[PATCH 1/6] rust: kernel: remove `fmt!`, fix clippy::uninlined-format-args

[Benno Lossin]

On Fri Jul 4, 2025 at 10:14 PM CEST, Tamir Duberstein wrote:
> Rather than export a macro that delegates to `core::format_args`, simply
> re-export `core::format_args` as `fmt` from the prelude. This exposes
> clippy warnings which were previously obscured by this macro, such as:
>
>     warning: variables can be used directly in the `format!` string
>       --> ../drivers/cpufreq/rcpufreq_dt.rs:21:43
>        |
>     21 |     let prop_name = CString::try_from_fmt(fmt!("{}-supply", name)).ok()?;
>        |                                           ^^^^^^^^^^^^^^^^^^^^^^^
>        |
>        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args
>        = note: `-W clippy::uninlined-format-args` implied by `-W clippy::all`
>        = help: to override `-W clippy::all` add `#[allow(clippy::uninlined_format_args)]`
>     help: change this to
>        |
>     21 -     let prop_name = CString::try_from_fmt(fmt!("{}-supply", name)).ok()?;
>     21 +     let prop_name = CString::try_from_fmt(fmt!("{name}-supply")).ok()?;
>        |
>
> Thus fix them in the same commit. This could possibly be fixed in two
> stages, but the diff is small enough (outside of kernel/str.rs) that I
> hope it can taken in a single commit.
>
> Signed-off-by: Tamir Duberstein <tamird at gmail.com>

Reviewed-by: Benno Lossin <lossin at kernel.org>

---
Cheers,
Benno

> ---
>  drivers/cpufreq/rcpufreq_dt.rs    |  3 +--
>  drivers/gpu/nova-core/firmware.rs |  5 +++--
>  rust/kernel/opp.rs                |  2 +-
>  rust/kernel/prelude.rs            |  2 +-
>  rust/kernel/str.rs                | 34 ++++++++++++++--------------------
>  5 files changed, 20 insertions(+), 26 deletions(-)