diff options
| author | Danilo Krummrich <dakr@kernel.org> | 2026-05-25 22:20:57 +0200 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-05-27 16:22:41 +0200 |
| commit | de12e48a1be3e9edc0f8bc6e37bad8f7b6f32d54 (patch) | |
| tree | c6c9bdec7bce1cd6198822a12753a6a0cc25942b /rust/kernel | |
| parent | 3bb1655192aeed68b761891eabdc97d9f2f7fc38 (diff) | |
rust: device: implement Sync for Device<Bound>
Implement Sync for Device<Bound> in addition to Device<Normal>.
Device<Bound> uses the same underlying struct device as Device<Normal>;
Bound is a zero-sized type-state marker that does not affect thread
safety.
This is needed for types that hold &'bound Device<Bound>, such as
io::mem::IoMem, to be Send.
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Uwe Kleine-König <ukleinek@kernel.org>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Link: https://patch.msgid.link/20260525202921.124698-11-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'rust/kernel')
| -rw-r--r-- | rust/kernel/device.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/rust/kernel/device.rs b/rust/kernel/device.rs index 5df8fa108a52..c4486f4b8c40 100644 --- a/rust/kernel/device.rs +++ b/rust/kernel/device.rs @@ -467,6 +467,10 @@ unsafe impl Send for Device {} // synchronization in `struct device`. unsafe impl Sync for Device {} +// SAFETY: Same as `Device<Normal>` -- the underlying `struct device` is the same; `Bound` is a +// zero-sized type-state marker that does not affect thread safety. +unsafe impl Sync for Device<Bound> {} + /// Marker trait for the context or scope of a bus specific device. /// /// [`DeviceContext`] is a marker trait for types representing the context of a bus specific |