Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/security/apparmor/include/lib.h b/security/apparmor/include/lib.h
index 6505e1a..7d27db7 100644
--- a/security/apparmor/include/lib.h
+++ b/security/apparmor/include/lib.h
@@ -1,14 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * AppArmor security module
  *
  * This file contains AppArmor lib definitions
  *
  * 2017 Canonical Ltd.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
  */
 
 #ifndef __AA_LIB_H
@@ -16,6 +12,7 @@
 
 #include <linux/slab.h>
 #include <linux/fs.h>
+#include <linux/lsm_hooks.h>
 
 #include "match.h"
 
@@ -55,6 +52,9 @@
 			     size_t *ns_len);
 void aa_info_message(const char *str);
 
+/* Security blob offsets */
+extern struct lsm_blob_sizes apparmor_blob_sizes;
+
 /**
  * aa_strneq - compare null terminated @str to a non null terminated substring
  * @str: a null terminated string