Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/security/tomoyo/mount.c b/security/tomoyo/mount.c
index 807fd91..2755971 100644
--- a/security/tomoyo/mount.c
+++ b/security/tomoyo/mount.c
@@ -6,6 +6,7 @@
  */
 
 #include <linux/slab.h>
+#include <uapi/linux/mount.h>
 #include "common.h"
 
 /* String table for special mount operations. */
@@ -48,6 +49,7 @@
 {
 	const struct tomoyo_mount_acl *acl =
 		container_of(ptr, typeof(*acl), head);
+
 	return tomoyo_compare_number_union(r->param.mount.flags,
 					   &acl->flags) &&
 		tomoyo_compare_name_union(r->param.mount.type,
@@ -88,6 +90,7 @@
 	struct tomoyo_path_info rdir;
 	int need_dev = 0;
 	int error = -ENOMEM;
+
 	r->obj = &obj;
 
 	/* Get fstype. */