[PATCH v2 0/2] rust: sync: Arc: Any downcasting and assume_init()

[Asahi Lina]

Hi everyone,

This short series is part of the set of dependencies for the drm/asahi
Apple M1/M2 GPU driver.

The two patches simply add two missing features to the kernel Arc
implementation which are present in the Rust std version: `Any`
downcasting and `assume_init()`.

Signed-off-by: Asahi Lina <lina@xxxxxxxxxxxxx>
---
Changes in v2:
- #1: Moved the new function to a separate file, to keep the licensing
  clearer.
- #2: Replaced the safety comment with Benno's, from his pin-init series
  (we both wrote the same patch).
- Link to v1: https://lore.kernel.org/r/20230224-rust-arc-v1-0-568eea613a41@xxxxxxxxxxxxx

---
Asahi Lina (2):
      rust: sync: arc: Implement Arc<dyn Any + Send + Sync>::downcast()
      rust: sync: arc: Add UniqueArc<MaybeUninit<T>::assume_init()
 rust/kernel/sync/arc.rs            | 13 +++++++++++++
 rust/kernel/sync/arc/std_vendor.rs | 28 ++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)
---
base-commit: fe15c26ee26efa11741a7b632e9f23b01aca4cc6
change-id: 20230224-rust-arc-ba3c26ed4e6a

Thank you,
~~ Lina