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Date:   Mon, 3 Jun 2019 16:24:17 +0200
From:   Dominik Brodowski <linux@dominikbrodowski.net>
To:     "Enrico Weigelt, metux IT consult" <lkml@metux.net>
Cc:     Thomas Gleixner <tglx@linutronix.de>, linux-spdx@vger.kernel.org
Subject: Re: [Batch 16 patch 22/25] treewide: Replace GPLv2
 boilerplate/reference with SPDX - rule 247
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On Mon, Jun 03, 2019 at 02:11:44PM +0200, Enrico Weigelt, metux IT consult wrote:
> > --- a/tools/pcmcia/crc32hash.c
> > +++ b/tools/pcmcia/crc32hash.c
> > @@ -1,3 +1,4 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> >  /* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
> >  /* Usage example:
> >  $ ./crc32hash "Dual Speed"
> > 
> > 
> 
> Where exactly is that deduced from ?
> Can we really be sure that this is correct ?

The code originally got added in commit 5085cb26503a by the individual whom
your present interlocutor is in the habit of defining by means of the
perpendicular pronoun.[*]

It is derived, as stated in the previous first line of the file, from
lib/crc32.c in the Linux kernel source, which states:

 * This source code is licensed under the GNU General Public License,
 * Version 2.  See the file COPYING for more details.

So it is correct that tools/pcmcia/crc32hash.c is licensened under
GPL-2.0-only.

	Dominik


[*] Cf. Yes Minister, S3E3.