Em Fri, 19 Jun 2020 16:41:14 -0400
Steven Rostedt [off-list ref] escreveu:

On Fri, 19 Jun 2020 14:13:29 -0600
Jonathan Corbet [off-list ref] wrote:

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On Mon, 15 Jun 2020 08:50:23 +0200
Mauro Carvalho Chehab [off-list ref] wrote:

[CC += Steve]  

Thanks.

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- Just like some media documents, this file is dual licensed
  with GPL and GFDL. As right now the GFDL SPDX definition is
  bogus (as it doesn't tell anything about invariant parts),
  let's not use SPDX here. Let's use, instead, the same test
  as we have on media.    

The dual-licensing really can't be expressed with an SPDX tag?  Because...  

A SPDX dual license should be possible, as it's used for GPL and BSD in
several locations.

Until one week ago, this was not possible, because SPDX headers
were broken for GFDL:

	https://github.com/spdx/license-list-XML/issues/686
	https://github.com/spdx/license-list-XML/issues/970

There are 2 types of GFDL licenses:
	- a Free license where the entire document allows
	  reviewing/changing;
	- a non-free variant, were some parts of the document
	  have a non-free license, where only the author can
	  change (called invariant parts).

Basically, some distro policies don't allow shipping documents
under the non-free version of GFDL.

The SPDX spec (up to version 3.9) doesn't allow differentiating
between them.

-

There's now an upstream patch (at SPDX) to be merged on the upcoming
versin 3.10 that will allow us to finally get rid of those:

	https://github.com/spdx/license-list-XML/pull/1048/commits/f695d2ac65230d0f4161ba58fff2f9d87bb5a053#diff-b948674e5c5cf6341e44e76b2565e80c

The GFDL-1.2 with no invariant sections is defined as:

	<SPDXLicenseCollection xmlns="http://www.spdx.org/license">
	  <license licenseId="GFDL-1.2-only-no-invariants" isOsiApproved="false"
	  name="GNU Free Documentation License v1.2 only - no invariants">
	    <crossRefs>
	      <crossRef>https://www.gnu.org/licenses/old-licenses/fdl-1.2.txt</crossRef>
	    </crossRefs>
	    <standardLicenseHeader>
	      Copyright (c) <alt name="copyright" match=".+">YEAR YOUR NAME</alt>.
	      Permission is granted to copy, distribute and/or modify this
	      document under the terms of the GNU Free Documentation License,
	      Version 1.2; with no Invariant Sections, no Front-Cover Texts,
	      and no Back-Cover Texts. A copy of the license is included
	      in the section entitled "GNU Free Documentation License".
	    </standardLicenseHeader>
	    <notes>
	      This license was released November 2002. The identifier 
	      GFDL-1.2-only-no-invariants should only be used when there are 
	      no Invariant Sections, Front-Cover Texts or Back-Cover Texts. 
	      See GFDL-1.2-only and GFDL-1.2-only-invariants for alternatives.
	    </notes>

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[...]
  

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+.. This file is dual-licensed: you can use it either under the terms
+.. of the GPL 2.0 or the GFDL 1.2+ license, at your option. Note that this  

And I never said GFDL 1.2+

Ah, right. I'll fix it.

 Copyright 2009 Red Hat Inc.                                                                                                                                                                  
-   Author:   Steven Rostedt [off-list ref]                                                                                                                                            
-  License:   The GNU Free Documentation License, Version 1.2                                                                                                                                 
-               (dual licensed under the GPL v2)                                                                                                                                              
-Reviewers:   Mathieu Desnoyers, Huang Ying, Hidetoshi Seto,

There is no "+" sign here.

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+.. dual licensing only applies to this file, and not this project as a
+.. whole.
+..
+.. a) This file is free software; you can redistribute it and/or
+..    modify it under the terms of the GNU General Public License as
+..    published by the Free Software Foundation version 2 of
+..    the License.
+..
+..    This file is distributed in the hope that it will be useful,
+..    but WITHOUT ANY WARRANTY; without even the implied warranty of
+..    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+..    GNU General Public License for more details.
+..
+.. Or, alternatively,
+..
+.. b) Permission is granted to copy, distribute and/or modify this
+..    document under the terms of the GNU Free Documentation License,
+..    Version 1.1 or any later version published by the Free Software
+..    Foundation, with no Invariant Sections, no Front-Cover Texts
+..    and no Back-Cover Texts. A copy of the license is available at
+..    https://www.gnu.org/licenses/old-licenses/fdl-1.2.html
+..
+.. TODO: replace it to GPL-2.0 OR GFDL-1.2-or-later WITH no-invariant-sections    

  "GPL-2.0 OR GFDL-1.2"

It should actually be:

	"GPL-2.0 OR GFDL-1.2-only-no-invariants"

Thanks,
Mauro