Yesterday I've upgraded to Red Hat Enterprise Linux 7.2 on my MacBook Air and I decided to rebuild the wifi and backlight drivers. Wifi broke immediately but I was able to fix the build with a simple patch. I'm now using the newly built kmod-wl-3.10.0-327.el7.x86_64-22.214.171.124-7.el7.x86_64 and it appears to work as expected.
The mba6x_bl driver built without problems however I'm having problems when closing the laptop lid. The screen stays on and (I think) the computer doesn't suspend. My battery was drained as I left the computer as-is overnight. Suspending from the Desktop menu however appears to work. See Issue #41. I'd love to get some help in debugging what's going wrong and trying to fix it. At this point I have no idea where to look and if it's the driver to blame or something else on the system.