Pretty much all of it is in mainline modulo the secure boot lockdown patches, which are downstream for all distributions because Linus fundamentally believes th

Pretty much all of it is in mainline modulo the secure boot lockdown patches, which are downstream for all distributions because Linus fundamentally believes those patches do not make sense. Linux longterm often is missing stuff the RHEL kernel has, because RHEL backports subsystems from mainline with features and hardware support.