[PATCH v2 03/14] rust: sync: add `Arc::as_ptr`

[Andreas Hindborg <a.hindborg@kernel.org>]

Add a method to get a pointer to the data contained in an `Arc`.

Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
---
 rust/kernel/sync/arc.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs
index 3673496c2363..a57ea3e2b44c 100644
--- a/rust/kernel/sync/arc.rs
+++ b/rust/kernel/sync/arc.rs
@@ -258,6 +258,14 @@ pub fn into_raw(self) -> *const T {
         unsafe { core::ptr::addr_of!((*ptr).data) }
     }
 
+    /// Return a raw pointer to the data in this arc.
+    pub fn as_ptr(&self) -> *const T {
+        let ptr = self.ptr.as_ptr();
+        // SAFETY: As we derive the pointer from a reference above, the pointer
+        // must be valid.
+        unsafe { core::ptr::addr_of!((*ptr).data) }
+    }
+
     /// Recreates an [`Arc`] instance previously deconstructed via [`Arc::into_raw`].
     ///
     /// # Safety
-- 
2.46.0