rust: debugfs: use `kernel::fmt`

Reduce coupling to implementation details of the formatting machinery by
avoiding direct use for `core`'s formatting traits and macros.

This backslid in commit 40ecc49466c8 ("rust: debugfs: Add support for
callback-based files") and commit 5e40b591cb46 ("rust: debugfs: Add
support for read-only files").

Acked-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Matthew Maurer <mmaurer@google.com>
Signed-off-by: Tamir Duberstein <tamird@gmail.com>
Link: https://patch.msgid.link/20251018-cstr-core-v18-7-9378a54385f8@gmail.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/rust/kernel/debugfs/traits.rs b/rust/kernel/debugfs/traits.rs
index ab009eb254b3..ad33bfbc7669 100644
--- a/rust/kernel/debugfs/traits.rs
+++ b/rust/kernel/debugfs/traits.rs
@@ -3,10 +3,10 @@
 
 //! Traits for rendering or updating values exported to DebugFS.
 
+use crate::fmt;
 use crate::prelude::*;
 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,
@@ -24,17 +24,17 @@ 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:?}")
     }
 }