I began using Coccinelle towards the end of the e2fsprogs 64bit
conversion and thought my scripts might be useful to share. I have
made no effort to clean them up and at best they did not cover all
cases, but they made life much easier for me. They might make a good
starting point for other people converting to new interfaces in
e2fsprogs.
You can get spatch/Coccinelle here:
http://www.emn.fr/x-info/coccinelle/#download
A brief tutorial is here:
http://lwn.net/Articles/315686/
-VAL