linux-kernel - Re: [PATCH v2 08/10] drivers: watchdog: Replace GPL license notice with SPDX identifier

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Message-ID: <511814a0-0c42-4813-9473-13748d6c6cb0@roeck-us.net>
Date:   Sun, 14 May 2023 06:08:29 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Richard Fontana <rfontana@...hat.com>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        Linux SPDX Licenses <linux-spdx@...r.kernel.org>,
        Linux DRI Development <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Networking <netdev@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Staging Drivers <linux-staging@...ts.linux.dev>,
        Linux Watchdog Devices <linux-watchdog@...r.kernel.org>,
        Linux Kernel Actions <linux-actions@...ts.infradead.org>,
        Diederik de Haas <didi.debian@...ow.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        David Airlie <airlied@...hat.com>,
        Karsten Keil <isdn@...ux-pingi.de>,
        Jay Vosburgh <j.vosburgh@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Sam Creasey <sammy@...my.net>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Jan Kara <jack@...e.com>,
        Andreas Färber <afaerber@...e.de>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Ray Lehtiniemi <rayl@...l.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Andrey Panin <pazke@...pac.ru>, Oleg Drokin <green@...mea.edu>,
        Marc Zyngier <maz@...nel.org>,
        Jonas Jensen <jonas.jensen@...il.com>,
        Sylver Bruneau <sylver.bruneau@...glemail.com>,
        Andrew Sharp <andy.sharp@....com>,
        Denis Turischev <denis@...pulab.co.il>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Alan Cox <alan@...ux.intel.com>,
        Simon Horman <simon.horman@...igine.com>
Subject: Re: [PATCH v2 08/10] drivers: watchdog: Replace GPL license notice
 with SPDX identifier

On Sun, May 14, 2023 at 12:07:28AM +0900, Greg Kroah-Hartman wrote:
> On Sat, May 13, 2023 at 09:43:39AM -0400, Richard Fontana wrote:
> > On Sat, May 13, 2023 at 6:53 AM Bagas Sanjaya <bagasdotme@...il.com> wrote:
> > >
> > > On 5/12/23 19:46, Richard Fontana wrote:
> > > > On Fri, May 12, 2023 at 6:07 AM Bagas Sanjaya <bagasdotme@...il.com> wrote:
> > > >
> > > >
> > > >> diff --git a/drivers/watchdog/sb_wdog.c b/drivers/watchdog/sb_wdog.c
> > > >> index 504be461f992a9..822bf8905bf3ce 100644
> > > >> --- a/drivers/watchdog/sb_wdog.c
> > > >> +++ b/drivers/watchdog/sb_wdog.c
> > > >> @@ -1,3 +1,4 @@
> > > >> +// SPDX-License-Identifier: GPL-1.0+
> > > >>  /*
> > > >>   * Watchdog driver for SiByte SB1 SoCs
> > > >>   *
> > > >> @@ -38,10 +39,6 @@
> > > >>   *     (c) Copyright 1996 Alan Cox <alan@...rguk.ukuu.org.uk>,
> > > >>   *                                             All Rights Reserved.
> > > >>   *
> > > >> - *     This program is free software; you can redistribute it and/or
> > > >> - *     modify it under the terms of the GNU General Public License
> > > >> - *     version 1 or 2 as published by the Free Software Foundation.
> > > >
> > > > Shouldn't this be
> > > > // SPDX-License-Identifier: GPL-1.0 OR GPL-2.0
> > > > (or in current SPDX notation GPL-1.0-only OR GPL-2.0-only) ?
> > > >
> > >
> > > Nope, as it will fail spdxcheck.py. Also, SPDX specification [1]
> > > doesn't have negation operator (NOT), thus the licensing requirement
> > > on the above notice can't be expressed reliably in SPDX here.
> > >
> > > [1]: https://spdx.github.io/spdx-spec/v2.3/SPDX-license-expressions/
> > 
> > The GPL identifiers in recent versions of SPDX include an `-only` and
> > an `-or-later` variant.
> 
> But Linux does not use the newer versions of SPDX given that we started
> the conversion before the "-only" variant came out.  Let's stick with
> the original one please before worrying about converting to a newer
> version of SPDX and mixing things up.
> 

Either case I'd prefer to have no conversion if there is no means
to express the original license (ie GPL-1.0 or GPL-2.0 and nothing else)
in acceptable SPDX form.

Thanks,
Guenter