Add a method to `Request` for obtaining the associated `RequestQueue`.

Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
---
 rust/kernel/block/mq/request.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/rust/kernel/block/mq/request.rs b/rust/kernel/block/mq/request.rs
index f6addd20624a9..d6f3ffde1c5c4 100644
--- a/rust/kernel/block/mq/request.rs
+++ b/rust/kernel/block/mq/request.rs
@@ -19,6 +19,7 @@
 };
 use core::{ffi::c_void, marker::PhantomData, ops::Deref, ptr::NonNull};
 
+use super::RequestQueue;
 use crate::block::bio::Bio;
 use crate::block::bio::BioIterator;
 
@@ -118,6 +119,12 @@ pub fn queue_data(&self) -> <T::QueueData as ForeignOwnable>::Borrowed<'_> {
         // SAFETY: By type invariants of `Request`, `self.0` is a valid request.
         unsafe { T::QueueData::borrow((*(*self.0.get()).q).queuedata) }
     }
+
+    /// Get the request queue associated with this request.
+    pub fn queue(&self) -> &RequestQueue<T> {
+        // SAFETY: By type invariant, self.0 is guaranteed to be valid.
+        unsafe { RequestQueue::from_raw((*self.0.get()).q) }
+    }
 }
 
 /// A wrapper around a blk-mq [`struct request`]. This represents an IO request.

-- 
2.51.2