// SPDX-License-Identifier: GPL-2.0 //! Rust minimal sample. use kernel::prelude::*; module! {    type: RustMinimal,    name: "rust_minimal",    author: "Rust for Linux Contributors",    description: "Rust minimal sample",    license: "GPL",} struct RustMinimal {    numbers: KVec<i32>,} impl kernel::Module for RustMinimal {    fn init(_module: &'static ThisModule) -> Result<Self> {        pr_info!("Rust minimal sample (init)\n");        pr_info!("Am I built-in? {}\n", !cfg!(MODULE));         let mut numbers = KVec::new();        numbers.push(72, GFP_KERNEL)?;        numbers.push(108, GFP_KERNEL)?;        numbers.push(200, GFP_KERNEL)?;         Ok(RustMinimal { numbers })    }} impl Drop for RustMinimal {    fn drop(&mut self) {        pr_info!("My numbers are {:?}\n", self.numbers);        pr_info!("Rust minimal sample (exit)\n");    }}