On 09/06/2023 10:38 am, Jan Beulich wrote: > On 09.06.2023 11:29, Andrew Cooper wrote: >> On 09/06/2023 10:22 am, Jan Beulich wrote: >>>> --- /dev/null >>>> +++ b/xen/arch/ppc/boot_of.c >>>> @@ -0,0 +1,122 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0-or-later */ >>> By default we mean to use ... >>> >>>> --- /dev/null >>>> +++ b/xen/arch/ppc/early_printk.c >>>> @@ -0,0 +1,36 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>> ... the more modern form of this (GPL-2.0-only). Anything deviating from >>> that may want justifying in the description. >> GPL-2.0-or-later is fine. > Hmm, I was merely following > https://lists.xen.org/archives/html/xen-devel/2023-06/msg00415.html. > The text at the top of ./COPYING looks to suggest -only, and I'm > unaware of any other place where our default is actually written down.
The license is chosen by the submitter/copyright holder, based on their preferences/wishes. It's fine for Xen to say "if you've got no vested interest, we recommend GPL-2.0-only", but that is strictly a recommendation and no more. If the submitter chooses GPL-2.0-or-later, that is their prerogative. We have plenty of GPL-2.0-or-later code in Xen. ~Andrew
