Re: [PATCH 08/22] rust: pin-init: move `InPlaceInit` and impls of `InPlaceWrite` into the kernel crate

[Andreas Hindborg <a.hindborg@kernel.org>]

"Benno Lossin" <benno.lossin@proton.me> writes:

> On Wed Mar 5, 2025 at 12:18 PM CET, Andreas Hindborg wrote:
>> "Benno Lossin" <benno.lossin@proton.me> writes:
>>
>>> In order to make pin-init a standalone crate, move kernel-specific code
>>> directly into the kernel crate. This includes the `InPlaceInit<T>`
>>> trait, its implementations and the implementations of `InPlaceWrite` for
>>> `Arc` and `UniqueArc`. All of these use the kernel's error type which
>>> will become unavailable in pin-init.
>>>
>>> Signed-off-by: Benno Lossin <benno.lossin@proton.me>
>>> ---
>>>  rust/kernel/alloc/kbox.rs |   3 +-
>>>  rust/kernel/init.rs       |  55 +++++++++++++++++
>>>  rust/kernel/prelude.rs    |   3 +-
>>>  rust/kernel/sync/arc.rs   |  65 +++++++++++++++++++-
>>>  rust/pin-init/src/lib.rs  | 125 ++------------------------------------
>>>  5 files changed, 127 insertions(+), 124 deletions(-)
>>>
>>
>> [...]
>>
>>> --- a/rust/pin-init/src/lib.rs
>>> +++ b/rust/pin-init/src/lib.rs
>>> @@ -10,7 +10,7 @@
>>>  //! To initialize a `struct` with an in-place constructor you will need two things:
>>>  //! - an in-place constructor,
>>>  //! - a memory location that can hold your `struct` (this can be the [stack], an [`Arc<T>`],
>>> -//!   [`UniqueArc<T>`], [`KBox<T>`] or any other smart pointer that implements [`InPlaceInit`]).
>>> +//!   [`KBox<T>`] or any other smart pointer that supports this library).
>>
>> Would you not want to remove references to `KBox` here as well? Even
>> though you don't have to move the impl, I don't imagine `KBox` exist in
>> user space?
>
> Yes, this is done in "rust: pin-init: fix documentation links".

Yea, maybe I should have read the entire thing before firing off emails.


Best regards,
Andreas Hindborg