linux-kernel - Re: [PATCH v10 4/5] rust: replace `kernel::c

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Message-ID: <CAJ-ks9=gW_viqDMQwyVeGfT9821tfZ7w-4Tycd7e7bZ3xKwXRw@mail.gmail.com>
Date: Tue, 27 May 2025 11:31:32 -0400
From: Tamir Duberstein <tamird@...il.com>
To: Benno Lossin <lossin@...nel.org>
Cc: Michal Rostecki <vadorovsky@...tonmail.com>, Miguel Ojeda <ojeda@...nel.org>, 
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Subject: Re: [PATCH v10 4/5] rust: replace `kernel::c_str!` with C-Strings

On Mon, May 26, 2025 at 7:07 PM Benno Lossin <lossin@...nel.org> wrote:
>
> On Tue May 27, 2025 at 12:29 AM CEST, Tamir Duberstein wrote:
> > On Mon, May 26, 2025 at 11:04 AM Benno Lossin <lossin@...nel.org> wrote:
> >> On Sat May 24, 2025 at 10:33 PM CEST, Tamir Duberstein wrote:
> >> > +macro_rules! c_str_avoid_literals {
> >>
> >> I don't like this name, how about `concat_to_c_str` or
> >> `concat_with_nul`?
> >>
> >> This macro also is useful from macros that have a normal string literal,
> >> but can't turn it into a `c""` one.
> >
> > Uh, can you give an example? I'm not attached to the name.
>
> There is one in this patch (:
>
>     diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs
>     index e5621d596ed3..09148e982f48 100644
>     --- a/rust/kernel/kunit.rs
>     +++ b/rust/kernel/kunit.rs
>     @@ -58,9 +58,10 @@ macro_rules! kunit_assert {
>                      break 'out;
>                  }
>
>     -            static FILE: &'static $crate::str::CStr = $crate::c_str!($file);
>     +            static FILE: &'static $crate::str::CStr = $crate::c_str_avoid_literals!($file);

Great point, and an easy one to replace with a c-string literal. Done in v11.