<p>I am working on a project using rails 2.1.1.  With the new release of 2.2.2 I want to migrate to the new version.  Is there anything I need to change to migrate my 2.1.1 controllers, views, and models?</p>

There aren't any major changes in the way things are done.  Here is the list of
deprecations
Of course the best way to quickly discover changes is to have a good test suite in place.  If you don't have that, I suggest dropping 2.2 into vendor/rails and clicking around the site by hand.