Comment # 11 on bug 1175779 from Franck Bui

Unfortunately we introduced a bug when we switched to tmpfs for /tmp by default
and we forgot to remove some related code in the specfile.

The consequence of that was the creation of a dangling symlink (pointing to
/usr/share/systemd/tmp.mount which has been removed since the use of tmpfs) for
users who switched to tmpfs for /tmp.

Please note that the dangling symlink was created during the _second_ update of
systemd, which followed a former update that already contained the switch to
tmpfs for /tmp by default.

For affected users, the problem arose during a reboot after this second update.
Either the system failed to boot completely because / was left RO or /tmp
wasn't mounted at all.

Fortunately, a fix is already available in the Update channel, kudos to Fabian
Vogt !

Conclusion
----------
1. only users that switched to tmpfs by default should be affected

2. make sure /tmp entry in fstab is commented out (as it was recommended in
[1])

3. make sure to update systemd ASAP, so the dangling symlink is automatically
fixed and points to /usr/lib/systemd/system/tmp.mount

4. ensure that the symlink is correct after the update and if so feel free to
erase it as there's no point to override a unit by itself. We don't do that
automatically because it highly depends on 2. to be done.

5. reboot to make sure that /tmp is correctly mounted.

[1] https://en.opensuse.org/openSUSE:Tmp_on_tmpfs