linux-kernel - [PATCH 00/10] Allocation APIs

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Date: Mon, 25 Mar 2024 16:54:08 -0300
From: Wedson Almeida Filho <wedsonaf@...il.com>
To: rust-for-linux@...r.kernel.org
Cc: Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <benno.lossin@...ton.me>,
	Andreas Hindborg <a.hindborg@...sung.com>,
	Alice Ryhl <aliceryhl@...gle.com>,
	linux-kernel@...r.kernel.org,
	Wedson Almeida Filho <walmeida@...rosoft.com>
Subject: [PATCH 00/10] Allocation APIs

From: Wedson Almeida Filho <walmeida@...rosoft.com>

Revamp how we use the `alloc` crate.

We currently have a fork of the crate with changes to `Vec`; other
changes have been upstreamed (to the Rust project). This series removes
the fork and exposes all the functionality as extension traits.

Additionally, it also introduces allocation flag parameters to all
functions that may result in allocations (e.g., `Box::new`, `Arc::new`,
`Vec::push`, etc.) without the `try_` prefix -- the names are available
because we build `alloc` with `no_global_oom_handling`.

Lastly, the series also removes our reliance on the `allocator_api`
unstable feature.

Long term, we still want to make such functionality available in
upstream Rust, but this allows us to make progress now and reduces our
maintainance burden.

In summary:
1. Removes `alloc` fork
2. Removes use of `allocator_api` unstable feature
3. Introduces flags (e.g., GFP_KERNEL, GFP_ATOMIC) when allocating

Wedson Almeida Filho (10):
  rust: kernel: move `allocator` module under `alloc`
  rust: alloc: introduce the `VecExt` trait
  kbuild: use the upstream `alloc` crate
  rust: alloc: remove our fork of the `alloc` crate
  rust: alloc: introduce allocation flags
  rust: alloc: introduce the `BoxExt` trait
  rust: alloc: update `VecExt` to take allocation flags
  rust: sync: update `Arc` and `UniqueArc` to take allocation flags
  rust: init: update `init` module to take allocation flags
  rust: kernel: remove usage of `allocator_api` unstable feature

 rust/Makefile                        |   16 +-
 rust/alloc/README.md                 |   36 -
 rust/alloc/alloc.rs                  |  452 ----
 rust/alloc/boxed.rs                  | 2463 -----------------
 rust/alloc/collections/mod.rs        |  160 --
 rust/alloc/lib.rs                    |  288 --
 rust/alloc/raw_vec.rs                |  611 -----
 rust/alloc/slice.rs                  |  890 -------
 rust/alloc/vec/drain.rs              |  255 --
 rust/alloc/vec/extract_if.rs         |  115 -
 rust/alloc/vec/into_iter.rs          |  454 ----
 rust/alloc/vec/is_zero.rs            |  204 --
 rust/alloc/vec/mod.rs                | 3683 --------------------------
 rust/alloc/vec/partial_eq.rs         |   49 -
 rust/alloc/vec/set_len_on_drop.rs    |   35 -
 rust/alloc/vec/spec_extend.rs        |  119 -
 rust/bindings/bindings_helper.h      |    3 +
 rust/kernel/alloc.rs                 |   68 +
 rust/kernel/{ => alloc}/allocator.rs |    6 +-
 rust/kernel/alloc/boxext.rs          |   60 +
 rust/kernel/alloc/vecext.rs          |  120 +
 rust/kernel/error.rs                 |   13 +-
 rust/kernel/init.rs                  |   57 +-
 rust/kernel/lib.rs                   |    5 +-
 rust/kernel/prelude.rs               |    2 +
 rust/kernel/str.rs                   |    6 +-
 rust/kernel/sync/arc.rs              |   44 +-
 rust/kernel/sync/condvar.rs          |    2 +-
 rust/kernel/sync/lock/mutex.rs       |    2 +-
 rust/kernel/sync/lock/spinlock.rs    |    2 +-
 rust/kernel/types.rs                 |    4 +-
 rust/kernel/workqueue.rs             |   14 +-
 samples/rust/rust_minimal.rs         |    6 +-
 samples/rust/rust_print.rs           |    4 +-
 scripts/generate_rust_analyzer.py    |    2 +-
 35 files changed, 340 insertions(+), 9910 deletions(-)
 delete mode 100644 rust/alloc/README.md
 delete mode 100644 rust/alloc/alloc.rs
 delete mode 100644 rust/alloc/boxed.rs
 delete mode 100644 rust/alloc/collections/mod.rs
 delete mode 100644 rust/alloc/lib.rs
 delete mode 100644 rust/alloc/raw_vec.rs
 delete mode 100644 rust/alloc/slice.rs
 delete mode 100644 rust/alloc/vec/drain.rs
 delete mode 100644 rust/alloc/vec/extract_if.rs
 delete mode 100644 rust/alloc/vec/into_iter.rs
 delete mode 100644 rust/alloc/vec/is_zero.rs
 delete mode 100644 rust/alloc/vec/mod.rs
 delete mode 100644 rust/alloc/vec/partial_eq.rs
 delete mode 100644 rust/alloc/vec/set_len_on_drop.rs
 delete mode 100644 rust/alloc/vec/spec_extend.rs
 create mode 100644 rust/kernel/alloc.rs
 rename rust/kernel/{ => alloc}/allocator.rs (96%)
 create mode 100644 rust/kernel/alloc/boxext.rs
 create mode 100644 rust/kernel/alloc/vecext.rs


base-commit: 768409cff6cc89fe1194da880537a09857b6e4db
-- 
2.34.1