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Sometimes it is necessary to split allocation and initialization into two steps. One such situation is when reusing existing allocations obtained via `Box::drop_contents`. See [1] for an example. In order to support this use case add `write_[pin_]init` functions to the pin-init API. These functions operate on already allocated smart pointers that wrap `MaybeUninit<T>`. Link: https://lore.kernel.org/rust-for-linux/f026532f-8594-4f18-9aa5-57ad3f5bc592@proton.me/ [1] Signed-off-by: Benno Lossin <benno.lossin@proton.me> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> Link: https://lore.kernel.org/r/20240819112415.99810-2-benno.lossin@proton.me Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
43 lines
1.0 KiB
Rust
43 lines
1.0 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::pin::Pin;
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pub use crate::alloc::{box_ext::BoxExt, flags::*, vec_ext::VecExt};
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#[doc(no_inline)]
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pub use alloc::{boxed::Box, vec::Vec};
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#[doc(no_inline)]
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pub use macros::{module, pin_data, pinned_drop, vtable, Zeroable};
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pub use super::build_assert;
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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::{pr_alert, pr_crit, pr_debug, pr_emerg, pr_err, pr_info, pr_notice, pr_warn};
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pub use super::{init, pin_init, 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, InPlaceWrite, Init, PinInit};
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pub use super::current;
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