#[export]Expand description
Export a function so that C code can call it via a header file.
Functions exported using this macro can be called from C code using the declaration in the
appropriate header file. It should only be used in cases where C calls the function through a
header file; cases where C calls into Rust via a function pointer in a vtable (such as
file_operations) should not use this macro.
This macro has the following effect:
- Disables name mangling for this function.
- Verifies at compile-time that the function signature matches the declaration in the header file.
You must declare the signature of the Rust function in a header file that is included by
rust/bindings/bindings_helper.h.
This macro is not the same as the C macros EXPORT_SYMBOL_*. All Rust symbols are currently
automatically exported with EXPORT_SYMBOL_GPL.