Updated the Cubox-i4Pro to Kernel 4.0-rc3, and still needed to apply the one-line patch to linux/arch/arm/mach-imx/mach-imx6q.c, to get networking to work..  http://rglinuxtech.com/?p=1338

Fedora release 22 (Twenty Two)
Kernel 4.0.0-rc3 on an armv7l (ttymxc0)
............
]# uname -a
Linux rgcubox 4.0.0-rc3 #3 SMP Mon Mar 9 20:19:45 EDT 2015 armv7l armv7l armv7l GNU/Linux

The DreamPlug was OK, and did not need any patches..

Fedora release 18 (Spherical Cow)
Kernel 4.0.0-rc3 on an armv5tel (ttyS0)
...........
]# uname -a
Linux rgdreamplug 4.0.0-rc3 #1 PREEMPT Mon Mar 9 22:07:40 PDT 2015 armv5tel armv5tel armv5tel GNU/Linux

The Odroid U3 Kernel source is still at 4.0-rc1, which did not boot successfully..

Robert Gadsdon.   March 9, 2015.