Comment # 2 on bug 948771 from Fabian Vogt

To the "systemd-fstab-generator" messages: The "root=" parameter in
/proc/cmdline is equvalent to an entry in /etc/fstab, so the warning is
expected and necessary (although it could be worded better) as the mount
options in /etc/fstab for / are ignored. See also
http://lists.opensuse.org/opensuse-factory/2015-10/msg00138.html
The goal is to remove "root=" from the default kernel commandline, but that's a
multi-stage process. If the warning is too annoying or has any other side
effects it'd definitely be possible to revert the patch or just remove the
warning.

I can confirm that the other errors are also there for me.
The udev error is actually even in the sg3_utils upstream package and a result
of a rogue commented line.
The kdm_config warning is a result of /var/adm/kdmrc.sysconfig (its purpose is
to have the information from sysconfig entries).
The kdm_greet error has been there for a long time already, I remember seeing
it in 13.1.