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-rw-r--r--arch/s390/include/asm/serial.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/serial.h b/arch/s390/include/asm/serial.h
index 5b3e48ef534b..aaf85a69061c 100644
--- a/arch/s390/include/asm/serial.h
+++ b/arch/s390/include/asm/serial.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_SERIAL_H
#define _ASM_S390_SERIAL_H