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rust: debugfs: Use kernel Atomic type in docs example

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Switch the read_callback_file() documentation example from
core::sync::atomic::AtomicU32 to the kernel's Atomic because Rust
native atomics are not allowed to use in kernel.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://patch.msgid.link/20251203000411.30434-1-fujita.tomonori@gmail.com
[ Use kernel vertical import style. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
This commit is contained in:
FUJITA Tomonori 2025-12-03 09:04:11 +09:00 • committed by Danilo Krummrich
parent 61f5ec54c8
commit 7449057051
1 changed files with 11 additions and 6 deletions
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17
rust/kernel/debugfs.rs
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@ -207,20 +207,25 @@ impl Dir {
/// # Examples
///
/// ```
/// # use core::sync::atomic::{AtomicU32, Ordering};
/// # use kernel::debugfs::Dir;
/// # use kernel::prelude::*;
/// # use kernel::{
/// # debugfs::Dir,
/// # prelude::*,
/// # sync::atomic::{
/// # Atomic,
/// # Relaxed,
/// # },
/// # };
/// # let dir = Dir::new(c"foo");
/// let file = KBox::pin_init(
/// dir.read_callback_file(c"bar",
/// AtomicU32::new(3),
/// Atomic::<u32>::new(3),
/// &|val, f| {
/// let out = val.load(Ordering::Relaxed);
/// let out = val.load(Relaxed);
/// writeln!(f, "{out:#010x}")
/// }),
/// GFP_KERNEL)?;
/// // Reading "foo/bar" will show "0x00000003".
/// file.store(10, Ordering::Relaxed);
/// file.store(10, Relaxed);
/// // Reading "foo/bar" will now show "0x0000000a".
/// # Ok::<(), Error>(())
/// ```