linux-kernel - Re: [PATCH v4 1/2] rust: Introduce file_from

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Message-ID: <aFR4NHiCvvFxvP1D@tardis.local>
Date: Thu, 19 Jun 2025 13:51:00 -0700
From: Boqun Feng <boqun.feng@...il.com>
To: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc: linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org,
	ojeda@...nel.org, alex.gaynor@...il.com, gary@...yguo.net,
	bjorn3_gh@...tonmail.com, benno.lossin@...ton.me,
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	dakr@...nel.org, mingo@...hat.com, peterz@...radead.org,
	juri.lelli@...hat.com, vincent.guittot@...aro.org,
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	mgorman@...e.de, vschneid@...hat.com, pmladek@...e.com,
	fujita.tomonori@...il.com, mingo@...nel.org, tamird@...il.com
Subject: Re: [PATCH v4 1/2] rust: Introduce file_from_location()

On Thu, Jun 19, 2025 at 10:42:44PM +0200, Miguel Ojeda wrote:
> On Thu, Jun 19, 2025 at 5:10 PM Boqun Feng <boqun.feng@...il.com> wrote:
> >
> > +///     // - A path like "rust/kernel/example.rs" if file_with_nul() available.
> 
> "is available."
> 

Fixed.

> > +pub fn file_from_location<'a>(_loc: &'a core::panic::Location<'a>) -> &'a core::ffi::CStr {
> > +    #[cfg(CONFIG_RUSTC_HAS_FILE_WITH_NUL)]
> > +    { _loc.file_with_nul() }
> > +
> > +    #[cfg(not(CONFIG_RUSTC_HAS_FILE_WITH_NUL))]
> > +    { c"<Location::file_with_nul() not supported>" }
> > +}
> 
> If a `let _` works, then it may be better -- please see a similar case at:
> 
>     https://lore.kernel.org/rust-for-linux/CANiq72=ph_XG0TtkdsNJCUZMiAMYBo11eJaCTLCTpTAFXtcNMA@mail.gmail.com/
> 

Make sense, applied.

> The new version looks great, thanks!
> 

Thanks! I pushed the updated version at:

	https://git.kernel.org/pub/scm/linux/kernel/git/boqun/linux.git/log/?h=rust-sched-v2

"-v2" because it's going to be a v2 of the pull request.

Regards,
Boqun

> Cheers,
> Miguel