Canon pertinent changes in LR CC 2015.10 (same Canon support in Camera Raw 9.10):
The goal of this release is to provide additional camera raw support, lens profile support and address bugs that were introduced in previous releases of Lightroom.
Today, we also released versions of Lr for iOS and Android that provide updated camera support. Check them out here.
New Camera Support in Lightroom CC 2015.10 / 6.10:
Canon EOS M6
Canon EOS Digital Rebel T7i (EOS 800D, EOS Kiss X9i)
Canon EOS 77D (EOS 9000D)
Support for new Canon mount lenses was also added.