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Wed, 15 Oct 2025 12:25:15 -0700 (PDT) Received: from 136.1.168.192.in-addr.arpa ([2600:4808:6353:5c00:8573:f4c5:e7a9:9cd9]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-87c012b165asm24076996d6.59.2025.10.15.12.25.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Oct 2025 12:25:14 -0700 (PDT) From: Tamir Duberstein Date: Wed, 15 Oct 2025 15:24:37 -0400 Subject: [PATCH v17 07/11] rust: debugfs: use `kernel::fmt` Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251015-cstr-core-v17-7-dc5e7aec870d@gmail.com> References: <20251015-cstr-core-v17-0-dc5e7aec870d@gmail.com> In-Reply-To: <20251015-cstr-core-v17-0-dc5e7aec870d@gmail.com> To: Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Greg Kroah-Hartman , "Rafael J. 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Howlett" , Uladzislau Rezki , Bjorn Helgaas , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, Tamir Duberstein X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=openssh-sha256; t=1760556295; l=4568; i=tamird@gmail.com; h=from:subject:message-id; bh=dVZb5Pcu1XHbZt2SW9FpYlV89iSmsSjiuXxsiQfQLK4=; b=U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgtYz36g7iDMSkY5K7Ab51ksGX7hJgs MRt+XVZTrIzMVIAAAAGcGF0YXR0AAAAAAAAAAZzaGE1MTIAAABTAAAAC3NzaC1lZDI1NTE5AAAA QIygDVPZERtANioDtpZsLIsIx6DMuRfppWFXkHaK3hI5+YEfWJFA0uNjCcv/4Z25JqUAs3bOoMG 11/p3YDZDuQA= X-Developer-Key: i=tamird@gmail.com; a=openssh; fpr=SHA256:264rPmnnrb+ERkS7DDS3tuwqcJss/zevJRzoylqMsbc 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"). Signed-off-by: Tamir Duberstein --- rust/kernel/debugfs.rs | 2 +- rust/kernel/debugfs/callback_adapters.rs | 7 +++---- rust/kernel/debugfs/file_ops.rs | 6 +++--- rust/kernel/debugfs/traits.rs | 10 +++++----- 4 files changed, 12 insertions(+), 13 deletions(-) diff --git a/rust/kernel/debugfs.rs b/rust/kernel/debugfs.rs index 381c23b3dd83..8c35d032acfe 100644 --- a/rust/kernel/debugfs.rs +++ b/rust/kernel/debugfs.rs @@ -8,12 +8,12 @@ // When DebugFS is disabled, many parameters are dead. Linting for this isn't helpful. #![cfg_attr(not(CONFIG_DEBUG_FS), allow(unused_variables))] +use crate::fmt; use crate::prelude::*; use crate::str::CStr; #[cfg(CONFIG_DEBUG_FS)] use crate::sync::Arc; use crate::uaccess::UserSliceReader; -use core::fmt; use core::marker::PhantomData; use core::marker::PhantomPinned; #[cfg(CONFIG_DEBUG_FS)] 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 @@ fn deref(&self) -> &D { impl Writer for FormatAdapter 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/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 @@ fn deref(&self) -> &Self::Target { struct WriterAdapter(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..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 @@ /// 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 Writer for Mutex { - fn write(&self, f: &mut Formatter<'_>) -> fmt::Result { + fn write(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { self.lock().write(f) } } -impl Writer for T { - fn write(&self, f: &mut Formatter<'_>) -> fmt::Result { +impl Writer for T { + fn write(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { writeln!(f, "{self:?}") } } -- 2.51.0