Commit c1093b85 authored by Alice Ryhl's avatar Alice Ryhl Committed by Greg Kroah-Hartman
Browse files

rust: sync: add Arc::DATA_OFFSET 



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: default avatarAlice Ryhl <aliceryhl@google.com>
Reviewed-by: default avatarDaniel Almeida <daniel.almeida@collabora.com>
Link: https://patch.msgid.link/20251203-binder-trace1-v1-1-22d3ffddb44e@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0c4ce296

rust/kernel/sync/arc.rs

+3 −0
Original line number Diff line number Diff line
@@ -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> {