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-rw-r--r--src/include/smp/atomic.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/include/smp/atomic.h b/src/include/smp/atomic.h
index 5e78ae4462..18f83de52b 100644
--- a/src/include/smp/atomic.h
+++ b/src/include/smp/atomic.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
#ifndef SMP_ATOMIC_H
#define SMP_ATOMIC_H