[PATCH 7/9] rust: pin-init: use `kernel::{fmt,prelude::fmt!}`

[Benno Lossin]

On Wed Jul 9, 2025 at 11:01 PM CEST, Tamir Duberstein wrote:
> On Wed, Jul 9, 2025 at 4:18 PM Benno Lossin <lossin at kernel.org> wrote:
>>
>> On Wed Jul 9, 2025 at 10:00 PM CEST, Tamir Duberstein wrote:
>> > Reduce coupling to implementation details of the formatting machinery by
>> > avoiding direct use for `core`'s formatting traits and macros.
>> >
>> > Acked-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
>> > Reviewed-by: Alice Ryhl <aliceryhl at google.com>
>> > Signed-off-by: Tamir Duberstein <tamird at gmail.com>
>> > ---
>> >  rust/kernel/init.rs | 4 ++--
>> >  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> I usually prefix patches to init.rs with `rust: init`. I'll fix it up
>> when picking the patch or Miguel can do it if he takes it:
>>
>> Acked-by: Benno Lossin <lossin at kernel.org>
>
> Actually, squinting at this patch more closely now, I think this isn't
> what you had in mind. The comment says "Dummy error that can be
> constructed outside the `kernel` crate." but the error now comes from
> the kernel crate :(

It's a re-export, so the comment still holds.

> Perhaps you could suggest a different modification that would both
> meet the original intent and allow references to core::fmt to
> disappear?

The code comes from a time when `Error::from_errno` was `pub(crate)`,
but that was changed some time ago... Now we can just remove the
`FromErrno` trait entirely from that example. Feel free to do that in
this series or as a standalone patch.

---
Cheers,
Benno