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-rw-r--r--tools/build/feature/test-sync-compare-and-swap.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/build/feature/test-sync-compare-and-swap.c b/tools/build/feature/test-sync-compare-and-swap.c
index c34d4ca4af56..1e38d1930a97 100644
--- a/tools/build/feature/test-sync-compare-and-swap.c
+++ b/tools/build/feature/test-sync-compare-and-swap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stdint.h>
volatile uint64_t x;