Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
30 lines
945 B
Rust
30 lines
945 B
Rust
// SPDX-License-Identifier: GPL-2.0
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use crate::helpers::function_name;
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use proc_macro::TokenStream;
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/// Please see [`crate::export`] for documentation.
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pub(crate) fn export(_attr: TokenStream, ts: TokenStream) -> TokenStream {
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let Some(name) = function_name(ts.clone()) else {
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return "::core::compile_error!(\"The #[export] attribute must be used on a function.\");"
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.parse::<TokenStream>()
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.unwrap();
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};
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// This verifies that the function has the same signature as the declaration generated by
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// bindgen. It makes use of the fact that all branches of an if/else must have the same type.
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let signature_check = quote!(
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const _: () = {
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if true {
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::kernel::bindings::#name
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} else {
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#name
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};
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};
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);
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let no_mangle = quote!(#[no_mangle]);
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TokenStream::from_iter([signature_check, no_mangle, ts])
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}
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