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-rw-r--r--tools/testing/radix-tree/test.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/radix-tree/test.c b/tools/testing/radix-tree/test.c
index 1a257d738a1e..5978ab1f403d 100644
--- a/tools/testing/radix-tree/test.c
+++ b/tools/testing/radix-tree/test.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>