Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/Documentation/admin-guide/LSM/Smack.rst b/Documentation/admin-guide/LSM/Smack.rst
index 6a5826a..6d44f4f 100644
--- a/Documentation/admin-guide/LSM/Smack.rst
+++ b/Documentation/admin-guide/LSM/Smack.rst
@@ -818,6 +818,10 @@
 	specifies a label to which all labels set on the
 	filesystem must have read access. Not yet enforced.
 
+  smackfstransmute=label:
+	behaves exactly like smackfsroot except that it also
+	sets the transmute flag on the root of the mount
+
 These mount options apply to all file system types.
 
 Smack auditing