linux-kernel - [PATCH 2/9] rust: alloc: use `kernel::{fmt,prelude::fmt!}`

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Message-Id: <20250709-core-cstr-fanout-1-v1-2-64308e7203fc@gmail.com>
Date: Wed, 09 Jul 2025 16:00:01 -0400
From: Tamir Duberstein <tamird@...il.com>
To: Danilo Krummrich <dakr@...nel.org>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>, Miguel Ojeda <ojeda@...nel.org>, 
 Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
 Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
 Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, 
 Jens Axboe <axboe@...nel.dk>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, 
 Brendan Higgins <brendan.higgins@...ux.dev>, 
 David Gow <davidgow@...gle.com>, Rae Moar <rmoar@...gle.com>
Cc: nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, 
 linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org, 
 linux-block@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 kunit-dev@...glegroups.com, Tamir Duberstein <tamird@...il.com>
Subject: [PATCH 2/9] rust: alloc: use `kernel::{fmt,prelude::fmt!}`

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

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>
Signed-off-by: Tamir Duberstein <tamird@...il.com>
---
 rust/kernel/alloc/kbox.rs        | 2 +-
 rust/kernel/alloc/kvec.rs        | 2 +-
 rust/kernel/alloc/kvec/errors.rs | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/rust/kernel/alloc/kbox.rs b/rust/kernel/alloc/kbox.rs
index ccf1df7da96c..96db3cf8d782 100644
--- a/rust/kernel/alloc/kbox.rs
+++ b/rust/kernel/alloc/kbox.rs
@@ -7,7 +7,6 @@
 use super::{AllocError, Allocator, Flags};
 use core::alloc::Layout;
 use core::borrow::{Borrow, BorrowMut};
-use core::fmt;
 use core::marker::PhantomData;
 use core::mem::ManuallyDrop;
 use core::mem::MaybeUninit;
@@ -16,6 +15,7 @@
 use core::ptr::NonNull;
 use core::result::Result;

+use crate::fmt;
 use crate::init::InPlaceInit;
 use crate::types::ForeignOwnable;
 use pin_init::{InPlaceWrite, Init, PinInit, ZeroableOption};
diff --git a/rust/kernel/alloc/kvec.rs b/rust/kernel/alloc/kvec.rs
index 0477041cbc03..a642bdc9cea2 100644
--- a/rust/kernel/alloc/kvec.rs
+++ b/rust/kernel/alloc/kvec.rs
@@ -7,8 +7,8 @@
     layout::ArrayLayout,
     AllocError, Allocator, Box, Flags,
 };
+use crate::fmt;
 use core::{
-    fmt,
     marker::PhantomData,
     mem::{ManuallyDrop, MaybeUninit},
     ops::Deref,
diff --git a/rust/kernel/alloc/kvec/errors.rs b/rust/kernel/alloc/kvec/errors.rs
index 348b8d27e102..21a920a4b09b 100644
--- a/rust/kernel/alloc/kvec/errors.rs
+++ b/rust/kernel/alloc/kvec/errors.rs
@@ -2,7 +2,7 @@

 //! Errors for the [`Vec`] type.

-use core::fmt::{self, Debug, Formatter};
+use kernel::fmt::{self, Debug, Formatter};
 use kernel::prelude::*;

 /// Error type for [`Vec::push_within_capacity`].

-- 
2.50.0