[patch 9/9] vfio/pci: Cleanup license mess

[Thomas Gleixner]

The recently added nvlink2 VFIO driver introduced a license conflict in two
files. In both cases the SPDX license identifier is:

  SPDX-License-Identifier: GPL-2.0+

but the files contain also the following license boiler plate text:

  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation

The latter is GPL-2.9-only and not GPL-2.0=.

Looking deeper. The nvlink source file is derived from vfio_pci_igd.c which
is also licensed under GPL-2.0-only and it can be assumed that the file was
copied and modified. As the original file is licensed GPL-2.0-only it's not
possible to relicense derivative work to GPL-2.0-or-later.

Fix the SPDX identifier and remove the boiler plate as it is redundant.

Fixes: 7f92891778df ("vfio_pci: Add NVIDIA GV100GL [Tesla V100 SXM2] subdriver")
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Alexey Kardashevskiy <aik@xxxxxxxxx>
Cc: Alex Williamson <alex.williamson@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: kvm@xxxxxxxxxxxxxxx
---

P.S.: This patch is part of a larger cleanup, but independent of other
      patches and is intended to be picked up by the maintainer directly.

---
 drivers/vfio/pci/trace.h            |    6 +-----
 drivers/vfio/pci/vfio_pci_nvlink2.c |    6 +-----
 2 files changed, 2 insertions(+), 10 deletions(-)

--- a/drivers/vfio/pci/trace.h
+++ b/drivers/vfio/pci/trace.h
@@ -1,13 +1,9 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * VFIO PCI mmap/mmap_fault tracepoints
  *
  * Copyright (C) 2018 IBM Corp.  All rights reserved.
  *     Author: Alexey Kardashevskiy <aik@xxxxxxxxx>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #undef TRACE_SYSTEM
--- a/drivers/vfio/pci/vfio_pci_nvlink2.c
+++ b/drivers/vfio/pci/vfio_pci_nvlink2.c
@@ -1,14 +1,10 @@
-// SPDX-License-Identifier: GPL-2.0+
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * VFIO PCI NVIDIA Whitherspoon GPU support a.k.a. NVLink2.
  *
  * Copyright (C) 2018 IBM Corp.  All rights reserved.
  *     Author: Alexey Kardashevskiy <aik@xxxxxxxxx>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Register an on-GPU RAM region for cacheable access.
  *
  * Derived from original vfio_pci_igd.c: