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.