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| author | Danilo Krummrich <dakr@kernel.org> | 2026-01-07 11:35:03 +0100 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-01-16 01:17:29 +0100 |
| commit | c1d4519e1c36ffa01973e23af4502e69dcd84f39 (patch) | |
| tree | 26e7f83683b1feefa4a9606cdde88143bffc770f /rust/kernel/usb.rs | |
| parent | 0af1a9e4629a85964a7eebe58ebd2ca37c8c21fc (diff) | |
| download | linux-next-c1d4519e1c36ffa01973e23af4502e69dcd84f39.tar.gz linux-next-c1d4519e1c36ffa01973e23af4502e69dcd84f39.zip | |
rust: driver: add DEVICE_DRIVER_OFFSET to the DriverLayout trait
Add an associated const DEVICE_DRIVER_OFFSET to the DriverLayout trait
indicating the offset of the embedded struct device_driver within
Self::DriverType, i.e. the specific driver structs, such as struct
pci_driver or struct platform_driver.
Acked-by: Alice Ryhl <aliceryhl@google.com>
Acked-by: Igor Korotin <igor.korotin.linux@gmail.com>
Link: https://patch.msgid.link/20260107103511.570525-5-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'rust/kernel/usb.rs')
| -rw-r--r-- | rust/kernel/usb.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/rust/kernel/usb.rs b/rust/kernel/usb.rs index 60b761c06fbd..eb1c9b9ef228 100644 --- a/rust/kernel/usb.rs +++ b/rust/kernel/usb.rs @@ -29,8 +29,11 @@ pub struct Adapter<T: Driver>(T); // SAFETY: // - `bindings::usb_driver` is a C type declared as `repr(C)`. +// - `struct usb_driver` embeds a `struct device_driver`. +// - `DEVICE_DRIVER_OFFSET` is the correct byte offset to the embedded `struct device_driver`. unsafe impl<T: Driver + 'static> driver::DriverLayout for Adapter<T> { type DriverType = bindings::usb_driver; + const DEVICE_DRIVER_OFFSET: usize = core::mem::offset_of!(Self::DriverType, driver); } // SAFETY: A call to `unregister` for a given instance of `DriverType` is guaranteed to be valid if |