Comment # 7 on bug 1140057 from Ignaz Forster

transactional-update was indeed mounting the same upperdir twice if there were
no snapshots older than the current one. Now that the kernel introduced
stricter checks for overlayfs mounting this popped up, but it was never really
correct to start with (but didn't hurt either).

I just released and submitted (https://build.opensuse.org/request/show/714110)
version 2.15 of transactional-update which will avoid to mount an already
mounted upperdir again.

With this patch to transactional-update the reverts to the kernel commits can
also be removed again.