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-rw-r--r--tools/perf/ui/hist.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index db79017a6e56..706f6f1e9c7d 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#include <math.h>
#include <linux/compiler.h>