For those who have a new Raspberry Pi 2 on order – as I have – the kernel source is now available, at https://github.com/raspberrypi/linux/tree/rpi-3.18.y-rebase.
To get the correct config, start with # make bcm2709_defconfig
For me, one of the additional benefits is that it is ARMv7, which should support the standard up-to-date Fedora 21 distro, instead of the older ARMv6 ‘Pidora’..
I will post more details after the hardware arrives…
Robert Gadsdon. February 2, 2015.