diff options
| author | Alexandre Courbot <acourbot@nvidia.com> | 2025-11-10 22:34:16 +0900 |
|---|---|---|
| committer | Alexandre Courbot <acourbot@nvidia.com> | 2025-11-14 20:25:57 +0900 |
| commit | 88622323dde3d9d6efd6f2efcfaa0bced5af94c3 (patch) | |
| tree | 60b079f28129dc8da8df4619aef8b7d98d1bf21b /rust/kernel/prelude.rs | |
| parent | 6b5a10dad555310e44ff5f53f97e18be76b395ea (diff) | |
rust: enable slice_flatten feature and provide it through an extension trait
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>
Diffstat (limited to 'rust/kernel/prelude.rs')
| -rw-r--r-- | rust/kernel/prelude.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/rust/kernel/prelude.rs b/rust/kernel/prelude.rs index 198d09a31449..9ee8acc563de 100644 --- a/rust/kernel/prelude.rs +++ b/rust/kernel/prelude.rs @@ -51,3 +51,6 @@ pub use super::init::InPlaceInit; pub use super::current; pub use super::uaccess::UserPtr; + +#[cfg(not(CONFIG_RUSTC_HAS_SLICE_AS_FLATTENED))] +pub use super::slice::AsFlattened; |