diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs
index 25d2185df4cb1f1ddee37223a79d6d93f971e25b..2f3156b6aacf5581eac54a53008670662d6c6413 100644
--- a/rust/kernel/sync/arc.rs
+++ b/rust/kernel/sync/arc.rs
@@ -349,9 +349,9 @@ impl<T: 'static> ForeignOwnable for Arc<T> {
     }
 
     unsafe fn borrow<'a>(ptr: *const crate::ffi::c_void) -> ArcBorrow<'a, T> {
-        // By the safety requirement of this function, we know that `ptr` came from
-        // a previous call to `Arc::into_foreign`.
-        let inner = NonNull::new(ptr as *mut ArcInner<T>).unwrap();
+        // SAFETY: The safety requirements of this function ensure that `ptr` comes from a previous
+        // call to `Self::into_foreign`.
+        let inner = unsafe { NonNull::new_unchecked(ptr as *mut ArcInner<T>) };
 
         // SAFETY: The safety requirements of `from_foreign` ensure that the object remains alive
         // for the lifetime of the returned value.
@@ -359,10 +359,14 @@ impl<T: 'static> ForeignOwnable for Arc<T> {
     }
 
     unsafe fn from_foreign(ptr: *const crate::ffi::c_void) -> Self {
+        // SAFETY: The safety requirements of this function ensure that `ptr` comes from a previous
+        // call to `Self::into_foreign`.
+        let inner = unsafe { NonNull::new_unchecked(ptr as *mut ArcInner<T>) };
+
         // SAFETY: By the safety requirement of this function, we know that `ptr` came from
         // a previous call to `Arc::into_foreign`, which guarantees that `ptr` is valid and
         // holds a reference count increment that is transferrable to us.
-        unsafe { Self::from_inner(NonNull::new(ptr as _).unwrap()) }
+        unsafe { Self::from_inner(inner) }
     }
 }