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| author | Alice Ryhl <aliceryhl@google.com> | 2025-12-03 14:48:08 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-12-29 12:11:32 +0100 |
| commit | c1093b85890693fa2d372468f279854c3624d2b1 (patch) | |
| tree | dc1601bddf2c974a0e08d21ef949dc663b077806 /rust/kernel/sync | |
| parent | 0c4ce29612bcd1f74d924cbc4abd133dc002e5e6 (diff) | |
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: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Link: https://patch.msgid.link/20251203-binder-trace1-v1-1-22d3ffddb44e@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'rust/kernel/sync')
| -rw-r--r-- | rust/kernel/sync/arc.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs index 289f77abf415..921e19333b89 100644 --- a/rust/kernel/sync/arc.rs +++ b/rust/kernel/sync/arc.rs @@ -240,6 +240,9 @@ impl<T> Arc<T> { // `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> { |