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-rw-r--r--tools/perf/util/pstack.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/pstack.h b/tools/perf/util/pstack.h
index ded7f2e36624..8729b8be061d 100644
--- a/tools/perf/util/pstack.h
+++ b/tools/perf/util/pstack.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _PERF_PSTACK_
#define _PERF_PSTACK_