Re: [PATCH v8 00/10] rust: add `register!` macro

[Alexandre Courbot]

On Wed Mar 11, 2026 at 10:07 PM JST, Danilo Krummrich wrote:
> On Wed Mar 11, 2026 at 2:01 PM CET, Alexandre Courbot wrote:
>> On Wed Mar 11, 2026 at 2:20 AM JST, Danilo Krummrich wrote:
>>> On Mon Mar 9, 2026 at 4:13 PM CET, Alexandre Courbot wrote:
>>>> Alexandre Courbot (10):
>>>>       rust: enable the `generic_arg_infer` feature
>>>>       rust: num: add `shr` and `shl` methods to `Bounded`
>>>>       rust: num: add `into_bool` method to `Bounded`
>>>>       rust: num: make Bounded::get const
>>>>       rust: io: add IoLoc type and generic I/O accessors
>>>>       rust: io: use generic read/write accessors for primitive accesses
>>>>       rust: io: introduce `IntoIoVal` trait and single-argument `write_val`
>>>>       rust: io: add `register!` macro
>>>>       sample: rust: pci: use `register!` macro
>>>>       [FOR REFERENCE] gpu: nova-core: use the kernel `register!` macro
>>>
>>> I did not look into the root cause, but fetching this patch series my build
>>> fails due to a build_assert!(). Maybe you have CONFIG_RUST_BUILD_ASSERT_ALLOW
>>> enabled?
>>
>> Nope, it is disabled and I build with Clippy so I am surprised you are
>> getting this. Do you know which module is failing?
>
> ERROR: modpost: "rust_build_error" [drivers/gpu/nova-core/nova_core.ko] undefined!

Does it happen with the exact branch I posted?

https://github.com/Gnurou/linux/tree/b4/register

This one builds fine for me.

Gary also pointed out a few missing `inlines` that could potentially
trigger that kind of error. But I'd be curious to try and reproduce
myself if you can post your tree somewhere.