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Mon, 17 Mar 2025 08:30:23 -0700 (PDT) From: Tamir Duberstein Date: Mon, 17 Mar 2025 11:30:06 -0400 Subject: [PATCH v9 4/4] rust: remove core::ffi::CStr reexport Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250317-cstr-core-v9-4-51d6cc522f62@gmail.com> References: <20250317-cstr-core-v9-0-51d6cc522f62@gmail.com> In-Reply-To: <20250317-cstr-core-v9-0-51d6cc522f62@gmail.com> To: Michal Rostecki , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Brendan Higgins , David Gow , Rae Moar , Danilo Krummrich , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Greg Kroah-Hartman , "Rafael J. Wysocki" , Luis Chamberlain , Russ Weight , FUJITA Tomonori , Rob Herring , Saravana Kannan , Peter Zijlstra , Ingo Molnar , Will Deacon , Waiman Long , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Andrew Lunn , Heiner Kallweit , Russell King , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Bjorn Helgaas , Arnd Bergmann Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, dri-devel@lists.freedesktop.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, llvm@lists.linux.dev, linux-pci@vger.kernel.org, Tamir Duberstein X-Mailer: b4 0.15-dev Clean up references to `kernel::str::CStr`. Signed-off-by: Tamir Duberstein --- drivers/gpu/drm/drm_panic_qr.rs | 4 ++-- drivers/net/phy/ax88796b_rust.rs | 1 + drivers/net/phy/qt2025.rs | 1 + rust/kernel/device.rs | 3 +-- rust/kernel/driver.rs | 4 ++-- rust/kernel/error.rs | 6 ++---- rust/kernel/faux.rs | 5 ++++- rust/kernel/firmware.rs | 10 ++-------- rust/kernel/kunit.rs | 6 +++--- rust/kernel/lib.rs | 2 +- rust/kernel/miscdevice.rs | 3 +-- rust/kernel/net/phy.rs | 4 +++- rust/kernel/of.rs | 3 ++- rust/kernel/pci.rs | 3 +-- rust/kernel/platform.rs | 3 +-- rust/kernel/prelude.rs | 5 +---- rust/kernel/str.rs | 19 +++++++++---------- rust/kernel/sync/condvar.rs | 3 ++- rust/kernel/sync/lock.rs | 4 ++-- rust/kernel/sync/lock/global.rs | 5 +++-- rust/kernel/sync/poll.rs | 1 + rust/kernel/workqueue.rs | 1 + rust/macros/module.rs | 2 +- 23 files changed, 47 insertions(+), 51 deletions(-) diff --git a/drivers/gpu/drm/drm_panic_qr.rs b/drivers/gpu/drm/drm_panic_qr.rs index fa55547a1535..61f878347be7 100644 --- a/drivers/gpu/drm/drm_panic_qr.rs +++ b/drivers/gpu/drm/drm_panic_qr.rs @@ -26,8 +26,8 @@ //! * //! * -use core::cmp; -use kernel::{prelude::*, str::CStr}; +use core::{cmp, ffi::CStr}; +use kernel::prelude::*; #[derive(Debug, Clone, Copy, PartialEq, Eq, Ord, PartialOrd)] struct Version(usize); diff --git a/drivers/net/phy/ax88796b_rust.rs b/drivers/net/phy/ax88796b_rust.rs index 2d24628a4e58..68b8e30ae296 100644 --- a/drivers/net/phy/ax88796b_rust.rs +++ b/drivers/net/phy/ax88796b_rust.rs @@ -4,6 +4,7 @@ //! Rust Asix PHYs driver //! //! C version of this driver: [`drivers/net/phy/ax88796b.c`](./ax88796b.c) +use core::ffi::CStr; use kernel::{ net::phy::{self, reg::C22, DeviceId, Driver}, prelude::*, diff --git a/drivers/net/phy/qt2025.rs b/drivers/net/phy/qt2025.rs index 78f52efd13e3..07d026c1f9b5 100644 --- a/drivers/net/phy/qt2025.rs +++ b/drivers/net/phy/qt2025.rs @@ -9,6 +9,7 @@ //! //! The QT2025 PHY integrates an Intel 8051 micro-controller. +use core::ffi::CStr; use kernel::error::code; use kernel::firmware::Firmware; use kernel::net::phy::{ diff --git a/rust/kernel/device.rs b/rust/kernel/device.rs index df4bfa5f51ea..a1123206819b 100644 --- a/rust/kernel/device.rs +++ b/rust/kernel/device.rs @@ -6,10 +6,9 @@ use crate::{ bindings, - str::CStr, types::{ARef, Opaque}, }; -use core::{fmt, ptr}; +use core::{ffi::CStr, fmt, ptr}; #[cfg(CONFIG_PRINTK)] use crate::str::CStrExt as _; diff --git a/rust/kernel/driver.rs b/rust/kernel/driver.rs index ec9166cedfa7..9926664d9ba2 100644 --- a/rust/kernel/driver.rs +++ b/rust/kernel/driver.rs @@ -6,8 +6,8 @@ //! register using the [`Registration`] class. use crate::error::{Error, Result}; -use crate::{device, of, str::CStr, try_pin_init, types::Opaque, ThisModule}; -use core::pin::Pin; +use crate::{device, of, try_pin_init, types::Opaque, ThisModule}; +use core::{ffi::CStr, pin::Pin}; use pin_init::{pin_data, pinned_drop, PinInit}; /// The [`RegistrationOps`] trait serves as generic interface for subsystems (e.g., PCI, Platform, diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs index 58157ec9403c..a2a6f74904d3 100644 --- a/rust/kernel/error.rs +++ b/rust/kernel/error.rs @@ -4,11 +4,9 @@ //! //! C header: [`include/uapi/asm-generic/errno-base.h`](srctree/include/uapi/asm-generic/errno-base.h) -use crate::{ - alloc::{layout::LayoutError, AllocError}, - str::CStr, -}; +use crate::alloc::{layout::LayoutError, AllocError}; +use core::ffi::CStr; use core::fmt; use core::num::NonZeroI32; use core::num::TryFromIntError; diff --git a/rust/kernel/faux.rs b/rust/kernel/faux.rs index 5acc0c02d451..d932186f75b1 100644 --- a/rust/kernel/faux.rs +++ b/rust/kernel/faux.rs @@ -7,7 +7,10 @@ //! C header: [`include/linux/device/faux.h`] use crate::{bindings, device, error::code::*, prelude::*}; -use core::ptr::{addr_of_mut, null, null_mut, NonNull}; +use core::{ + ffi::CStr, + ptr::{addr_of_mut, null, null_mut, NonNull}, +}; /// The registration of a faux device. /// diff --git a/rust/kernel/firmware.rs b/rust/kernel/firmware.rs index 70449571aea6..f400ef81f495 100644 --- a/rust/kernel/firmware.rs +++ b/rust/kernel/firmware.rs @@ -4,14 +4,8 @@ //! //! C header: [`include/linux/firmware.h`](srctree/include/linux/firmware.h) -use crate::{ - bindings, - device::Device, - error::Error, - error::Result, - str::{CStr, CStrExt as _}, -}; -use core::ptr::NonNull; +use crate::{bindings, device::Device, error::Error, error::Result, str::CStrExt as _}; +use core::{ffi::CStr, ptr::NonNull}; /// # Invariants /// diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs index 527794dcc439..f4e0e58877a0 100644 --- a/rust/kernel/kunit.rs +++ b/rust/kernel/kunit.rs @@ -56,10 +56,10 @@ macro_rules! kunit_assert { break 'out; } - static NAME: &'static $crate::str::CStr = $crate::c_str_avoid_literals!($name); - static FILE: &'static $crate::str::CStr = $crate::c_str_avoid_literals!($file); + static NAME: &'static core::ffi::CStr = $crate::c_str_avoid_literals!($name); + static FILE: &'static core::ffi::CStr = $crate::c_str_avoid_literals!($file); static LINE: i32 = core::line!() as i32 - $diff; - static CONDITION: &'static $crate::str::CStr = + static CONDITION: &'static core::ffi::CStr = $crate::c_str_avoid_literals!(stringify!($condition)); // SAFETY: FFI call without safety requirements. diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs index c92497c7c655..2360cba7354b 100644 --- a/rust/kernel/lib.rs +++ b/rust/kernel/lib.rs @@ -133,7 +133,7 @@ fn init(module: &'static ThisModule) -> impl pin_init::PinInit u32 { /// /// ``` /// # mod module_phy_driver_sample { +/// use core::ffi::CStr; /// use kernel::net::phy::{self, DeviceId}; /// use kernel::prelude::*; /// @@ -807,6 +808,7 @@ const fn as_int(&self) -> u32 { /// This expands to the following code: /// /// ```ignore +/// use core::ffi::CStr; /// use kernel::net::phy::{self, DeviceId}; /// use kernel::prelude::*; /// diff --git a/rust/kernel/of.rs b/rust/kernel/of.rs index 12ea65df46de..087ac8e05551 100644 --- a/rust/kernel/of.rs +++ b/rust/kernel/of.rs @@ -2,7 +2,8 @@ //! Device Tree / Open Firmware abstractions. -use crate::{bindings, device_id::RawDeviceId, prelude::*}; +use crate::{bindings, device_id::RawDeviceId}; +use core::ffi::CStr; /// IdTable type for OF drivers. pub type IdTable = &'static dyn kernel::device_id::IdTable; diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs index f7b2743828ae..1b4df605bd2b 100644 --- a/rust/kernel/pci.rs +++ b/rust/kernel/pci.rs @@ -13,11 +13,10 @@ error::{to_result, Result}, io::Io, io::IoRaw, - str::CStr, types::{ARef, ForeignOwnable, Opaque}, ThisModule, }; -use core::{ops::Deref, ptr::addr_of_mut}; +use core::{ffi::CStr, ops::Deref, ptr::addr_of_mut}; use kernel::prelude::*; /// An adapter for the registration of PCI drivers. diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs index 474f8cb4587b..ca439581129a 100644 --- a/rust/kernel/platform.rs +++ b/rust/kernel/platform.rs @@ -9,12 +9,11 @@ error::{to_result, Result}, of, prelude::*, - str::CStr, types::{ARef, ForeignOwnable, Opaque}, ThisModule, }; -use core::ptr::addr_of_mut; +use core::{ffi::CStr, ptr::addr_of_mut}; /// An adapter for the registration of platform drivers. pub struct Adapter(T); diff --git a/rust/kernel/prelude.rs b/rust/kernel/prelude.rs index 97a66d29f48b..5b530a25d0ff 100644 --- a/rust/kernel/prelude.rs +++ b/rust/kernel/prelude.rs @@ -36,10 +36,7 @@ pub use super::error::{code::*, Error, Result}; -pub use super::{ - str::{CStr, CStrExt as _}, - ThisModule, -}; +pub use super::{str::CStrExt as _, ThisModule}; pub use super::init::InPlaceInit; diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs index f1b35fa5823a..fa44856b4ade 100644 --- a/rust/kernel/str.rs +++ b/rust/kernel/str.rs @@ -3,6 +3,7 @@ //! String representations. use crate::alloc::{flags::*, AllocError, KVec}; +use core::ffi::CStr; use core::fmt::{self, Write}; use core::ops::{Deref, DerefMut}; @@ -129,8 +130,6 @@ macro_rules! b_str { }}; } -pub use core::ffi::CStr; - /// Returns a C pointer to the string. // It is a free function rather than a method on an extension trait because: // @@ -371,8 +370,8 @@ fn as_ref(&self) -> &BStr { /// # Examples /// /// ``` +/// # use core::ffi::CStr; /// # use kernel::c_str_avoid_literals; -/// # use kernel::str::CStr; /// const MY_CSTR: &CStr = c_str_avoid_literals!(concat!(file!(), ":", line!(), ": My CStr!")); /// ``` #[macro_export] @@ -382,13 +381,13 @@ macro_rules! c_str_avoid_literals { // too limiting to macro authors, so we rely on the name as a hint instead. ($str:expr) => {{ const S: &'static str = concat!($str, "\0"); - const C: &'static $crate::str::CStr = - match $crate::str::CStr::from_bytes_with_nul(S.as_bytes()) { - Ok(v) => v, - Err(core::ffi::FromBytesWithNulError { .. }) => { - panic!("string contains interior NUL") - } - }; + const C: &'static core::ffi::CStr = match core::ffi::CStr::from_bytes_with_nul(S.as_bytes()) + { + Ok(v) => v, + Err(core::ffi::FromBytesWithNulError { .. }) => { + panic!("string contains interior NUL") + } + }; C }}; } diff --git a/rust/kernel/sync/condvar.rs b/rust/kernel/sync/condvar.rs index b3e7889db44b..8da123f9fb12 100644 --- a/rust/kernel/sync/condvar.rs +++ b/rust/kernel/sync/condvar.rs @@ -8,11 +8,12 @@ use super::{lock::Backend, lock::Guard, LockClassKey}; use crate::{ ffi::{c_int, c_long}, - str::{CStr, CStrExt as _}, + str::CStrExt as _, task::{MAX_SCHEDULE_TIMEOUT, TASK_INTERRUPTIBLE, TASK_NORMAL, TASK_UNINTERRUPTIBLE}, time::Jiffies, types::Opaque, }; +use core::ffi::CStr; use core::marker::PhantomPinned; use core::ptr; use pin_init::{pin_data, pin_init, PinInit}; diff --git a/rust/kernel/sync/lock.rs b/rust/kernel/sync/lock.rs index 0b36d4a3d3cc..bf2b3465f390 100644 --- a/rust/kernel/sync/lock.rs +++ b/rust/kernel/sync/lock.rs @@ -7,10 +7,10 @@ use super::LockClassKey; use crate::{ - str::{CStr, CStrExt as _}, + str::CStrExt as _, types::{NotThreadSafe, Opaque, ScopeGuard}, }; -use core::{cell::UnsafeCell, marker::PhantomPinned}; +use core::{cell::UnsafeCell, ffi::CStr, marker::PhantomPinned}; use pin_init::{pin_data, pin_init, PinInit}; pub mod mutex; diff --git a/rust/kernel/sync/lock/global.rs b/rust/kernel/sync/lock/global.rs index 4a040c29faee..7d6d1abf9279 100644 --- a/rust/kernel/sync/lock/global.rs +++ b/rust/kernel/sync/lock/global.rs @@ -5,13 +5,14 @@ //! Support for defining statics containing locks. use crate::{ - str::{CStr, CStrExt as _}, + str::CStrExt as _, sync::lock::{Backend, Guard, Lock}, sync::{LockClassKey, LockedBy}, types::Opaque, }; use core::{ cell::UnsafeCell, + ffi::CStr, marker::{PhantomData, PhantomPinned}, }; @@ -266,7 +267,7 @@ macro_rules! global_lock { $pub enum $name {} impl $crate::sync::lock::GlobalLockBackend for $name { - const NAME: &'static $crate::str::CStr = + const NAME: &'static core::ffi::CStr = $crate::c_str_avoid_literals!(::core::stringify!($name)); type Item = $valuety; type Backend = $crate::global_lock_inner!(backend $kind); diff --git a/rust/kernel/sync/poll.rs b/rust/kernel/sync/poll.rs index e105477a3cb1..d23fd6998ecf 100644 --- a/rust/kernel/sync/poll.rs +++ b/rust/kernel/sync/poll.rs @@ -11,6 +11,7 @@ sync::{CondVar, LockClassKey}, types::Opaque, }; +use core::ffi::CStr; use core::ops::Deref; /// Creates a [`PollCondVar`] initialiser with the given name and a newly-created lock class. diff --git a/rust/kernel/workqueue.rs b/rust/kernel/workqueue.rs index 0cd100d2aefb..25723207c2be 100644 --- a/rust/kernel/workqueue.rs +++ b/rust/kernel/workqueue.rs @@ -135,6 +135,7 @@ use crate::alloc::{AllocError, Flags}; use crate::{prelude::*, sync::Arc, sync::LockClassKey, types::Opaque}; +use core::ffi::CStr; use core::marker::PhantomData; /// Creates a [`Work`] initialiser with the given name and a newly-created lock class. diff --git a/rust/macros/module.rs b/rust/macros/module.rs index 5467a0d539f7..d764fc35dfe5 100644 --- a/rust/macros/module.rs +++ b/rust/macros/module.rs @@ -237,7 +237,7 @@ pub(crate) fn module(ts: TokenStream) -> TokenStream { }}; impl kernel::ModuleMetadata for {type_} {{ - const NAME: &'static kernel::str::CStr = c\"{name}\"; + const NAME: &'static core::ffi::CStr = c\"{name}\"; }} // Double nested modules, since then nobody can access the public items inside.