FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git regulatory
commit 6b96626bbd91386f15988623e339a97c4802ae5c ("cfg80211: support loading regulatory database as firmware file")

The following new message in kernel log may make end user confusing.

[   28.277962] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[   28.297466] cfg80211: failed to load regulatory.db
[   28.323283] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[   28.352132] cfg80211: failed to load regulatory.db


Thanks,
Ying Huang