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-rw-r--r--tools/perf/builtin-diff.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 0cd4cf6a344b..56223bdfa205 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* builtin-diff.c
*
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