[patch 1/3] perf/core: Convert to SPDX license identifiers

[Thomas Gleixner]

Use proper SPDX license identifiers instead of the bogus reference to
kernel-base/COPYING.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
---
 kernel/events/callchain.c   |    3 +--
 kernel/events/core.c        |    3 +--
 kernel/events/ring_buffer.c |    3 +--
 3 files changed, 3 insertions(+), 6 deletions(-)

--- a/kernel/events/callchain.c
+++ b/kernel/events/callchain.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Performance events callchain code, extracted from core.c:
  *
@@ -5,8 +6,6 @@
  *  Copyright (C) 2008-2011 Red Hat, Inc., Ingo Molnar
  *  Copyright (C) 2008-2011 Red Hat, Inc., Peter Zijlstra
  *  Copyright  Â  2009 Paul Mackerras, IBM Corp. <paulus@xxxxxxxxxxx>
- *
- * For licensing details see kernel-base/COPYING
  */
 
 #include <linux/perf_event.h>
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Performance events core code:
  *
@@ -5,8 +6,6 @@
  *  Copyright (C) 2008-2011 Red Hat, Inc., Ingo Molnar
  *  Copyright (C) 2008-2011 Red Hat, Inc., Peter Zijlstra
  *  Copyright  Â  2009 Paul Mackerras, IBM Corp. <paulus@xxxxxxxxxxx>
- *
- * For licensing details see kernel-base/COPYING
  */
 
 #include <linux/fs.h>
--- a/kernel/events/ring_buffer.c
+++ b/kernel/events/ring_buffer.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Performance events ring-buffer code:
  *
@@ -5,8 +6,6 @@
  *  Copyright (C) 2008-2011 Red Hat, Inc., Ingo Molnar
  *  Copyright (C) 2008-2011 Red Hat, Inc., Peter Zijlstra
  *  Copyright  Â  2009 Paul Mackerras, IBM Corp. <paulus@xxxxxxxxxxx>
- *
- * For licensing details see kernel-base/COPYING
  */
 
 #include <linux/perf_event.h>