On Mon, 16 Aug 2021 at 11:59, Lorenzo Pieralisi
[off-list ref] wrote:

On Wed, Aug 11, 2021 at 03:55:08PM +0100, Lorenzo Pieralisi wrote:

quoted

On Wed, Aug 11, 2021 at 03:08:24PM +0100, Christoph Hellwig wrote:

quoted

On Wed, Aug 11, 2021 at 12:40:28PM +0200, Ard Biesheuvel wrote:

quoted

The whole problem we are solving here is that ACPI, being based on
x86, conflates MMIO mappings with memory mappings, and has been using
the same underlying infrastructure for either.

So let's fix that problem instead of papering over it.

Patch (3) in this series is a fix - I would ask whether it makes
sense to merge patches (2-3) now and think about reworking the current
ACPI IO/MEM mapping API later, it can be an invasive change for a fix,
assuming we agree on how to rework the ACPI IO/MEM mapping API.

What should we do then with this series ?

It is not even clear that reworking the ACPI core is feasible to begin
with, OTOH, fixing a sparse warning is arguably not a critical bug fix
either, so I'd suggest we just drop that bit.