> On 3 Dec 2025, at 08:48, Alice Ryhl <[email protected]> wrote:
>
> This constant will be used to expose some offset constants from the Rust
> Binder driver to tracepoints which are implemented in C. The constant is
> usually equal to sizeof(refcount_t), but may be larger if T has a large
> alignment.
>
> Signed-off-by: Alice Ryhl <[email protected]>
> ---
> rust/kernel/sync/arc.rs | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs
> index
> 289f77abf415a2a52e039a2c0291413eda01217c..921e19333b895f0d971591c4753047d0248a3029
> 100644
> --- a/rust/kernel/sync/arc.rs
> +++ b/rust/kernel/sync/arc.rs
> @@ -240,6 +240,9 @@ pub fn new(contents: T, flags: Flags) -> Result<Self,
> AllocError> {
> // `Arc` object.
> Ok(unsafe { Self::from_inner(inner) })
> }
> +
> + /// The offset that the value is stored at.
> + pub const DATA_OFFSET: usize = core::mem::offset_of!(ArcInner<T>, data);
> }
>
> impl<T: ?Sized> Arc<T> {
>
> --
> 2.52.0.158.g65b55ccf14-goog
>
>
Reviewed-by: Daniel Almeida <[email protected]>
