Thu, 14 Jun 2007 23:31:58 -0400 To: Linus Torvalds Cc: Daniel Hazelton , Alexandre Oliva , Lennart Sorensen , Greg KH , debian developer , "david\@lang.hm" , Tarkan Erimer , linux-kernel@vger.kernel.org, Andrew Morton , mingo@elte.hu Subject: Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3 References: <200706142049.41819.dhazelton@enter.net> <87fy4u0xty.fsf@graviton.dyn.troilus.org> <200706142246.57583.dhazelton@enter.net> <878xal2a0q.fsf@graviton.dyn.troilus.org> From: Michael Poole Date: Thu, 14 Jun 2007 23:31:57 -0400 In-Reply-To: (Linus Torvalds's message of "Thu\, 14 Jun 2007 20\:22\:36 -0700 \(PDT\)") Message-ID: <874pl928r6.fsf@graviton.dyn.troilus.org> User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1254 Lines: 29 Linus Torvalds writes: > On Thu, 14 Jun 2007, Michael Poole wrote: >> >> If the DRM signature and program executable are coupled such that they >> are not useful when separated, the implication to me is that they form >> one work that is based on the original Program. This is beyond the >> GPL's permission for "mere aggregation". > > So you want to make things like a 160-bit SHA1 hash of a binary be a > "derived work" of that software? No. That is why I specified "not useful when separated". I also intentionally avoided the phrase "derived work": the legal definition of derived work is based on entirely different factors. If the signature is one that serves to indicate origin, to detect tampering, or the other things you mentioned, the program's binary is useful when separated from the signature. My objection arises when a functionally equivalent binary -- including advertised functions such as "runs on platform XYZ" -- cannot be produced from the distributed source code. Michael Poole - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/