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-rw-r--r--include/linux/pid.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h
index 719582744a2e..dfd684ce0787 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PID_H
#define _LINUX_PID_H