diff options
| author | Danilo Krummrich <dakr@kernel.org> | 2026-05-25 22:20:56 +0200 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-05-27 16:22:41 +0200 |
| commit | 3bb1655192aeed68b761891eabdc97d9f2f7fc38 (patch) | |
| tree | 51fbdfac2f63653ca5f1bd028115338086038942 /rust/kernel | |
| parent | 5bbcefe8db74fe07681a9ded7c13362e3eaae54a (diff) | |
rust: usb: implement Sync for Device<Bound>
Implement Sync for Device<Bound> in addition to Device<Normal>.
Device<Bound> uses the same underlying struct usb_device as
Device<Normal>; Bound is a zero-sized type-state marker that does not
affect thread safety.
This is needed for drivers to store &'bound usb::Device<Bound> in their
private data while remaining 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/20260525202921.124698-10-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'rust/kernel')
| -rw-r--r-- | rust/kernel/usb.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/rust/kernel/usb.rs b/rust/kernel/usb.rs index 88721970afcb..6c917d8fa883 100644 --- a/rust/kernel/usb.rs +++ b/rust/kernel/usb.rs @@ -468,6 +468,10 @@ unsafe impl Send for Device {} // allow any mutation through a shared reference. unsafe impl Sync for Device {} +// SAFETY: Same as `Device<Normal>` -- the underlying `struct usb_device` is the same; +// `Bound` is a zero-sized type-state marker that does not affect thread safety. +unsafe impl Sync for Device<device::Bound> {} + /// Declares a kernel module that exposes a single USB driver. /// /// # Examples |