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-rw-r--r--include/linux/percpu-refcount.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h
index c13dceb87b60..6658d9ee5257 100644
--- a/include/linux/percpu-refcount.h
+++ b/include/linux/percpu-refcount.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Percpu refcounts:
* (C) 2012 Google, Inc.