KERNEL=="tty[0-9]|tty1[0-2]", TAG="systemd"
KERNEL=="ttyS*", TAG="systemd"
-SUBSYSTEM=="block", TAG="systemd"
+SUBSYSTEM=="block", KERNEL!="ram*|loop*", TAG="systemd"
# DM finds it funny to create additional device nodes, we need to
merge them here, so that we recognize identical devices.