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-rw-r--r--include/linux/ctype.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ctype.h b/include/linux/ctype.h
index 633c3862d8..ab9bf910d8 100644
--- a/include/linux/ctype.h
+++ b/include/linux/ctype.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
#ifndef _LINUX_CTYPE_H
#define _LINUX_CTYPE_H