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rust: samples: add rust_print example

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Add example to exercise the printing macros (`pr_*!`) introduced
in the previous patches.

Reviewed-by: Finn Behrens <me@kloenk.dev>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Tested-by: Sergio González Collado <sergio.collado@gmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Miguel Ojeda 2022-11-10 17:41:16 +01:00
parent fc6c7cac83
commit c3630df66f
3 changed files with 65 additions and 0 deletions
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10
samples/rust/Kconfig
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@ -20,6 +20,16 @@ config SAMPLE_RUST_MINIMAL
If unsure, say N.
config SAMPLE_RUST_PRINT
tristate "Printing macros"
help
This option builds the Rust printing macros sample.
To compile this as a module, choose M here:
the module will be called rust_print.
If unsure, say N.
config SAMPLE_RUST_HOSTPROGS
bool "Host programs"
help

1
samples/rust/Makefile
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@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_SAMPLE_RUST_MINIMAL) += rust_minimal.o
obj-$(CONFIG_SAMPLE_RUST_PRINT) += rust_print.o
subdir-$(CONFIG_SAMPLE_RUST_HOSTPROGS) += hostprogs

54
samples/rust/rust_print.rs Normal file
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@ -0,0 +1,54 @@
// SPDX-License-Identifier: GPL-2.0
//! Rust printing macros sample.
use kernel::pr_cont;
use kernel::prelude::*;
module! {
type: RustPrint,
name: b"rust_print",
author: b"Rust for Linux Contributors",
description: b"Rust printing macros sample",
license: b"GPL",
}
struct RustPrint;
impl kernel::Module for RustPrint {
fn init(_module: &'static ThisModule) -> Result<Self> {
pr_info!("Rust printing macros sample (init)\n");
pr_emerg!("Emergency message (level 0) without args\n");
pr_alert!("Alert message (level 1) without args\n");
pr_crit!("Critical message (level 2) without args\n");
pr_err!("Error message (level 3) without args\n");
pr_warn!("Warning message (level 4) without args\n");
pr_notice!("Notice message (level 5) without args\n");
pr_info!("Info message (level 6) without args\n");
pr_info!("A line that");
pr_cont!(" is continued");
pr_cont!(" without args\n");
pr_emerg!("{} message (level {}) with args\n", "Emergency", 0);
pr_alert!("{} message (level {}) with args\n", "Alert", 1);
pr_crit!("{} message (level {}) with args\n", "Critical", 2);
pr_err!("{} message (level {}) with args\n", "Error", 3);
pr_warn!("{} message (level {}) with args\n", "Warning", 4);
pr_notice!("{} message (level {}) with args\n", "Notice", 5);
pr_info!("{} message (level {}) with args\n", "Info", 6);
pr_info!("A {} that", "line");
pr_cont!(" is {}", "continued");
pr_cont!(" with {}\n", "args");
Ok(RustPrint)
}
}
impl Drop for RustPrint {
fn drop(&mut self) {
pr_info!("Rust printing macros sample (exit)\n");
}
}