Comment # 16 on bug 1075876 from Achim Mildenberger

Created attachment 768193 [details]
Test with kernel 4.16.3-1.g2fd48c5-default

Thanks for the customized 4.16.3 kernel.
Attached is a log of your kernel 4.16.3-1.g2fd48c5-default. Took some reboots,
but finally "No SYSCFI in TSYNCRXCTL" happened. The reached uptime is fine.

The log in #14 shows a "No SYSCFI in TSYNCRXCTL" during shutdown, it's not
during regular use. Well, I don't know whether this is relevant.

Thank you very much for your explanations! It's a weird situation that kernel
developers have to rely on "reserved flags" or "undocumented features".