treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499

Based on 1 normalized pattern(s):

  this work is licensed under the terms of the gnu gpl version 2 see
  the copying file in the top level directory

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 35 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.797835076@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index 3b30301..ae0b8b5 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  fs/userfaultfd.c
  *
@@ -5,9 +6,6 @@
  *  Copyright (C) 2008-2009 Red Hat, Inc.
  *  Copyright (C) 2015  Red Hat, Inc.
  *
- *  This work is licensed under the terms of the GNU GPL, version 2. See
- *  the COPYING file in the top-level directory.
- *
  *  Some part derived from fs/eventfd.c (anon inode setup) and
  *  mm/ksm.c (mm hashing).
  */