Today I have re-build the wifi and backlight drivers for MacBook Air against the upcoming Red Hat Enterprise Linux 7.3 kernel. wl-kmod again needed a small patch before it can be compiled. mba6x_bl has been updated to the latest upstream and compiled without errors. The current RPM versions are
akmod-wl-220.127.116.11-9.el7.x86_64.rpm kmod-wl-3.10.0-513.el7.x86_64-18.104.22.168-9.el7.x86_64.rpm kmod-wl-22.214.171.124-9.el7.x86_64.rpm wl-kmod-debuginfo-126.96.36.199-9.el7.x86_64.rpm
kmod-mba6x_bl-20161018.d05c125-1.el7.x86_64.rpm kmod-mba6x_bl-3.10.0-513.el7.x86_64-20161018.d05c125-1.el7.x86_64.rpm mba6x_bl-common-20161018.d05c125-1.el7.x86_64.rpm
and they seem to work fine for me. Let me know if you have any issues after RHEL 7.3 comes out officially.
PS: The bcwc_pcie driver for the video camera appears to be ready for general use, regardless of some issues. No promises here but I'll try to compile that one as well and provide it in my Macbook Air RHEL 7 repository.
PS2: Sometime after Sept 14th I have probably upgraded my system and now it can't detect external displays if the display is not plugged in during boot. I'm seeing the following
# cat /sys/class/drm/card0-DP-1/enabled disabled
which appears to be the same issue reported on the ArchLinux forum. I'm in a hurry to resolve this and any help is welcome.