Re: [PATCH v6] checkpatch.pl: Add SPDX license tag check

[Joe Perches <joe@perches.com>]

On Fri, 2018-02-02 at 12:27 -0600, Rob Herring wrote:
> On Fri, Feb 2, 2018 at 9:49 AM, Igor Stoppa <igor.stoppa@huawei.com> wrote:
> > On 02/02/18 17:40, Rob Herring wrote:
> > > Add SPDX license tag check based on the rules defined in
> > 
> > Shouldn't it also check that the license is compatible?
> > 
> 
> Perhaps we shouldn't try to script legal advice.

True.

I believe what was meant was that the
entry was a valid SPDX License entry
that already exists as a specific file
in the LICENSES/ path.

So that entry must be some combination of:

$ git ls-files LICENSES/ | cut -f3- -d'/' | sort
BSD-2-Clause
BSD-3-Clause
BSD-3-Clause-Clear
GPL-1.0
GPL-2.0
LGPL-2.0
LGPL-2.1
Linux-syscall-note
MIT
MPL-1.1

>From my perspective, it'd be better if the
various + uses had their own individual
license files in the LICENSES/ path.

Right now, there are many missing licenses
that are already used by various existing
SPDX-License-Identifier: entries.


APACHE-2.0
BSD
CDDL
CDDL-1.0
ISC
GPL-1.0+
GPL-2.0+
LGPL-2.1+
OpenSSL

There are odd entries like:

GPL-2.0-only

Parentheses around AND/OR aren't consistent.