On Wed Apr 1, 2026 at 12:45 PM BST, Miguel Ojeda wrote:
> As proposed in the past in e.g. LPC 2025 and the Maintainers Summit [1],
> we are going to follow Debian Stable's Rust versions as our minimum
> supported version.
>
> Debian Trixie was released with a Rust 1.85.0 toolchain [2], which it
> still uses to this day [3] (i.e. no update to Rust 1.85.1).
>
> Debian Trixie's release happened on 2025-08-09 [4], which means that a
> fair amount of time has passed since its release for kernel developers
> to upgrade.
>
> Thus bump the minimum to the new version.
>
> Then, in later commits, clean up most of the workarounds and other bits
> that this upgrade of the minimum allows us.
>
> pin-init was left as-is since the patches come from upstream. And the
> vendored crates are unmodified, since we do not want to change those.
>
> Note that the minimum LLVM major version for Rust 1.85.0 is LLVM 18 (the
> Rust upstream binaries use LLVM 19.1.7), thus e.g. `RUSTC_LLVM_VERSION`
> tests can also be updated, but there are no suitable ones to simplify.
>
> Ubuntu 25.10 also has a recent enough Rust toolchain [5], and they also
> provide versioned packages with a Rust 1.85.1 toolchain even back to
> Ubuntu 22.04 LTS [6].
>
> Link: https://lwn.net/Articles/1050174/ [1]
> Link:
> https://www.debian.org/releases/trixie/release-notes/whats-new.en.html#desktops-and-well-known-packages
> [2]
> Link: https://packages.debian.org/trixie/rustc [3]
> Link: https://www.debian.org/releases/trixie/ [4]
> Link:
> https://packages.ubuntu.com/search?suite=all&searchon=names&keywords=rustc [5]
> Link: https://launchpad.net/ubuntu/+source/rustc-1.85 [6]
> Signed-off-by: Miguel Ojeda <[email protected]>
> ---
> Documentation/process/changes.rst | 2 +-
> scripts/min-tool-version.sh | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/process/changes.rst
> b/Documentation/process/changes.rst
> index 6b373e193548..474594bd4831 100644
> --- a/Documentation/process/changes.rst
> +++ b/Documentation/process/changes.rst
This diff fails to apply on linux-next, due to conflict with ece7e57afd51
("docs: changes.rst and ver_linux: sort the lists").
Best,
Gary
> @@ -31,7 +31,7 @@ you probably needn't concern yourself with pcmciautils.
> ====================== ===============
> ========================================
> GNU C 8.1 gcc --version
> Clang/LLVM (optional) 15.0.0 clang --version
> -Rust (optional) 1.78.0 rustc --version
> +Rust (optional) 1.85.0 rustc --version
> bindgen (optional) 0.65.1 bindgen --version
> GNU make 4.0 make --version
> bash 4.2 bash --version
> diff --git a/scripts/min-tool-version.sh b/scripts/min-tool-version.sh
> index 99b5575c1ef7..a270ec761f64 100755
> --- a/scripts/min-tool-version.sh
> +++ b/scripts/min-tool-version.sh
> @@ -31,7 +31,7 @@ llvm)
> fi
> ;;
> rustc)
> - echo 1.78.0
> + echo 1.85.0
> ;;
> bindgen)
> echo 0.65.1
