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In Rust 1.80, the previously unstable `slice::flatten` family of methods have been stabilized and renamed to `slice::as_flattened`. This creates an issue as we want to use `as_flattened`, but need to support the MSRV (which at the moment is Rust 1.78) where it is named `flatten`. Solve this by enabling the `slice_flatten` feature, and providing an `as_flattened` implementation through an extension trait for compiler versions where it is not available. The trait is then exported from the prelude, making the `as_flattened` family of methods transparently available for all supported compiler versions. This extension trait can be removed once the MSRV passes 1.80. Suggested-by: Miguel Ojeda <ojeda@kernel.org> Link: https://lore.kernel.org/all/CANiq72kK4pG=O35NwxPNoTO17oRcg1yfGcvr3==Fi4edr+sfmw@mail.gmail.com/ Acked-by: Danilo Krummrich <dakr@kernel.org> Acked-by: Miguel Ojeda <ojeda@kernel.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Message-ID: <20251110-gsp_boot-v9-8-8ae4058e3c0e@nvidia.com> Message-ID: <20251104-b4-as-flattened-v3-1-6cb9c26b45cd@nvidia.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.