linux-kernel - Re: [PATCH v3 1/2] rust: Introduce file_from

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Message-ID: <aFE0pjPsuB0gBgvT@google.com>
Date: Tue, 17 Jun 2025 09:25:58 +0000
From: Alice Ryhl <aliceryhl@...gle.com>
To: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc: Boqun Feng <boqun.feng@...il.com>, 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, 
	a.hindborg@...sung.com, tmgross@...ch.edu, dakr@...nel.org, mingo@...hat.com, 
	peterz@...radead.org, juri.lelli@...hat.com, vincent.guittot@...aro.org, 
	dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com, 
	mgorman@...e.de, vschneid@...hat.com, pmladek@...e.com, 
	fujita.tomonori@...il.com, mingo@...nel.org
Subject: Re: [PATCH v3 1/2] rust: Introduce file_from_location()

On Mon, Jun 16, 2025 at 11:19:52PM +0200, Miguel Ojeda wrote:
> On Mon, Jun 16, 2025 at 5:36 PM Boqun Feng <boqun.feng@...il.com> wrote:
> >
> > introduce a file_from_location() function, which return a warning string
> 
> returns
> 
> >  #![cfg_attr(not(CONFIG_RUSTC_HAS_COERCE_POINTEE), feature(coerce_unsized))]
> >  #![cfg_attr(not(CONFIG_RUSTC_HAS_COERCE_POINTEE), feature(dispatch_from_dyn))]
> >  #![cfg_attr(not(CONFIG_RUSTC_HAS_COERCE_POINTEE), feature(unsize))]
> > +#![cfg_attr(CONFIG_RUSTC_HAS_LOCATION_FILE_WITH_NUL, feature(file_with_nul))]
> 
> I would change the config name to `CONFIG_RUSTC_HAS_FILE_WITH_NUL`
> since that is the actual name, i.e. without "location".

We will need to coordinate with
https://github.com/rust-lang/rust/pull/142579

> By the way, please add a comment on top, like the others, i.e. something like:
> 
>     //
>     // `feature(file_with_nul)` is expected to become stable. Before Rust
>     // 1.89.0, it did not exist, so enable it conditionally.
> 
> Alice: the tracking issue uses the wrong name, i.e. with the
> `location_*` prefix.

Fixed.

Alice