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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>
57 lines
1.5 KiB
Rust
57 lines
1.5 KiB
Rust
// SPDX-License-Identifier: GPL-2.0
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//! The `kernel` prelude.
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//!
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//! These are the most common items used by Rust code in the kernel,
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//! intended to be imported by all Rust code, for convenience.
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//!
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//! # Examples
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//!
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//! ```
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//! use kernel::prelude::*;
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//! ```
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#[doc(no_inline)]
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pub use core::{
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mem::{align_of, align_of_val, size_of, size_of_val},
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pin::Pin,
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};
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pub use ::ffi::{
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c_char, c_int, c_long, c_longlong, c_schar, c_short, c_uchar, c_uint, c_ulong, c_ulonglong,
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c_ushort, c_void,
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};
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pub use crate::alloc::{flags::*, Box, KBox, KVBox, KVVec, KVec, VBox, VVec, Vec};
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#[doc(no_inline)]
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pub use macros::{export, kunit_tests, module, vtable};
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pub use pin_init::{init, pin_data, pin_init, pinned_drop, InPlaceWrite, Init, PinInit, Zeroable};
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pub use super::{build_assert, build_error};
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// `super::std_vendor` is hidden, which makes the macro inline for some reason.
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#[doc(no_inline)]
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pub use super::dbg;
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pub use super::{dev_alert, dev_crit, dev_dbg, dev_emerg, dev_err, dev_info, dev_notice, dev_warn};
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pub use super::{pr_alert, pr_crit, pr_debug, pr_emerg, pr_err, pr_info, pr_notice, pr_warn};
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pub use core::format_args as fmt;
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pub use super::{try_init, try_pin_init};
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pub use super::static_assert;
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pub use super::error::{code::*, Error, Result};
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pub use super::{str::CStr, ThisModule};
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pub use super::init::InPlaceInit;
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pub use super::current;
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pub use super::uaccess::UserPtr;
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#[cfg(not(CONFIG_RUSTC_HAS_SLICE_AS_FLATTENED))]
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pub use super::slice::AsFlattened;
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