Seems that Jolla C2 can run "close-to" mainline kernel: https://forum.sailfishos.org/t/mainline-linux-kernel-for-the...
It's a great work by a community member, but it's not something Jolla is supporting and it still has a long way to go.
alt Hacker News
It's a great work by a community member, but it's not something Jolla is supporting and it still has a long way to go.