4 files changed, 30 insertions, 50 deletions

diff --git a/rust/kernel/debugfs/callback_adapters.rs b/rust/kernel/debugfs/callback_adapters.rs
index 6c024230f676..a260d8dee051 100644
--- a/rust/kernel/debugfs/callback_adapters.rs
+++ b/rust/kernel/debugfs/callback_adapters.rs
@@ -5,10 +5,9 @@
 //! than a trait implementation. If provided, it will override the trait implementation.
 
 use super::{Reader, Writer};
+use crate::fmt;
 use crate::prelude::*;
 use crate::uaccess::UserSliceReader;
-use core::fmt;
-use core::fmt::Formatter;
 use core::marker::PhantomData;
 use core::ops::Deref;
 
@@ -76,9 +75,9 @@ impl<D, F> Deref for FormatAdapter<D, F> {
 
 impl<D, F> Writer for FormatAdapter<D, F>
 where
-    F: Fn(&D, &mut Formatter<'_>) -> fmt::Result + 'static,
+    F: Fn(&D, &mut fmt::Formatter<'_>) -> fmt::Result + 'static,
 {
-    fn write(&self, fmt: &mut Formatter<'_>) -> fmt::Result {
+    fn write(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
         // SAFETY: FormatAdapter<_, F> can only be constructed if F is inhabited
         let f: &F = unsafe { materialize_zst() };
         f(&self.inner, fmt)
diff --git a/rust/kernel/debugfs/entry.rs b/rust/kernel/debugfs/entry.rs
index f99402cd3ba0..706cb7f73d6c 100644
--- a/rust/kernel/debugfs/entry.rs
+++ b/rust/kernel/debugfs/entry.rs
@@ -3,7 +3,7 @@
 
 use crate::debugfs::file_ops::FileOps;
 use crate::ffi::c_void;
-use crate::str::CStr;
+use crate::str::{CStr, CStrExt as _};
 use crate::sync::Arc;
 use core::marker::PhantomData;
 
diff --git a/rust/kernel/debugfs/file_ops.rs b/rust/kernel/debugfs/file_ops.rs
index 50fead17b6f3..9ad5e3fa6f69 100644
--- a/rust/kernel/debugfs/file_ops.rs
+++ b/rust/kernel/debugfs/file_ops.rs
@@ -3,11 +3,11 @@
 
 use super::{Reader, Writer};
 use crate::debugfs::callback_adapters::Adapter;
+use crate::fmt;
 use crate::prelude::*;
 use crate::seq_file::SeqFile;
 use crate::seq_print;
 use crate::uaccess::UserSlice;
-use core::fmt::{Display, Formatter, Result};
 use core::marker::PhantomData;
 
 #[cfg(CONFIG_DEBUG_FS)]
@@ -65,8 +65,8 @@ impl<T> Deref for FileOps<T> {
 
 struct WriterAdapter<T>(T);
 
-impl<'a, T: Writer> Display for WriterAdapter<&'a T> {
-    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+impl<'a, T: Writer> fmt::Display for WriterAdapter<&'a T> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.write(f)
     }
 }
diff --git a/rust/kernel/debugfs/traits.rs b/rust/kernel/debugfs/traits.rs
index ab009eb254b3..e8a8a98f18dc 100644
--- a/rust/kernel/debugfs/traits.rs
+++ b/rust/kernel/debugfs/traits.rs
@@ -3,15 +3,12 @@
 
 //! Traits for rendering or updating values exported to DebugFS.
 
+use crate::fmt;
 use crate::prelude::*;
+use crate::sync::atomic::{Atomic, AtomicBasicOps, AtomicType, Relaxed};
 use crate::sync::Mutex;
 use crate::uaccess::UserSliceReader;
-use core::fmt::{self, Debug, Formatter};
 use core::str::FromStr;
-use core::sync::atomic::{
-    AtomicI16, AtomicI32, AtomicI64, AtomicI8, AtomicIsize, AtomicU16, AtomicU32, AtomicU64,
-    AtomicU8, AtomicUsize, Ordering,
-};
 
 /// A trait for types that can be written into a string.
 ///
@@ -24,17 +21,17 @@ use core::sync::atomic::{
 /// explicitly instead.
 pub trait Writer {
     /// Formats the value using the given formatter.
-    fn write(&self, f: &mut Formatter<'_>) -> fmt::Result;
+    fn write(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result;
 }
 
 impl<T: Writer> Writer for Mutex<T> {
-    fn write(&self, f: &mut Formatter<'_>) -> fmt::Result {
+    fn write(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.lock().write(f)
     }
 }
 
-impl<T: Debug> Writer for T {
-    fn write(&self, f: &mut Formatter<'_>) -> fmt::Result {
+impl<T: fmt::Debug> Writer for T {
+    fn write(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(f, "{self:?}")
     }
 }
@@ -50,7 +47,7 @@ pub trait Reader {
     fn read_from_slice(&self, reader: &mut UserSliceReader) -> Result;
 }
 
-impl<T: FromStr> Reader for Mutex<T> {
+impl<T: FromStr + Unpin> Reader for Mutex<T> {
     fn read_from_slice(&self, reader: &mut UserSliceReader) -> Result {
         let mut buf = [0u8; 128];
         if reader.len() > buf.len() {
@@ -66,37 +63,21 @@ impl<T: FromStr> Reader for Mutex<T> {
     }
 }
 
-macro_rules! impl_reader_for_atomic {
-    ($(($atomic_type:ty, $int_type:ty)),*) => {
-        $(
-            impl Reader for $atomic_type {
-                fn read_from_slice(&self, reader: &mut UserSliceReader) -> Result {
-                    let mut buf = [0u8; 21]; // Enough for a 64-bit number.
-                    if reader.len() > buf.len() {
-                        return Err(EINVAL);
-                    }
-                    let n = reader.len();
-                    reader.read_slice(&mut buf[..n])?;
+impl<T: AtomicType + FromStr> Reader for Atomic<T>
+where
+    T::Repr: AtomicBasicOps,
+{
+    fn read_from_slice(&self, reader: &mut UserSliceReader) -> Result {
+        let mut buf = [0u8; 21]; // Enough for a 64-bit number.
+        if reader.len() > buf.len() {
+            return Err(EINVAL);
+        }
+        let n = reader.len();
+        reader.read_slice(&mut buf[..n])?;
 
-                    let s = core::str::from_utf8(&buf[..n]).map_err(|_| EINVAL)?;
-                    let val = s.trim().parse::<$int_type>().map_err(|_| EINVAL)?;
-                    self.store(val, Ordering::Relaxed);
-                    Ok(())
-                }
-            }
-        )*
-    };
+        let s = core::str::from_utf8(&buf[..n]).map_err(|_| EINVAL)?;
+        let val = s.trim().parse::<T>().map_err(|_| EINVAL)?;
+        self.store(val, Relaxed);
+        Ok(())
+    }
 }
-
-impl_reader_for_atomic!(
-    (AtomicI16, i16),
-    (AtomicI32, i32),
-    (AtomicI64, i64),
-    (AtomicI8, i8),
-    (AtomicIsize, isize),
-    (AtomicU16, u16),
-    (AtomicU32, u32),
-    (AtomicU64, u64),
-    (AtomicU8, u8),
-    (AtomicUsize, usize)
-);