Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/tracefs.h b/include/linux/tracefs.h
index 5b727a1..88d279c 100644
--- a/include/linux/tracefs.h
+++ b/include/linux/tracefs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *  tracefs.h - a pseudo file system for activating tracing
  *
@@ -5,12 +6,7 @@
  *
  *  Copyright (C) 2014 Red Hat Inc, author: Steven Rostedt <srostedt@redhat.com>
  *
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License version
- *	2 as published by the Free Software Foundation.
- *
  * tracefs is the file system that is used by the tracing infrastructure.
- *
  */
 
 #ifndef _TRACEFS_H_