pm24.git, branch rust-6.3

rust: delete rust-project.json when running make clean

2023-02-07T10:24:50Z

rust-project.json is the configuration file used by rust-analyzer. As it is a configuration file and it is not needed to build external modules, it should be delete by make clean. So, delete rust-project.json when running make clean. Link: https://github.com/Rust-for-Linux/linux/issues/939 Suggested-by: Björn Roy Baron Signed-off-by: Maíra Canal Reviewed-by: Finn Behrens Acked-by: Masahiro Yamada Reviewed-by: Vincenzo Palazzo Signed-off-by: Miguel Ojeda

rust: MAINTAINERS: Add the zulip link

2023-02-07T10:24:50Z

Zulip organization "rust-for-linux" was created 2 years ago[1] and has proven to be a great place for Rust related discussion, therefore add the information in MAINTAINERS file so that newcomers have more options to find guide and help. Link: https://lore.kernel.org/rust-for-linux/CANiq72=xVaMQkgCA9rspjV8bhWDGqAn4x78B0_4U1WBJYj1PiA@mail.gmail.com/ [1] Signed-off-by: Boqun Feng Reviewed-by: Vincenzo Palazzo Reviewed-by: Alice Ferrazzi Signed-off-by: Miguel Ojeda

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