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-rw-r--r--tools/perf/util/sort.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 507d096aee4e..f5901c10a563 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_SORT_H
#define __PERF_SORT_H
#include "../builtin.h"