How to (re-)build UML kernel
=======================

1. Make sure you have devx and kernel source SFS handy, and loaded.
2. cd to kernel source /usr/src/linux-4.4.26
3. make clean; make mrproper # to clean everything
4. Copy the kernel config from /usr/lib64/uml, say 4.4.26-uml-config
   and rename it to .config, e.g
   cp /path/to/4.4.28-uml-config .config
5. export ARCH=um 
6. make oldconfig # apply old config
7. make menuconfig # optional - customise as needed
8. make vmlinux
9. If you wish, make modules - but you will need to know how to package them
   for use later.
