On Wed, 27 Mar 2019 19:45:26 +0100
Greg Kroah-Hartman [off-list ref] wrote:

quoted

quoted

+// SPDX-License-Identifier: GPL-2.0  

According to last changes this should be GPL-2.0-only  

What "last changes"?  "GPL-2.0" is a totally valid SPDX identifier for
the kernel.  Don't buy into the "-only" prefix crud that the newer SPDX
version adopted for crazy reasons.  The in-kernel documentation lists
the valid identifiers and the version of SPDX we are currently using.

According to: LICENSES/preferred/GPL-2.0

SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
Usage-Guide:
  To use this license in source code, put one of the following SPDX
  tag/value pairs into a comment according to the placement
  guidelines in the licensing rules documentation.
  For 'GNU General Public License (GPL) version 2 only' use:
    SPDX-License-Identifier: GPL-2.0
  or
    SPDX-License-Identifier: GPL-2.0-only
  For 'GNU General Public License (GPL) version 2 or any later version' use:
    SPDX-License-Identifier: GPL-2.0+
  or
    SPDX-License-Identifier: GPL-2.0-or-later

So, GPL-2.0 is the same as GPL-2.0-only. Changing it from one to the
other doesn't make any difference.

-- Steve