[PATCH v7 0/9] LKMM generic atomics in Rust

[Boqun Feng]

Hi all,

This is the v7 of LKMM atomics in Rust, you can find the previous
versions at:

v6: https://lore.kernel.org/rust-for-linux/20250710060052.11955-1-boqun.feng@xxxxxxxxx/
v5: https://lore.kernel.org/rust-for-linux/20250618164934.19817-1-boqun.feng@xxxxxxxxx/
v4: https://lore.kernel.org/rust-for-linux/20250609224615.27061-1-boqun.feng@xxxxxxxxx/
v3: https://lore.kernel.org/rust-for-linux/20250421164221.1121805-1-boqun.feng@xxxxxxxxx/
v2: https://lore.kernel.org/rust-for-linux/20241101060237.1185533-1-boqun.feng@xxxxxxxxx/
v1: https://lore.kernel.org/rust-for-linux/20240612223025.1158537-1-boqun.feng@xxxxxxxxx/
wip: https://lore.kernel.org/rust-for-linux/20240322233838.868874-1-boqun.feng@xxxxxxxxx/

I think I resolved most of the comments from the last version. I do
really want to see if this can be in v6.17-rc1, please take a look.

Changes since v6:

- Changed the macro format of atomic/ops.rs and improved the safety
  requirements per the suggestion of Benno.
- Used fine-grained trait design like `AllowAtomicAdd` for arithmetic
  operations per the suggestion of Benno.
- Added an `isize_atomic_repr` internal type to reduce the #[cfg(_)]
  usage for implementing Atomic<{i,u}size> per suggestion of Miguel.
- Made barrier functions always inline.
- Documentation and safety comment improvement. Thanks Benno!

Regards,
Boqun

Boqun Feng (9):
  rust: Introduce atomic API helpers
  rust: sync: Add basic atomic operation mapping framework
  rust: sync: atomic: Add ordering annotation types
  rust: sync: atomic: Add generic atomics
  rust: sync: atomic: Add atomic {cmp,}xchg operations
  rust: sync: atomic: Add the framework of arithmetic operations
  rust: sync: atomic: Add Atomic<u{32,64}>
  rust: sync: Add memory barriers
  rust: sync: atomic: Add Atomic<{usize,isize}>

 MAINTAINERS                               |    4 +-
 rust/helpers/atomic.c                     | 1040 +++++++++++++++++++++
 rust/helpers/barrier.c                    |   18 +
 rust/helpers/helpers.c                    |    2 +
 rust/kernel/sync.rs                       |    2 +
 rust/kernel/sync/atomic.rs                |  187 ++++
 rust/kernel/sync/atomic/generic.rs        |  573 ++++++++++++
 rust/kernel/sync/atomic/ops.rs            |  265 ++++++
 rust/kernel/sync/atomic/ordering.rs       |  109 +++
 rust/kernel/sync/barrier.rs               |   61 ++
 scripts/atomic/gen-atomics.sh             |    1 +
 scripts/atomic/gen-rust-atomic-helpers.sh |   67 ++
 12 files changed, 2328 insertions(+), 1 deletion(-)
 create mode 100644 rust/helpers/atomic.c
 create mode 100644 rust/helpers/barrier.c
 create mode 100644 rust/kernel/sync/atomic.rs
 create mode 100644 rust/kernel/sync/atomic/generic.rs
 create mode 100644 rust/kernel/sync/atomic/ops.rs
 create mode 100644 rust/kernel/sync/atomic/ordering.rs
 create mode 100644 rust/kernel/sync/barrier.rs
 create mode 100755 scripts/atomic/gen-rust-atomic-helpers.sh

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