ath (AR9460) no longer works after going to 11-STABLE r302483

[Wolfgang Zenker]

* Adrian Chadd <adrian at freebsd.org> [160715 00:00]:
> On 14 July 2016 at 14:37, Wolfgang Zenker <wolfgang at lyxys.ka.sub.org> wrote:
>> * Adrian Chadd <adrian at freebsd.org> [160710 21:47]:
>>> Since you've reverted the ath driver directories without success, I'm
>>> mostly out of simple ideas. I think you need to bisect the whole
>>> kernel version until you find the commit that broke things.

>> done. The commit is 11-STABLE r302410. AFAICS the only change here
>> is the removal of debugging options from the GENERIC kernel config:

>> https://svnweb.freebsd.org/base/stable/11/sys/amd64/conf/GENERIC?r1=302408&r2=302410

> ... loool, okay. Let me see.

> Try INVARIANTS and INVARIANT_SUPPORT. Maybe something in the ath
> driver needs it.. oops!

Nope, wlan0 still works after disabling INVARIANTS and INVARIANT_SUPPORT.
Any suggestions for next try?

Wolfgang