REGRESSION in 6.0-rc7 caused by patch "ARM/dma-mapping: use dma-direct unconditionally"

[Christoph Hellwig]

On Fri, Sep 30, 2022 at 08:02:00PM +0200, Marek Behún wrote:
> Are the patches that cause the regression supposed to do only code
> refactoring (although major), or are they supposed to be functional
> changes?

This isn't just refactoring, it is switching to an entirely different
code base that does the same thing, in the boundaries of valid API
behavior.  So yes, it might as well cause problems with totally
broken usage of the API on some drivers that were never used on
anything but arm32 and do very strange things.