Xiangfei Ding 47cb6bf786 rust: use derive(CoercePointee) on rustc >= 1.84.0 ... The `kernel` crate relies on both `coerce_unsized` and `dispatch_from_dyn` unstable features. Alice Ryhl has proposed [1] the introduction of the unstable macro `SmartPointer` to reduce such dependence, along with a RFC patch [2]. Since Rust 1.81.0 this macro, later renamed to `CoercePointee` in Rust 1.84.0 [3], has been fully implemented with the naming discussion resolved. This feature is now on track to stabilization in the language. In order to do so, we shall start using this macro in the `kernel` crate to prove the functionality and utility of the macro as the justification of its stabilization. This patch makes this switch in such a way that the crate remains backward compatible with older Rust compiler versions, via the new Kconfig option `RUSTC_HAS_COERCE_POINTEE`. A minimal demonstration example is added to the `samples/rust/rust_print_main.rs` module. Link: https://rust-lang.github.io/rfcs/3621-derive-smart-pointer.html [1] Link: https://lore.kernel.org/all/20240823-derive-smart-pointer-v1-1-53769cd37239@google.com/ [2] Link: https://github.com/rust-lang/rust/pull/131284 [3] Signed-off-by: Xiangfei Ding <dingxiangfei2009@gmail.com> Reviewed-by: Fiona Behrens <me@kloenk.dev> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Link: https://lore.kernel.org/r/20241203205050.679106-2-dingxiangfei2009@gmail.com [ Fixed version to 1.84. Renamed option to `RUSTC_HAS_COERCE_POINTEE` to match `CC_HAS_*` ones. Moved up new config option, closer to the `CC_HAS_*` ones. Simplified Kconfig line. Fixed typos and slightly reworded example and commit. Added Link to PR. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>		2025-01-13 23:45:30 +01:00
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arc	rust: provide proper code documentation titles	2024-10-07 21:39:57 +02:00
lock	rust: use custom FFI integer types	2024-11-10 23:58:00 +01:00
arc.rs	rust: use derive(CoercePointee) on rustc >= 1.84.0	2025-01-13 23:45:30 +01:00
condvar.rs	rust: use custom FFI integer types	2024-11-10 23:58:00 +01:00
lock.rs	Rust changes for v6.13	2024-11-26 14:00:26 -08:00
locked_by.rs	rust: treewide: switch to the kernel Vec type	2024-10-15 23:10:32 +02:00
poll.rs	rust: file: add abstraction for poll_table	2024-09-30 13:02:29 +02:00