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-rw-r--r--rust/kernel/sync/lock/mutex.rs15
1 files changed, 13 insertions, 2 deletions
diff --git a/rust/kernel/sync/lock/mutex.rs b/rust/kernel/sync/lock/mutex.rs
index 30632070ee67..0e946ebefce1 100644
--- a/rust/kernel/sync/lock/mutex.rs
+++ b/rust/kernel/sync/lock/mutex.rs
@@ -58,7 +58,7 @@ pub use new_mutex;
/// }
///
/// // Allocate a boxed `Example`.
-/// let e = Box::pin_init(Example::new(), GFP_KERNEL)?;
+/// let e = KBox::pin_init(Example::new(), GFP_KERNEL)?;
/// assert_eq!(e.c, 10);
/// assert_eq!(e.d.lock().a, 20);
/// assert_eq!(e.d.lock().b, 30);
@@ -96,7 +96,7 @@ unsafe impl super::Backend for MutexBackend {
unsafe fn init(
ptr: *mut Self::State,
- name: *const core::ffi::c_char,
+ name: *const crate::ffi::c_char,
key: *mut bindings::lock_class_key,
) {
// SAFETY: The safety requirements ensure that `ptr` is valid for writes, and `name` and
@@ -115,4 +115,15 @@ unsafe impl super::Backend for MutexBackend {
// caller is the owner of the mutex.
unsafe { bindings::mutex_unlock(ptr) };
}
+
+ unsafe fn try_lock(ptr: *mut Self::State) -> Option<Self::GuardState> {
+ // SAFETY: The `ptr` pointer is guaranteed to be valid and initialized before use.
+ let result = unsafe { bindings::mutex_trylock(ptr) };
+
+ if result != 0 {
+ Some(())
+ } else {
+ None
+ }
+ }
}