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-rw-r--r--tools/include/linux/rcu.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/include/linux/rcu.h b/tools/include/linux/rcu.h
index 5080649dad04..7d02527e5bce 100644
--- a/tools/include/linux/rcu.h
+++ b/tools/include/linux/rcu.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LIBLOCKDEP_RCU_H_
#define _LIBLOCKDEP_RCU_H_