On Fri, Aug 20, 2021 at 09:03:16AM -0400, Jeff Layton wrote:

Good point. It wouldn't hurt to push such a warning into stable kernels
at the same time. There always is a lag when we do something like this
before some downstream user notices.

Yes, that's why I proposed this. A warning can be backported into
stable without big consequences except warning future victims...

Willy