[PATCH v11 0/6] rust: add ww_mutex support

[Onur Özkan]

This series adds Rust abstractions for ww_mutex, including Class, Mutex,
AcquireCtx and MutexGuard. LockSet handles deadlock recovery for callers
that need to acquire multiple locks.

Changes in v11:
  - Rebased and dropped the EDEADLK patch, which is already covered by
    the base tree.
  - Removed the slow-path locking APIs and helpers and AcquireCtx::reinit().
  - Relaxed the Mutex Sync bound and fixed the MutexGuard::from_raw()
    safety contract.
  - Made AcquireCtx locking methods unsafe to account for leaked
    guards, and made AcquireCtx::done() safe.
  - Fixed the LockSet double unlock on allocation failure. Deadlock
    recovery now waits for and holds the contended lock before retrying.
  - Made use statements vertical.

Previous version:
https://lore.kernel.org/all/20260103073554.34855-1-work@xxxxxxxxxxxxx/

Onur Özkan (6):
  rust: add C wrappers for ww_mutex inline functions
  ww_mutex: add ww_class field unconditionally
  rust: implement Class for ww_class support
  rust: ww_mutex: add Mutex, AcquireCtx and MutexGuard
  rust: ww_mutex: implement LockSet
  MAINTAINERS: add Onur Özkan as WW MUTEX maintainer

 MAINTAINERS                                   |   2 +
 include/linux/ww_mutex.h                      |   8 +-
 rust/helpers/helpers.c                        |   1 +
 rust/helpers/ww_mutex.c                       |  33 ++
 rust/kernel/sync/lock.rs                      |   1 +
 rust/kernel/sync/lock/ww_mutex.rs             | 443 +++++++++++++++++
 rust/kernel/sync/lock/ww_mutex/acquire_ctx.rs | 148 ++++++
 rust/kernel/sync/lock/ww_mutex/class.rs       | 144 ++++++
 rust/kernel/sync/lock/ww_mutex/lock_set.rs    | 448 ++++++++++++++++++
 9 files changed, 1222 insertions(+), 6 deletions(-)
 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


base-commit: 47324d3a5b3abd781295044d01d92d09f184e872
-- 
2.51.2