breeze/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-01-12 00:42:35 +08:00
Code Issues Packages Projects Releases Wiki Activity

rust: sync: Add SpinLockGuard type alias

Browse Source 
A simple helper alias for code that needs to deal with Guard types returned
from SpinLocks.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20241120222742.2490495-3-lyude@redhat.com
This commit is contained in:
Lyude Paul
2024-11-20 17:26:29 -05:00
committed by Boqun Feng
parent 37624dde47
commit eb5ccb0382
2 changed files with 9 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
rust/kernel/sync.rs
View File

@@ -17,7 +17,7 @@ pub use arc::{Arc, ArcBorrow, UniqueArc};
pub use condvar::{new_condvar, CondVar, CondVarTimeoutResult};
pub use lock::global::{global_lock, GlobalGuard, GlobalLock, GlobalLockBackend, GlobalLockedBy};
pub use lock::mutex::{new_mutex, Mutex, MutexGuard};
pub use lock::spinlock::{new_spinlock, SpinLock};
pub use lock::spinlock::{new_spinlock, SpinLock, SpinLockGuard};
pub use locked_by::LockedBy;
/// Represents a lockdep class. It's a wrapper around C's `lock_class_key`.

8
rust/kernel/sync/lock/spinlock.rs
View File

@@ -87,6 +87,14 @@ pub type SpinLock<T> = super::Lock<T, SpinLockBackend>;
/// A kernel `spinlock_t` lock backend.
pub struct SpinLockBackend;
/// A [`Guard`] acquired from locking a [`SpinLock`].
///
/// This is simply a type alias for a [`Guard`] returned from locking a [`SpinLock`]. It will unlock
/// the [`SpinLock`] upon being dropped.
///
/// [`Guard`]: super::Guard
pub type SpinLockGuard<'a, T> = super::Guard<'a, T, SpinLockBackend>;
// SAFETY: The underlying kernel `spinlock_t` object ensures mutual exclusion. `relock` uses the
// default implementation that always calls the same locking method.
unsafe impl super::Backend for SpinLockBackend {