Re: [PATCH 01/12] rust: io: add Region::try_subregion

[Gary Guo]

On Fri Aug 7, 2026 at 3:03 PM BST, Alexandre Courbot wrote:
> On Wed Aug 5, 2026 at 7:43 PM JST, Gary Guo wrote:
>> On Wed Aug 5, 2026 at 6:44 AM BST, Eliot Courtney wrote:
>>> Add a helper to get a subregion of an IO view fallibly.
>>>
>>> Signed-off-by: Eliot Courtney <ecourtney@xxxxxxxxxx>
>>> ---
>>>  rust/kernel/io.rs | 31 ++++++++++++++++++++++++++++++-
>>>  1 file changed, 30 insertions(+), 1 deletion(-)
>>
>> Looks like the case where you need this don't actually require a `Region`
>> (dynamically sized type) but rather a fixed size window?
>>
>> In that case the next version of
>> https://lore.kernel.org/rust-for-linux/20260721-typed_register-v1-0-452d72b60262@xxxxxxxxxxx/
>> will contain what you need.
>
> Looks like we are going to need to full series (or at least until and
> including patch 11) before this can get in. Gary, what tree are you
> planning to merge the register projection series into? It would be nice
> if we could do it in a way that makes it possible for this series to be
> merged shortly after (either through `drm-rust-next`, or a merged signed
> tag) for the next cycle.

I think a topic branch next cycle would be the best approach. That said, given
that all non-sample drivers using it is drm, this can be taken through drm-rust
too. I guess it's Danilo's call.

Best,
Gary