Re: [PATCH 0/7] misc device: support device drivers

[Christian Schrefl <chrisi.schrefl@gmail.com>]

Hi Danilo

On 30.05.25 4:24 PM, Danilo Krummrich wrote:
> This patch series adds support for device drivers to the misc device
> abstraction.
> 
> For design details, please see:
>   * patch 5 "rust: miscdevice: properly support device drivers"
>   * patch 6 "rust: miscdevice: expose the parent device as &Device<Bound>"
> 
> This patch series depends on the pin-init series from Benno [1] as well as on
> the misc device series from Christian [2], with UnsafePinned replaced with
> Opaque, as suggested by Alice, since UnsafePinned may still take a while to
> land.

If you want I can send out a new version using `Opaque`.

We could also add a type alias like:

type UnsafePinned<T> = Opaque<T>;

That would then be removed in the `UnsafePinned` patches.
This should make the migration simpler.

Cheers
Christian

> 
> A branch containing this series and its dependencies can be found in [3].
> 
> Thanks to Benno for his great help with pin-init!
> 
> [1] https://lore.kernel.org/rust-for-linux/20250529081027.297648-1-lossin@kernel.org/
> [2] https://lore.kernel.org/lkml/20250517-b4-rust_miscdevice_registrationdata-v3-0-cdb33e228d37@gmail.com/
> [3] https://git.kernel.org/pub/scm/linux/kernel/git/dakr/linux.git/log/?h=rust/misc
> 
> Danilo Krummrich (7):
>   rust: types: support fallible PinInit types in Opaque::pin_init
>   rust: revocable: support fallible PinInit types
>   rust: devres: support fallible in-place init for data
>   rust: faux: impl AsRef<Device<Bound>> for Registration
>   rust: miscdevice: properly support device drivers
>   rust: miscdevice: expose the parent device as &Device<Bound>
>   rust: sample: misc: implement device driver sample
> 
>  rust/kernel/devres.rs            |  27 ++-
>  rust/kernel/faux.rs              |   4 +-
>  rust/kernel/miscdevice.rs        | 341 ++++++++++++++++++++++---------
>  rust/kernel/revocable.rs         |   7 +-
>  rust/kernel/types.rs             |   8 +-
>  samples/rust/Kconfig             |   8 +
>  samples/rust/rust_misc_device.rs |  73 +++++--
>  7 files changed, 350 insertions(+), 118 deletions(-)
> 
> 
> base-commit: d5e34ea41dda1500a4dc163d6e96395fe7adc681