U
Chainfire’s SuperSU app has been updated
today to build in support for the Android L developer preview. Before
now, rooting the developer preview involved a few workarounds with
custom boot images so root permissions should work properly, but that
should all be fixed up now.
If you’ve been using the L developer preview, have you tried rooting it yet, or are you fine with using a non-rooted device?
source: XDA Developers