Your editor/IDE settings for autocompletion and other easiness

(I was asked to research this topic to help students. So please ignore
this topic if all you want to say is that it is OK to code in editor
without autocompletion and any other integration, and that there's LXR
website. We all know that.)

Dear kernel developers,
if you have a minute, please share
- what's your configuration for editor integration with sources tree?
(the opposite is "just using any editor")
- which IDE/editor handiness options except autocompletion are
possible to obtain while developing kernel code, and which options do
you use?

If you don't use any special configuration, feel free not to reply.

Thanks!

-- 
Andrey Utkin