linux-kernel - Re: [PATCH] media: v4l2-core: v4l2-mc: Add SPDX license identifier

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Date:   Thu, 11 Jan 2018 23:33:14 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Shuah Khan <shuahkh@....samsung.com>
Cc:     mchehab@...nel.org, shuah@...nel.org, sakari.ailus@...ux.intel.com,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: v4l2-core: v4l2-mc: Add SPDX license identifier

Hi Shuah,

On Thursday, 11 January 2018 22:44:08 EET Shuah Khan wrote:
> On 01/11/2018 11:42 AM, Laurent Pinchart wrote:
> > On Thursday, 11 January 2018 17:45:15 EET Shuah Khan wrote:
> >> On 01/11/2018 05:55 AM, Laurent Pinchart wrote:
> >>> On Wednesday, 10 January 2018 18:35:36 EET Shuah Khan wrote:
> >>>> Replace GPL license statement with SPDX GPL-2.0 license identifier.
> >>>> 
> >>>> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
> >>>> ---
> >>>> 
> >>>>  drivers/media/v4l2-core/v4l2-mc.c | 11 +----------
> >>>>  1 file changed, 1 insertion(+), 10 deletions(-)
> >>>> 
> >>>> diff --git a/drivers/media/v4l2-core/v4l2-mc.c
> >>>> b/drivers/media/v4l2-core/v4l2-mc.c index 303980b71aae..1297132acd4e
> >>>> 100644
> >>>> --- a/drivers/media/v4l2-core/v4l2-mc.c
> >>>> +++ b/drivers/media/v4l2-core/v4l2-mc.c
> >>>> @@ -1,3 +1,4 @@
> >>>> +/* SPDX-License-Identifier: GPL-2.0 */
> >>> 
> >>> The header doesn't match the existing license.
> >> 
> >> When I added the file, I must have cut and pasted the license statement
> >> from another file. More on this below the deleted license lines.
> >> 
> >>> Furthermore, unless I'm mistaken, the standard comment style for SPDX
> >>> headers in the kernel is //, not /* ... */
> >> 
> >> Looks like we have 3 conventions for SPDX comment style.
> >> /* ... */ for headers and # ... for shell scripts and
> >> // for .c files.
> >> 
> >> I can update it it and send v2 provided we think the change is inline
> >> with the original license.
> > 
> > Personally I prefer the /* ... */ comment style, but I noticed that Greg
> > used // in his large patch the adds SPDX license headers, so I think we
> > should follow the established practice. I'll let you investigate to find
> > what is preferred :)
> 
> Yeah /*...*/ is my preferred as well. Hence  the autopilot change I made
> in the first place. I redid a couple of patches already to follow the
> // convention and I can do the same here.
> 
> >>>>  /*
> >>>>  
> >>>>   * Media Controller ancillary functions
> >>>>   *
> >>>> 
> >>>> @@ -5,16 +6,6 @@
> >>>> 
> >>>>   * Copyright (C) 2016 Shuah Khan <shuahkh@....samsung.com>
> >>>>   * Copyright (C) 2006-2010 Nokia Corporation
> >>>>   * Copyright (c) 2016 Intel Corporation.
> >>>> 
> >>>> - *
> >>>> - *  This program 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; either version 2 of the License, or
> >>>> - *  (at your option) any later version.
> >> 
> >> Are you concerned about the "or (at your option) any later version." part
> >> that it doesn't match?
> > 
> > Yes, that's my concern. I'm personally fine with GPL-2.0-only, but you'll
> > have a hard time contacting all the other copyright holders if you want
> > to relicense this. Good luck getting hold of the appropriate legal
> > department at Nokia :-)
> 
> Yeah. I don't think it is beneficial to continue this effort. I am going to
> not pursue the patch at this file. Thanks for the review.

How about just using

// SPDX-License-Identifier: GPL-2.0-or-later

? That is equivalent to the current license text.

-- 
Regards,

Laurent Pinchart