samples/rust/rust_minimal.rs


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// SPDX-License-Identifier: GPL-2.0

//! Rust minimal sample.

use kernel::prelude::*;

module! {
    type: RustMinimal,
    name: b"rust_minimal",
    author: b"Rust for Linux Contributors",
    description: b"Rust minimal sample",
    license: b"GPL",
}

struct RustMinimal {
    message: String,
}

impl kernel::Module for RustMinimal {
    fn init(_name: &'static CStr, _module: &'static ThisModule) -> Result<Self> {
        pr_info!("Rust minimal sample (init)\n");
        pr_info!("Am I built-in? {}\n", !cfg!(MODULE));

        Ok(RustMinimal {
            message: "on the heap!".try_to_owned()?,
        })
    }
}

impl Drop for RustMinimal {
    fn drop(&mut self) {
        pr_info!("My message is {}\n", self.message);
        pr_info!("Rust minimal sample (exit)\n");
    }
}