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rust: workqueue: add #[pin_data] to Work

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The previous two patches made it possible to add `#[pin_data]` on
structs with default generic parameter values.
This patch makes `Work` use `#[pin_data]` and removes an invocation of
`pin_init_from_closure`. This function is intended as a low level manual
escape hatch, so it is better to rely on the safe `pin_init!` macro.

Signed-off-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Tested-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20240309155243.482334-3-benno.lossin@proton.me
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Benno Lossin 2024-03-09 15:54:52 +00:00 committed by Miguel Ojeda
parent 22eed6068d
commit 8db31d3f3b
1 changed files with 18 additions and 15 deletions
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33
rust/kernel/workqueue.rs
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@ -346,8 +346,10 @@ pub trait WorkItem<const ID: u64 = 0> {
/// This is a helper type used to associate a `work_struct` with the [`WorkItem`] that uses it.
///
/// [`run`]: WorkItemPointer::run
#[pin_data]
#[repr(transparent)]
pub struct Work<T: ?Sized, const ID: u64 = 0> {
#[pin]
work: Opaque<bindings::work_struct>,
_inner: PhantomData<T>,
}
@ -369,21 +371,22 @@ pub fn new(name: &'static CStr, key: &'static LockClassKey) -> impl PinInit<Self
where
T: WorkItem<ID>,
{
// SAFETY: The `WorkItemPointer` implementation promises that `run` can be used as the work
// item function.
unsafe {
kernel::init::pin_init_from_closure(move |slot| {
let slot = Self::raw_get(slot);
bindings::init_work_with_key(
slot,
Some(T::Pointer::run),
false,
name.as_char_ptr(),
key.as_ptr(),
);
Ok(())
})
}
pin_init!(Self {
work <- Opaque::ffi_init(|slot| {
// SAFETY: The `WorkItemPointer` implementation promises that `run` can be used as
// the work item function.
unsafe {
bindings::init_work_with_key(
slot,
Some(T::Pointer::run),
false,
name.as_char_ptr(),
key.as_ptr(),
)
}
}),
_inner: PhantomData,
})
}
/// Get a pointer to the inner `work_struct`.