[PATCH v2] rust: alloc: add `NumaNode::id()` accessor

[PATCH v2] rust: alloc: add `NumaNode::id()` accessor

[Andreas Hindborg]

`NumaNode` wraps an `i32` but offers no way to read it back. Add a
trivial `id()` getter so callers that need to pass the node id to a
C binding can recover the underlying `c_int` without reaching into
the private field.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
---
Changes in v2:
- Rebase on v7.3-rc5.
- Add `#[inline]` attribute (Alice, Gary).
- Link to v1: https://msgid.link/20260608-numa-node-id-v1-1-28480299c62d@kernel.org
---
This will be used by an upcoming change that adds a home node parameter to
the block layer `TagSet::new()` constructor.
---
 rust/kernel/alloc.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/rust/kernel/alloc.rs b/rust/kernel/alloc.rs
index 21067bde6860..68d80f3fa6c8 100644
--- a/rust/kernel/alloc.rs
+++ b/rust/kernel/alloc.rs
@@ -130,6 +130,12 @@ pub fn new(node: i32) -> Result<Self> {
         }
         Ok(Self(node))
     }
+
+    /// Returns the raw NUMA node identifier as an `i32`.
+    #[inline]
+    pub fn id(&self) -> i32 {
+        self.0
+    }
 }
 
 /// Specify necessary constant to pass the information to Allocator that the caller doesn't care

---
base-commit: 72d3fcf802c45d00b300f25b848a93c3a2bd7c7e
change-id: 20260608-numa-node-id-85de708d4e8d

Best regards,
--  
Andreas Hindborg <a.hindborg@kernel.org>

Re: [PATCH v2] rust: alloc: add `NumaNode::id()` accessor

[Gary Guo]

On Tue Sep 29, 2026 at 4:18 PM BST, Andreas Hindborg wrote:
> `NumaNode` wraps an `i32` but offers no way to read it back. Add a
> trivial `id()` getter so callers that need to pass the node id to a
> C binding can recover the underlying `c_int` without reaching into
> the private field.
> 
> Reviewed-by: Alice Ryhl <aliceryhl@google.com>
> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>

Reviewed-by: Gary Guo <gary@garyguo.net>

> ---
> Changes in v2:
> - Rebase on v7.3-rc5.
> - Add `#[inline]` attribute (Alice, Gary).
> - Link to v1: https://msgid.link/20260608-numa-node-id-v1-1-28480299c62d@kernel.org
> ---
> This will be used by an upcoming change that adds a home node parameter to
> the block layer `TagSet::new()` constructor.
> ---
>  rust/kernel/alloc.rs | 6 ++++++
>  1 file changed, 6 insertions(+)

Re: [PATCH v2] rust: alloc: add `NumaNode::id()` accessor

[Danilo Krummrich]

On Tue, 29 Sep 2026 17:18:24 +0200, Andreas Hindborg wrote:
> [PATCH v2] rust: alloc: add `NumaNode::id()` accessor

Applied, thanks!

  Branch: alloc-next
  Tree:   git@github.com:Rust-for-Linux/linux.git

[1/1] rust: alloc: add `NumaNode::id()` accessor
      commit: 6e8339118040

The patch will appear in the next linux-next integration (typically within 24
hours on weekdays).

The patch is queued up for the upcoming merge window for the next major kernel
release.