linux-kernel - Re: [PATCH v3 00/12] cros_ec: Match licenses and switch to SPDX identifier.

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Date:   Fri, 8 Jun 2018 10:58:31 +0200
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     Joe Perches <joe@...ches.com>, linux-kernel@...r.kernel.org
Cc:     Gwendal Grignou <gwendal@...omium.org>, kernel@...labora.com,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Tony Luck <tony.luck@...el.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Paolo Cretaro <paolocretaro@...il.com>,
        linux-iio@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-i2c@...r.kernel.org, Olof Johansson <olof@...om.net>,
        linux-rtc@...r.kernel.org, Anton Vorontsov <anton@...msg.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Benson Leung <bleung@...omium.org>,
        linux-input@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>,
        Jonathan Cameron <jic23@...nel.org>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Lee Jones <lee.jones@...aro.org>,
        Hartmut Knaack <knaack.h@....de>,
        Colin Cross <ccross@...roid.com>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH v3 00/12] cros_ec: Match licenses and switch to SPDX
 identifier.

Hi Joe,

On 06/06/18 17:42, Joe Perches wrote:
> On Wed, 2018-06-06 at 17:08 +0200, Enric Balletbo i Serra wrote:
>> Dear all,
>>
>> This patchset is just to adopt the SPDX license identifier for all
>> ChromeOS Embedded Controller related drivers.
> 
> This bit is fine,
> 
>>  The patches touches
>> different subsystems but every patch can be picked from their respective
>> maintainer independently.
>>
>> This third version takes the license note as the valid license (I did
>> the contrary in the second version) so apart from add the SPDX tags it
>> also introduces new patches to match the license.
> 
> But why change any MODULE_LICENSE text?
> 

Because in some cases there is a mismatch between the license note and the
MODULE_LICENSE text.

According to the documentation setting MODULE_LICENSE("GPL") means GNU Public
License v2 or later [1], in the cases where the license note tells explicitly
that is GPL v2 only I think that the MODULE_LICENSE should match and be changed
to "GPL v2".

[1] https://elixir.bootlin.com/linux/v4.17/source/include/linux/module.h#L172

> There are uses of MODULE_LICENSE("GPL") where
> the SPDX license identifier is some GPL variant
> 

Right, but I suppose in such cases is wrong and should be changed too?

> For instance:
> $ git grep -P --name-only
> 'MODULE_LICENSE\s*\("GPL"\s*\)\s*;'| \
>   xargs grep "SPDX-License-
> Identifier:" | \
>   cut -f3- -d: | \
>   sed -r 's@\s*\*/\s*$@@' | \
>   sort |
> uniq -c | sort -rn
>     551  GPL-2.0+
>     281  GPL-2.0
>      13  GPL-1.0+
>     
>   9  GPL-2.0-only
>       2  GPL-2.0 OR MIT
>       1  (GPL-2.0 OR MPL-1.1)
>    
>    1  (GPL-2.0+ OR BSD-3-Clause)
>       1  (GPL-2.0 OR BSD-3-Clause)
> 
> And if you were to do this, please do it tree-wide,
> and ideally via a script
>