Android RIL SELinux confusion

Can someone explain exactly what the statement “By default, Security Enhanced Linux (SELinux) is enforced in Android 5.0. Make sure that this feature is disabled in the kernel .config file” means as far as why we must disable SELinux? We are trying to use RIL with Android 6 and this is not really an option and/or too risky to turn off in an actual product. The statement “Otherwise, settings to the Android operation system have to be customized” is vague. Can anyone outline exactly what these changes need to be?

Did you check your kernel .config file? what did you find there?