[GIT PULL] Rust for 6.3

[Miguel Ojeda]

Hi Linus,

A new set of features for the Rust support.

By the time you pick this, these commits will have been in linux-next
for quite a while. No conflicts expected. No changes to the C side.

Please pull for v6.3 -- thanks!

Cheers,
Miguel

The following changes since commit 5dc4c995db9eb45f6373a956eb1f69460e69e6d4:

  Linux 6.2-rc4 (2023-01-15 09:22:43 -0600)

are available in the Git repository at:

  https://github.com/Rust-for-Linux/linux tags/rust-6.3

for you to fetch changes up to 7ea01d3169a28d090fc8f22e7fcb4e4f1090c2d2:

  rust: delete rust-project.json when running make clean (2023-02-07 11:24:50 +0100)

----------------------------------------------------------------
Rust changes for v6.3

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').

----------------------------------------------------------------
Boqun Feng (1):
      rust: MAINTAINERS: Add the zulip link

Finn Behrens (1):
      rust: prelude: prevent doc inline of external imports

Gary Guo (1):
      rust: compiler_builtins: make stubs non-global

Maíra Canal (1):
      rust: delete rust-project.json when running make clean

Miguel Ojeda (1):
      rust: alloc: remove the `borrow` module (`ToOwned`, `Cow`)

Wedson Almeida Filho (12):
      rust: sync: add `Arc` for ref-counted allocations
      rust: sync: allow type of `self` to be `Arc<T>` or variants
      rust: sync: allow coercion from `Arc<T>` to `Arc<U>`
      rust: sync: introduce `ArcBorrow`
      rust: sync: allow type of `self` to be `ArcBorrow<T>`
      rust: sync: introduce `UniqueArc`
      rust: sync: add support for dispatching on Arc and ArcBorrow.
      rust: types: introduce `ScopeGuard`
      rust: types: introduce `ForeignOwnable`
      rust: types: implement `ForeignOwnable` for `Box<T>`
      rust: types: implement `ForeignOwnable` for the unit type
      rust: types: implement `ForeignOwnable` for `Arc<T>`

 MAINTAINERS                     |   1 +
 Makefile                        |   2 +-
 rust/Makefile                   |  15 ++
 rust/alloc/borrow.rs            | 498 --------------------------------------
 rust/alloc/lib.rs               |   3 +-
 rust/alloc/vec/mod.rs           |   3 +
 rust/bindings/bindings_helper.h |   1 +
 rust/bindings/lib.rs            |   1 +
 rust/compiler_builtins.rs       |   5 +-
 rust/helpers.c                  |  19 ++
 rust/kernel/lib.rs              |   6 +
 rust/kernel/prelude.rs          |   8 +-
 rust/kernel/sync.rs             |  10 +
 rust/kernel/sync/arc.rs         | 524 ++++++++++++++++++++++++++++++++++++++++
 rust/kernel/types.rs            | 215 ++++++++++++++++-
 15 files changed, 808 insertions(+), 503 deletions(-)
 delete mode 100644 rust/alloc/borrow.rs
 create mode 100644 rust/kernel/sync.rs
 create mode 100644 rust/kernel/sync/arc.rs