linux-kernel - Re: [PATCH] rust: kbuild: support `-Cjump-tables=n` for Rust 1.93.0

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Message-ID: <aQZCj5XZvXAt_lgl@levanger>
Date: Sat, 1 Nov 2025 18:25:35 +0100
From: Nicolas Schier <nsc@...nel.org>
To: Miguel Ojeda <ojeda@...nel.org>
Cc: Alex Gaynor <alex.gaynor@...il.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Huacai Chen <chenhuacai@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <lossin@...nel.org>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>, rust-for-linux@...r.kernel.org,
	linux-kbuild@...r.kernel.org, WANG Xuerui <kernel@...0n.name>,
	loongarch@...ts.linux.dev, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org, patches@...ts.linux.dev
Subject: Re: [PATCH] rust: kbuild: support `-Cjump-tables=n` for Rust 1.93.0

On Sat, Nov 01, 2025 at 10:40:11AM +0100, Miguel Ojeda wrote:
> Rust 1.93.0 (expected 2026-01-22) is stabilizing `-Zno-jump-tables`
> [1][2] as `-Cjump-tables=n` [3].
> 
> Without this change, one would eventually see:
> 
>       RUSTC L rust/core.o
>     error: unknown unstable option: `no-jump-tables`
> 
> Thus support the upcoming version.
> 
> Link: https://github.com/rust-lang/rust/issues/116592 [1]
> Link: https://github.com/rust-lang/rust/pull/105812 [2]
> Link: https://github.com/rust-lang/rust/pull/145974 [3]
> Signed-off-by: Miguel Ojeda <ojeda@...nel.org>
> ---
>  arch/loongarch/Makefile | 2 +-
>  arch/x86/Makefile       | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 

Acked-by: Nicolas Schier <nsc@...nel.org>

-- 
Nicolas