pm24.git/rust/kernel, branch v6.3-rc7

Merge tag 'rust-6.3' of https://github.com/Rust-for-Linux/linux

2023-02-20T18:40:42Z

Pull Rust updates from Miguel Ojeda: "More core additions, getting closer to a point where the first Rust modules can be upstreamed. The major ones being: - Sync: new types 'Arc', 'ArcBorrow' and 'UniqueArc'. - Types: new trait 'ForeignOwnable' and new type 'ScopeGuard'. There is also a substantial removal in terms of lines: - 'alloc' crate: remove the 'borrow' module (type 'Cow' and trait 'ToOwned')" * tag 'rust-6.3' of https://github.com/Rust-for-Linux/linux: rust: delete rust-project.json when running make clean rust: MAINTAINERS: Add the zulip link rust: types: implement `ForeignOwnable` for `Arc` rust: types: implement `ForeignOwnable` for the unit type rust: types: implement `ForeignOwnable` for `Box` rust: types: introduce `ForeignOwnable` rust: types: introduce `ScopeGuard` rust: prelude: prevent doc inline of external imports rust: sync: add support for dispatching on Arc and ArcBorrow. rust: sync: introduce `UniqueArc` rust: sync: allow type of `self` to be `ArcBorrow` rust: sync: introduce `ArcBorrow` rust: sync: allow coercion from `Arc` to `Arc` rust: sync: allow type of `self` to be `Arc` or variants rust: sync: add `Arc` for ref-counted allocations rust: compiler_builtins: make stubs non-global rust: alloc: remove the `borrow` module (`ToOwned`, `Cow`)

rust: types: implement `ForeignOwnable` for `Arc`

2023-02-07T10:24:24Z

This allows us to hand ownership of Rust ref-counted objects to the C side of the kernel. Signed-off-by: Wedson Almeida Filho Reviewed-by: Gary Guo Reviewed-by: Vincenzo Palazzo Reviewed-by: Alice Ferrazzi Reviewed-by: Andreas Hindborg Signed-off-by: Miguel Ojeda

rust: types: implement `ForeignOwnable` for the unit type

2023-02-01T12:24:36Z

This allows us to use the unit type `()` when we have no object whose ownership must be managed but one implementing the `ForeignOwnable` trait is needed. Signed-off-by: Wedson Almeida Filho Reviewed-by: Vincenzo Palazzo Reviewed-by: Gary Guo Reviewed-by: Andreas Hindborg Signed-off-by: Miguel Ojeda

rust: types: implement `ForeignOwnable` for `Box`

2023-02-01T12:24:19Z

This allows us to hand ownership of Rust dynamically allocated objects to the C side of the kernel. Signed-off-by: Wedson Almeida Filho Reviewed-by: Gary Guo Reviewed-by: Vincenzo Palazzo Reviewed-by: Alice Ferrazzi Reviewed-by: Andreas Hindborg Signed-off-by: Miguel Ojeda

rust: types: introduce `ForeignOwnable`

2023-02-01T12:24:07Z

It was originally called `PointerWrapper`. It is used to convert a Rust object to a pointer representation (void *) that can be stored on the C side, used, and eventually returned to Rust. Signed-off-by: Wedson Almeida Filho Reviewed-by: Vincenzo Palazzo Reviewed-by: Martin Rodriguez Reboredo Reviewed-by: Gary Guo Reviewed-by: Andreas Hindborg Signed-off-by: Miguel Ojeda

rust: types: introduce `ScopeGuard`

2023-01-31T23:14:01Z

This allows us to run some code when the guard is dropped (e.g., implicitly when it goes out of scope). We can also prevent the guard from running by calling its `dismiss()` method. Signed-off-by: Wedson Almeida Filho Reviewed-by: Vincenzo Palazzo Reviewed-by: Andreas Hindborg Signed-off-by: Miguel Ojeda

rust: prelude: prevent doc inline of external imports

2023-01-16T22:49:46Z

This shows exactly where the items are from, previously the items from macros, alloc and core were shown as a declaration from the kernel crate, this shows the correct path. Link: https://github.com/rust-lang/rust/issues/106713 Signed-off-by: Finn Behrens Reviewed-by: Vincenzo Palazzo [Reworded to add Link, fixed two typos and comment style] Signed-off-by: Miguel Ojeda

rust: sync: add support for dispatching on Arc and ArcBorrow.

2023-01-16T22:48:06Z

Trait objects (`dyn T`) require trait `T` to be "object safe". One of the requirements for "object safety" is that the receiver have one of the allowed types. This commit adds `Arc` and `ArcBorrow<'_, T>` to the list of allowed types. Signed-off-by: Wedson Almeida Filho Reviewed-by: Alice Ryhl Reviewed-by: Gary Guo Reviewed-by: Vincenzo Palazzo Acked-by: Boqun Feng Signed-off-by: Miguel Ojeda

rust: sync: introduce `UniqueArc`

2023-01-16T22:48:06Z

Since `Arc` does not allow mutating `T` directly (i.e., without inner mutability), it is currently not possible to do some initialisation of `T` post construction but before being shared. `UniqueArc` addresses this problem essentially being an `Arc` that has a refcount of 1 and is therefore writable. Once initialisation is completed, it can be transitioned (without failure paths) into an `Arc`. Suggested-by: Gary Guo Signed-off-by: Wedson Almeida Filho Reviewed-by: Alice Ryhl Reviewed-by: Gary Guo Reviewed-by: Vincenzo Palazzo Acked-by: Boqun Feng Signed-off-by: Miguel Ojeda

rust: sync: allow type of `self` to be `ArcBorrow`

2023-01-16T22:48:06Z

This allows associated functions whose `self` argument has `ArcBorrow` as their type. This, in turn, allows callers to use the dot syntax to make calls. Signed-off-by: Wedson Almeida Filho Reviewed-by: Alice Ryhl Reviewed-by: Gary Guo Reviewed-by: Vincenzo Palazzo Acked-by: Boqun Feng Signed-off-by: Miguel Ojeda