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rust: init: use explicit ABI to clean warning in future compilers
commit c21bdb3 upstream. Starting with Rust 1.86.0 (currently in nightly, to be released on 2025-04-03), the `missing_abi` lint is warn-by-default [1]: error: extern declarations without an explicit ABI are deprecated --> rust/doctests_kernel_generated.rs:3158:1 | 3158 | extern { | ^^^^^^ help: explicitly specify the C ABI: `extern "C"` | = note: `-D missing-abi` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(missing_abi)]` Thus clean it up. Cc: <[email protected]> # Needed in 6.12.y and 6.13.y only (Rust is pinned in older LTSs). Fixes: 7f8977a ("rust: init: add `{pin_}chain` functions to `{Pin}Init<T, E>`") Link: rust-lang/rust#132397 [1] Reviewed-by: Gary Guo <[email protected]> Reviewed-by: Alice Ryhl <[email protected]> Reviewed-by: Fiona Behrens <[email protected]> Link: https://lore.kernel.org/r/[email protected] [ Added 6.13.y to Cc: stable tag. - Miguel ] Signed-off-by: Miguel Ojeda <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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rust/kernel/init.rs

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@@ -854,7 +854,7 @@ pub unsafe trait PinInit<T: ?Sized, E = Infallible>: Sized {
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/// use kernel::{types::Opaque, init::pin_init_from_closure};
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/// #[repr(C)]
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/// struct RawFoo([u8; 16]);
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/// extern {
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/// extern "C" {
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/// fn init_foo(_: *mut RawFoo);
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/// }
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///

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