Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/Documentation/process/kernel-docs.rst b/Documentation/process/kernel-docs.rst
index 3fb28de..7a45a8e 100644
--- a/Documentation/process/kernel-docs.rst
+++ b/Documentation/process/kernel-docs.rst
@@ -95,18 +95,6 @@
         [...]. This paper examines some common problems for
         submitting larger changes and some strategies to avoid problems.
 
-    * Title: **Overview of the Virtual File System**
-
-      :Author: Richard Gooch.
-      :URL: http://www.mjmwired.net/kernel/Documentation/filesystems/vfs.txt
-      :Date: 2007
-      :Keywords: VFS, File System, mounting filesystems, opening files,
-        dentries, dcache.
-      :Description: Brief introduction to the Linux Virtual File System.
-        What is it, how it works, operations taken when opening a file or
-        mounting a file system and description of important data
-        structures explaining the purpose of each of their entries.
-
     * Title: **Linux Device Drivers, Third Edition**
 
       :Author: Jonathan Corbet, Alessandro Rubini, Greg Kroah-Hartman
@@ -565,7 +553,7 @@
 
     * Name: **Cross-Referencing Linux**
 
-      :URL: http://lxr.free-electrons.com/
+      :URL: https://elixir.bootlin.com/
       :Keywords: Browsing source code.
       :Description: Another web-based Linux kernel source code browser.
         Lots of cross references to variables and functions. You can see