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-rw-r--r--tools/perf/util/unwind.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
index bfbdcc6198c9..8a44a1569a21 100644
--- a/tools/perf/util/unwind.h
+++ b/tools/perf/util/unwind.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __UNWIND_H
#define __UNWIND_H