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authorNamhyung Kim <namhyung@kernel.org>2025-02-05 14:57:18 -0800
committerNamhyung Kim <namhyung@kernel.org>2025-02-05 14:57:18 -0800
commit9e676a024fa1fa2bd8150c2d2ba85478280353bc (patch)
tree5cf0e1d4ab27002fcafdc7dc5bdfdd9ff3f3c9f1 /rust/kernel/sync/lock/spinlock.rs
parent357b965deba9fb71467413e473764ec4e1694d8d (diff)
parent2014c95afecee3e76ca4a56956a936e23283f05b (diff)
Merge tag 'v6.14-rc1' into perf-tools-next
To get the various fixes in the current master. Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'rust/kernel/sync/lock/spinlock.rs')
-rw-r--r--rust/kernel/sync/lock/spinlock.rs13
1 files changed, 13 insertions, 0 deletions
diff --git a/rust/kernel/sync/lock/spinlock.rs b/rust/kernel/sync/lock/spinlock.rs
index 9f4d128bed98..ab2f8d075311 100644
--- a/rust/kernel/sync/lock/spinlock.rs
+++ b/rust/kernel/sync/lock/spinlock.rs
@@ -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 {
@@ -125,4 +133,9 @@ unsafe impl super::Backend for SpinLockBackend {
None
}
}
+
+ unsafe fn assert_is_held(ptr: *mut Self::State) {
+ // SAFETY: The `ptr` pointer is guaranteed to be valid and initialized before use.
+ unsafe { bindings::spin_assert_is_held(ptr) }
+ }
}