linux-kernel - Re: [PATCH] input: pegasus_notetaker: add license information

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Date:   Sun, 26 Nov 2017 12:28:49 +0100
From:   Philippe Ombredanne <pombredanne@...b.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Martin Kepplinger <martink@...teo.de>,
        linux-input@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] input: pegasus_notetaker: add license information

Greg, Martin:

On Sun, Nov 26, 2017 at 9:59 AM, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
> On Sat, Nov 25, 2017 at 04:42:59PM -0800, Dmitry Torokhov wrote:
>> Hi Martin,
>>
>> On Sat, Nov 18, 2017 at 09:45:18AM +0100, Martin Kepplinger wrote:
>> > This adds an SPDX license identifier to this driver I wrote some time back.
>> >
>> > Signed-off-by: Martin Kepplinger <martink@...teo.de>
>> > ---
>> >  drivers/input/tablet/pegasus_notetaker.c | 1 +
>> >  1 file changed, 1 insertion(+)
>> >
>> > diff --git a/drivers/input/tablet/pegasus_notetaker.c b/drivers/input/tablet/pegasus_notetaker.c
>> > index 47de5a81172f..cdf75c989469 100644
>> > --- a/drivers/input/tablet/pegasus_notetaker.c
>> > +++ b/drivers/input/tablet/pegasus_notetaker.c
>> > @@ -1,3 +1,4 @@
>> > +// SPDX-License-Identifier: GPL-2.0
>>
>> Should this be GPL-2.0+? The MODULE_LICENSE specifies that the module is
>> "GPL" which in kernel land means GPLv2+. Or we should change the module
>> license to strict "GPLv2"?
>
> That is up to Martin, given that he is the author, as to what he wants
> to mark this as.  Odd that it missed the big "fix up all files with no
> license information" sweep.
>
> Philippe, how did we miss this one?

It was not missed but instead was set aside by design.
drivers/input/tablet/pegasus_notetaker.c does not have (or rather did
not have until now) any licensing information beside a
MODULE_LICENSE("GPL") and these were left aside as requiring some
extra review and the eventual need of a clarification by the author,
just as Martin is rightfully doing so just now.

>> Doing this would prevent mismatches between license notices, SPDX tags
>> and MODULE_LCENSE() strings, which happen very often.
>
> I agree, but now that we are getting SPDX tags, we can fix up all of the
> mismatches in MODULE_LICENSE() strings, of which there are a lot.

I said that I would take a stab at it... but I did not attack this yet:
Let me get over the ThanksGiving hangover and provide a list this
week. I guess there could be three lists in fact:

- modules with only a MODULE_LICENSE and no other license info: these
could be candidates for adding an SPDX id matching the MODULE_LICENSE

- modules updated to use an SPDX id and with a conflicting
MODULE_LICENSE: the MODULE_LICENSE should be aligned to match the SPDX
id

- modules not yet updated to use an SPDX id and with a license notice
conflicting with the MODULE_LICENSE: the MODULE_LICENSE should be
aligned to match the licensing

I'll run a scancode-toolkit scan on the tip of Linus' tree and create
a CSV from that to surface these oddities.
Unless you prefer me to use another tree like on the USB side for a start.

-- 
Cordially
Philippe Ombredanne, the wild licenses tamer