Maintainers how to update linux kernel

maintainers.md

@@ -1,5 +1,30 @@
 # Maintainers
 
+## How to update the Linux kernel?
+
+If you don't care about educational patches:
+
+    cd linux
+    git fetch
+    git checkout master
+
+If you do:
+
+    last_mainline_revision=v4.14
+    git rebase --onto master $last_mainline_revision
+
+Then rebuild the kernel:
+
+    ./build -t linux-reconfigure
+
+Now, all you kernel modules may break, although they are usually trivial breaks of things moving around headers or to sub-structs.
+
+The userland, however, should simply not break, as Linus enforces strict backwards compatibility of userland interfaces.
+
+This backwards compatibility is just awesome, it makes getting and running the latest master painless.
+
+This also makes this repo the perfect setup to develop the Linux kernel.
+
 ## How to add new Buildroot options?
 
     cd buildroot/output.x86_64~