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    Subject[PATCH v1 04/28] rust: samples: add `rust_print` example
    Date
    Add example to exercise the printing macros (`pr_*!`) introduced
    in the previous patches.

    Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
    ---
    samples/rust/Kconfig | 10 +++++++
    samples/rust/Makefile | 1 +
    samples/rust/rust_print.rs | 54 ++++++++++++++++++++++++++++++++++++++
    3 files changed, 65 insertions(+)
    create mode 100644 samples/rust/rust_print.rs

    diff --git a/samples/rust/Kconfig b/samples/rust/Kconfig
    index 841e0906e943..b0f74a81c8f9 100644
    --- a/samples/rust/Kconfig
    +++ b/samples/rust/Kconfig
    @@ -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
    diff --git a/samples/rust/Makefile b/samples/rust/Makefile
    index 1daba5f8658a..03086dabbea4 100644
    --- a/samples/rust/Makefile
    +++ b/samples/rust/Makefile
    @@ -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
    diff --git a/samples/rust/rust_print.rs b/samples/rust/rust_print.rs
    new file mode 100644
    index 000000000000..09f737790f3f
    --- /dev/null
    +++ b/samples/rust/rust_print.rs
    @@ -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");
    + }
    +}
    --
    2.38.1
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