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-rw-r--r--sys/kern/kern_synch.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index 52c3b891df78..94ca92380946 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@@ -1,4 +1,6 @@
/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
* Copyright (c) 1982, 1986, 1990, 1991, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.