[PATCH v7 0/6] rust: add `ww_mutex` support

[Onur Özkan]

Changes in v7:
  - Split Class and AcquireCtx into separate modules.
  - Removed "Ww" prefixes from type names.
  - Renamed exec.rs -> lock_set.rs and ExecContext -> LockSet.
  - Removed transmute logic from LockSet (formerly ExecContext).
  - Improved various doc-comments.
  - Marked certain AcquireCtx functions as unsafe.
  - Added from_raw constructors for Mutex, MutexGuard, AcquireCtx
    and Class.
  - LockSet::cleanup_on_deadlock no longer triggers reallocations when
    reinitializing AcquireCtx.
  - Incorporated various minor improvements suggested on the v6 series.

Changes in v6:
  - Added `unpinned_new` constructor for `WwClass` and updated
    global macros.
  - Changed all tests (and docs) to use Arc/KBox instead of
    `stack_pin_init` for `WwMutex` and `WwAcquireCtx`.
  - Added `LockKind` and `lock_common` helper to unify locking logic.
  - Added context-based and context-free locking functions for `WwMutex`.
  - Added `ww_mutex/exec` module, a high-level API with auto `EDEADLK`
    handling mechanism.

Changes in v5:
  - Addressed documentation review notes.
  - Removed `unwrap()`s in examples and KUnit tests.

Onur Özkan (6):
  rust: add C wrappers for ww_mutex inline functions
  rust: implement `Class` for ww_class support
  rust: error: add EDEADLK
  rust: ww_mutex: add Mutex, AcquireCtx and MutexGuard
  rust: ww_mutex: implement LockSet
  rust: add test coverage for ww_mutex implementation

 MAINTAINERS                                   |   1 +
 rust/helpers/helpers.c                        |   1 +
 rust/helpers/ww_mutex.c                       |  39 ++
 rust/kernel/error.rs                          |   1 +
 rust/kernel/sync/lock.rs                      |   1 +
 rust/kernel/sync/lock/ww_mutex.rs             | 440 ++++++++++++++++++
 rust/kernel/sync/lock/ww_mutex/acquire_ctx.rs | 211 +++++++++
 rust/kernel/sync/lock/ww_mutex/class.rs       | 156 +++++++
 rust/kernel/sync/lock/ww_mutex/lock_set.rs    | 410 ++++++++++++++++
 9 files changed, 1260 insertions(+)
 create mode 100644 rust/helpers/ww_mutex.c
 create mode 100644 rust/kernel/sync/lock/ww_mutex.rs
 create mode 100644 rust/kernel/sync/lock/ww_mutex/acquire_ctx.rs
 create mode 100644 rust/kernel/sync/lock/ww_mutex/class.rs
 create mode 100644 rust/kernel/sync/lock/ww_mutex/lock_set.rs

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2.51.2