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Tue, 01 Jul 2025 09:49:55 -0700 (PDT) Received: from a.1.b.d.0.e.7.9.6.4.2.0.b.3.4.b.0.0.1.1.e.f.b.5.1.4.0.4.0.0.6.2.ip6.arpa ([2600:4041:5bfe:1100:70ac:5fd8:4c25:89ec]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7d44317e285sm793098885a.45.2025.07.01.09.49.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Jul 2025 09:49:54 -0700 (PDT) From: Tamir Duberstein Date: Tue, 01 Jul 2025 12:49:36 -0400 Subject: [PATCH v13 4/5] rust: replace `kernel::c_str!` with C-Strings Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250701-cstr-core-v13-4-29f7d3eb97a6@gmail.com> References: <20250701-cstr-core-v13-0-29f7d3eb97a6@gmail.com> In-Reply-To: <20250701-cstr-core-v13-0-29f7d3eb97a6@gmail.com> To: Michal Rostecki , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , 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 , Jens Axboe , Benno Lossin , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Dave Ertman , Ira Weiny , Leon Romanovsky , Breno Leitao , Viresh Kumar , Michael Turquette , Stephen Boyd 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, nouveau@lists.freedesktop.org, linux-block@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, Tamir Duberstein X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=openssh-sha256; t=1751388583; l=33087; i=tamird@gmail.com; h=from:subject:message-id; bh=hqkaPj0nMQ/DjY2jBDjxJUbc6Sqg7mUE2sqpgD6aXNY=; b=U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgtYz36g7iDMSkY5K7Ab51ksGX7hJgs MRt+XVZTrIzMVIAAAAGcGF0YXR0AAAAAAAAAAZzaGE1MTIAAABTAAAAC3NzaC1lZDI1NTE5AAAA QBTIsXQjc1v4GqF0cIwQ0w5vGNcJujl2h8X97ouGhW3QO2+F5C2Qr1biyC845FxUGKZSm1FoZTB 7JgFV/X4S3QI= X-Developer-Key: i=tamird@gmail.com; a=openssh; fpr=SHA256:264rPmnnrb+ERkS7DDS3tuwqcJss/zevJRzoylqMsbc C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible and rename `kernel::c_str!` to `str_to_cstr!` to clarify its intended use. Closes: https://github.com/Rust-for-Linux/linux/issues/1075 Acked-by: Greg Kroah-Hartman Reviewed-by: Alice Ryhl Signed-off-by: Tamir Duberstein --- drivers/block/rnull.rs | 2 +- drivers/cpufreq/rcpufreq_dt.rs | 5 ++--- drivers/gpu/drm/nova/driver.rs | 10 +++++----- drivers/gpu/nova-core/driver.rs | 6 +++--- drivers/net/phy/ax88796b_rust.rs | 7 +++---- drivers/net/phy/qt2025.rs | 5 ++--- rust/kernel/clk.rs | 6 ++---- rust/kernel/configfs.rs | 9 +++++---- rust/kernel/cpufreq.rs | 3 +-- rust/kernel/devres.rs | 2 +- rust/kernel/drm/ioctl.rs | 2 +- rust/kernel/firmware.rs | 6 +++--- rust/kernel/kunit.rs | 14 ++++++-------- rust/kernel/net/phy.rs | 6 ++---- rust/kernel/platform.rs | 4 ++-- rust/kernel/str.rs | 24 ++++++++++++++++-------- rust/kernel/sync.rs | 7 +++---- rust/kernel/sync/completion.rs | 2 +- rust/kernel/sync/lock/global.rs | 3 ++- rust/kernel/workqueue.rs | 8 ++++---- rust/macros/kunit.rs | 10 +++++----- rust/macros/module.rs | 2 +- samples/rust/rust_configfs.rs | 5 ++--- samples/rust/rust_driver_auxiliary.rs | 4 ++-- samples/rust/rust_driver_faux.rs | 4 ++-- samples/rust/rust_driver_pci.rs | 4 ++-- samples/rust/rust_driver_platform.rs | 4 ++-- samples/rust/rust_misc_device.rs | 3 +-- scripts/rustdoc_test_gen.rs | 4 ++-- 29 files changed, 84 insertions(+), 87 deletions(-) diff --git a/drivers/block/rnull.rs b/drivers/block/rnull.rs index 6366da12c5a5..9aa79b862b63 100644 --- a/drivers/block/rnull.rs +++ b/drivers/block/rnull.rs @@ -55,7 +55,7 @@ fn init(_module: &'static ThisModule) -> impl PinInit { })(); =20 try_pin_init!(Self { - _disk <- new_mutex!(disk?, "nullb:disk"), + _disk <- new_mutex!(disk?, c"nullb:disk"), }) } } diff --git a/drivers/cpufreq/rcpufreq_dt.rs b/drivers/cpufreq/rcpufreq_dt.rs index 30a170570c0e..0c88032dd919 100644 --- a/drivers/cpufreq/rcpufreq_dt.rs +++ b/drivers/cpufreq/rcpufreq_dt.rs @@ -3,7 +3,6 @@ //! Rust based implementation of the cpufreq-dt driver. =20 use kernel::{ - c_str, clk::Clk, cpu, cpufreq, cpumask::CpumaskVar, @@ -56,7 +55,7 @@ impl opp::ConfigOps for CPUFreqDTDriver {} =20 #[vtable] impl cpufreq::Driver for CPUFreqDTDriver { - const NAME: &'static CStr =3D c_str!("cpufreq-dt"); + const NAME: &'static CStr =3D c"cpufreq-dt"; const FLAGS: u16 =3D cpufreq::flags::NEED_INITIAL_FREQ_CHECK | cpufreq= ::flags::IS_COOLING_DEV; const BOOST_ENABLED: bool =3D true; =20 @@ -201,7 +200,7 @@ fn register_em(policy: &mut cpufreq::Policy) { OF_TABLE, MODULE_OF_TABLE, ::IdInfo, - [(of::DeviceId::new(c_str!("operating-points-v2")), ())] + [(of::DeviceId::new(c"operating-points-v2"), ())] ); =20 impl platform::Driver for CPUFreqDTDriver { diff --git a/drivers/gpu/drm/nova/driver.rs b/drivers/gpu/drm/nova/driver.rs index b28b2e05cc15..87480ee8dbae 100644 --- a/drivers/gpu/drm/nova/driver.rs +++ b/drivers/gpu/drm/nova/driver.rs @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 =20 -use kernel::{auxiliary, c_str, device::Core, drm, drm::gem, drm::ioctl, pr= elude::*, types::ARef}; +use kernel::{auxiliary, device::Core, drm, drm::gem, drm::ioctl, prelude::= *, types::ARef}; =20 use crate::file::File; use crate::gem::NovaObject; @@ -22,12 +22,12 @@ pub(crate) struct NovaData { major: 0, minor: 0, patchlevel: 0, - name: c_str!("nova"), - desc: c_str!("Nvidia Graphics"), + name: c"nova", + desc: c"Nvidia Graphics", }; =20 -const NOVA_CORE_MODULE_NAME: &CStr =3D c_str!("NovaCore"); -const AUXILIARY_NAME: &CStr =3D c_str!("nova-drm"); +const NOVA_CORE_MODULE_NAME: &CStr =3D c"NovaCore"; +const AUXILIARY_NAME: &CStr =3D c"nova-drm"; =20 kernel::auxiliary_device_table!( AUX_TABLE, diff --git a/drivers/gpu/nova-core/driver.rs b/drivers/gpu/nova-core/driver= .rs index a0e435dc4656..16cd7e36662c 100644 --- a/drivers/gpu/nova-core/driver.rs +++ b/drivers/gpu/nova-core/driver.rs @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 =20 -use kernel::{auxiliary, bindings, c_str, device::Core, pci, prelude::*}; +use kernel::{auxiliary, bindings, device::Core, pci, prelude::*}; =20 use crate::gpu::Gpu; =20 @@ -34,14 +34,14 @@ fn probe(pdev: &pci::Device, _info: &Self::IdInfo= ) -> Result(0, c_str!("nova-c= ore/bar0"))?; + let bar =3D pdev.iomap_region_sized::(0, c"nova-core/ba= r0")?; =20 let this =3D KBox::pin_init( try_pin_init!(Self { gpu <- Gpu::new(pdev, bar)?, _reg: auxiliary::Registration::new( pdev.as_ref(), - c_str!("nova-drm"), + c"nova-drm", 0, // TODO: Once it lands, use XArray; for now we don'= t use the ID. crate::MODULE_NAME )?, diff --git a/drivers/net/phy/ax88796b_rust.rs b/drivers/net/phy/ax88796b_ru= st.rs index bc73ebccc2aa..2d24628a4e58 100644 --- a/drivers/net/phy/ax88796b_rust.rs +++ b/drivers/net/phy/ax88796b_rust.rs @@ -5,7 +5,6 @@ //! //! C version of this driver: [`drivers/net/phy/ax88796b.c`](./ax88796b.c) use kernel::{ - c_str, net::phy::{self, reg::C22, DeviceId, Driver}, prelude::*, uapi, @@ -41,7 +40,7 @@ fn asix_soft_reset(dev: &mut phy::Device) -> Result { #[vtable] impl Driver for PhyAX88772A { const FLAGS: u32 =3D phy::flags::IS_INTERNAL; - const NAME: &'static CStr =3D c_str!("Asix Electronics AX88772A"); + const NAME: &'static CStr =3D c"Asix Electronics AX88772A"; const PHY_DEVICE_ID: DeviceId =3D DeviceId::new_with_exact_mask(0x003b= 1861); =20 // AX88772A is not working properly with some old switches (NETGEAR EN= 108TP): @@ -105,7 +104,7 @@ fn link_change_notify(dev: &mut phy::Device) { #[vtable] impl Driver for PhyAX88772C { const FLAGS: u32 =3D phy::flags::IS_INTERNAL; - const NAME: &'static CStr =3D c_str!("Asix Electronics AX88772C"); + const NAME: &'static CStr =3D c"Asix Electronics AX88772C"; const PHY_DEVICE_ID: DeviceId =3D DeviceId::new_with_exact_mask(0x003b= 1881); =20 fn suspend(dev: &mut phy::Device) -> Result { @@ -125,7 +124,7 @@ fn soft_reset(dev: &mut phy::Device) -> Result { =20 #[vtable] impl Driver for PhyAX88796B { - const NAME: &'static CStr =3D c_str!("Asix Electronics AX88796B"); + const NAME: &'static CStr =3D c"Asix Electronics AX88796B"; const PHY_DEVICE_ID: DeviceId =3D DeviceId::new_with_model_mask(0x003b= 1841); =20 fn soft_reset(dev: &mut phy::Device) -> Result { diff --git a/drivers/net/phy/qt2025.rs b/drivers/net/phy/qt2025.rs index 0b9400dcb4c1..9ccc75f70219 100644 --- a/drivers/net/phy/qt2025.rs +++ b/drivers/net/phy/qt2025.rs @@ -9,7 +9,6 @@ //! //! The QT2025 PHY integrates an Intel 8051 micro-controller. =20 -use kernel::c_str; use kernel::error::code; use kernel::firmware::Firmware; use kernel::net::phy::{ @@ -36,7 +35,7 @@ =20 #[vtable] impl Driver for PhyQT2025 { - const NAME: &'static CStr =3D c_str!("QT2025 10Gpbs SFP+"); + const NAME: &'static CStr =3D c"QT2025 10Gpbs SFP+"; const PHY_DEVICE_ID: phy::DeviceId =3D phy::DeviceId::new_with_exact_m= ask(0x0043a400); =20 fn probe(dev: &mut phy::Device) -> Result<()> { @@ -69,7 +68,7 @@ fn probe(dev: &mut phy::Device) -> Result<()> { // The micro-controller will start running from the boot ROM. dev.write(C45::new(Mmd::PCS, 0xe854), 0x00c0)?; =20 - let fw =3D Firmware::request(c_str!("qt2025-2.0.3.3.fw"), dev.as_r= ef())?; + let fw =3D Firmware::request(c"qt2025-2.0.3.3.fw", dev.as_ref())?; if fw.data().len() > SZ_16K + SZ_8K { return Err(code::EFBIG); } diff --git a/rust/kernel/clk.rs b/rust/kernel/clk.rs index 34a19bc99990..fb0f259cf231 100644 --- a/rust/kernel/clk.rs +++ b/rust/kernel/clk.rs @@ -100,13 +100,12 @@ mod common_clk { /// The following example demonstrates how to obtain and configure a c= lock for a device. /// /// ``` - /// use kernel::c_str; /// use kernel::clk::{Clk, Hertz}; /// use kernel::device::Device; /// use kernel::error::Result; /// /// fn configure_clk(dev: &Device) -> Result { - /// let clk =3D Clk::get(dev, Some(c_str!("apb_clk")))?; + /// let clk =3D Clk::get(dev, Some(c"apb_clk"))?; /// /// clk.prepare_enable()?; /// @@ -272,13 +271,12 @@ fn drop(&mut self) { /// device. The code functions correctly whether or not the clock is a= vailable. /// /// ``` - /// use kernel::c_str; /// use kernel::clk::{OptionalClk, Hertz}; /// use kernel::device::Device; /// use kernel::error::Result; /// /// fn configure_clk(dev: &Device) -> Result { - /// let clk =3D OptionalClk::get(dev, Some(c_str!("apb_clk")))?; + /// let clk =3D OptionalClk::get(dev, Some(c"apb_clk"))?; /// /// clk.prepare_enable()?; /// diff --git a/rust/kernel/configfs.rs b/rust/kernel/configfs.rs index d4797c41ba77..255460d571f6 100644 --- a/rust/kernel/configfs.rs +++ b/rust/kernel/configfs.rs @@ -21,7 +21,6 @@ //! //! ```ignore //! use kernel::alloc::flags; -//! use kernel::c_str; //! use kernel::configfs_attrs; //! use kernel::configfs; //! use kernel::new_mutex; @@ -50,7 +49,7 @@ //! //! try_pin_init!(Self { //! config <- configfs::Subsystem::new( -//! c_str!("rust_configfs"), item_type, Configuration::new= () +//! c"rust_configfs", item_type, Configuration::new() //! ), //! }) //! } @@ -66,7 +65,7 @@ //! impl Configuration { //! fn new() -> impl PinInit { //! try_pin_init!(Self { -//! message: c_str!("Hello World\n"), +//! message: c"Hello World\n", //! bar <- new_mutex!((KBox::new([0; PAGE_SIZE], flags::GFP_KE= RNEL)?, 0)), //! }) //! } @@ -1000,7 +999,9 @@ macro_rules! configfs_attrs { static [< $data:upper _ $name:upper _ATTR >]: $crate::configfs::Attribute<$attr, $data, $data> = =3D unsafe { - $crate::configfs::Attribute::new(c_str!(::= core::stringify!($name))) + $crate::configfs::Attribute::new( + $crate::str_to_cstr!(::core::stringify= !($name)), + ) }; )* =20 diff --git a/rust/kernel/cpufreq.rs b/rust/kernel/cpufreq.rs index 71d601f7c261..0f316dfeb5dd 100644 --- a/rust/kernel/cpufreq.rs +++ b/rust/kernel/cpufreq.rs @@ -841,7 +841,6 @@ fn register_em(_policy: &mut Policy) { /// ``` /// use kernel::{ /// cpufreq, -/// c_str, /// device::{Core, Device}, /// macros::vtable, /// of, platform, @@ -854,7 +853,7 @@ fn register_em(_policy: &mut Policy) { /// /// #[vtable] /// impl cpufreq::Driver for SampleDriver { -/// const NAME: &'static CStr =3D c_str!("cpufreq-sample"); +/// const NAME: &'static CStr =3D c"cpufreq-sample"; /// const FLAGS: u16 =3D cpufreq::flags::NEED_INITIAL_FREQ_CHECK | cpu= freq::flags::IS_COOLING_DEV; /// const BOOST_ENABLED: bool =3D true; /// diff --git a/rust/kernel/devres.rs b/rust/kernel/devres.rs index d0e6c6e162c2..dff443908278 100644 --- a/rust/kernel/devres.rs +++ b/rust/kernel/devres.rs @@ -47,7 +47,7 @@ struct DevresInner { /// # Examples /// /// ```no_run -/// # use kernel::{bindings, c_str, device::{Bound, Device}, devres::Devre= s, io::{Io, IoRaw}}; +/// # use kernel::{bindings, device::{Bound, Device}, devres::Devres, io::= {Io, IoRaw}}; /// # use core::ops::Deref; /// /// // See also [`pci::Bar`] for a real example. diff --git a/rust/kernel/drm/ioctl.rs b/rust/kernel/drm/ioctl.rs index 445639404fb7..e67c9fe9cb91 100644 --- a/rust/kernel/drm/ioctl.rs +++ b/rust/kernel/drm/ioctl.rs @@ -153,7 +153,7 @@ macro_rules! declare_drm_ioctls { Some($cmd) }, flags: $flags, - name: $crate::c_str!(::core::stringify!($cmd)).as_char= _ptr(), + name: $crate::str_to_cstr!(::core::stringify!($cmd)).a= s_char_ptr(), } ),*]; ioctls diff --git a/rust/kernel/firmware.rs b/rust/kernel/firmware.rs index 4adcf39b475e..d07849333991 100644 --- a/rust/kernel/firmware.rs +++ b/rust/kernel/firmware.rs @@ -51,13 +51,13 @@ fn request_nowarn() -> Self { /// # Examples /// /// ```no_run -/// # use kernel::{c_str, device::Device, firmware::Firmware}; +/// # use kernel::{device::Device, firmware::Firmware}; /// /// # fn no_run() -> Result<(), Error> { /// # // SAFETY: *NOT* safe, just for the example to get an `ARef`= instance /// # let dev =3D unsafe { Device::get_device(core::ptr::null_mut()) }; /// -/// let fw =3D Firmware::request(c_str!("path/to/firmware.bin"), &dev)?; +/// let fw =3D Firmware::request(c"path/to/firmware.bin", &dev)?; /// let blob =3D fw.data(); /// /// # Ok(()) @@ -204,7 +204,7 @@ macro_rules! module_firmware { ($($builder:tt)*) =3D> { const _: () =3D { const __MODULE_FIRMWARE_PREFIX: &'static $crate::str::CStr =3D= if cfg!(MODULE) { - $crate::c_str!("") + c"" } else { ::NAME }; diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs index 6f80dc673974..1d108e4a6a39 100644 --- a/rust/kernel/kunit.rs +++ b/rust/kernel/kunit.rs @@ -9,9 +9,6 @@ use crate::prelude::*; use core::fmt; =20 -#[cfg(CONFIG_PRINTK)] -use crate::c_str; - /// Prints a KUnit error-level message. /// /// Public but hidden since it should only be used from KUnit generated co= de. @@ -22,7 +19,7 @@ pub fn err(args: fmt::Arguments<'_>) { #[cfg(CONFIG_PRINTK)] unsafe { bindings::_printk( - c_str!("\x013%pA").as_char_ptr(), + c"\x013%pA".as_char_ptr(), core::ptr::from_ref(&args).cast::(), ); } @@ -38,7 +35,7 @@ pub fn info(args: fmt::Arguments<'_>) { #[cfg(CONFIG_PRINTK)] unsafe { bindings::_printk( - c_str!("\x016%pA").as_char_ptr(), + c"\x016%pA".as_char_ptr(), core::ptr::from_ref(&args).cast::(), ); } @@ -60,9 +57,10 @@ macro_rules! kunit_assert { break 'out; } =20 - static FILE: &'static $crate::str::CStr =3D $crate::c_str!($fi= le); + static FILE: &'static $crate::str::CStr =3D $file; static LINE: i32 =3D ::core::line!() as i32 - $diff; - static CONDITION: &'static $crate::str::CStr =3D $crate::c_str= !(stringify!($condition)); + static CONDITION: &'static $crate::str::CStr =3D + $crate::str_to_cstr!(stringify!($condition)); =20 // SAFETY: FFI call without safety requirements. let kunit_test =3D unsafe { $crate::bindings::kunit_get_curren= t_test() }; @@ -249,7 +247,7 @@ pub const fn kunit_case_null() -> kernel::bindings::kun= it_case { /// } /// /// static mut KUNIT_TEST_CASES: [kernel::bindings::kunit_case; 2] =3D [ -/// kernel::kunit::kunit_case(kernel::c_str!("name"), test_fn), +/// kernel::kunit::kunit_case(c"name", test_fn), /// kernel::kunit::kunit_case_null(), /// ]; /// kernel::kunit_unsafe_test_suite!(suite_name, KUNIT_TEST_CASES); diff --git a/rust/kernel/net/phy.rs b/rust/kernel/net/phy.rs index c420e5ecab4b..236ea516a134 100644 --- a/rust/kernel/net/phy.rs +++ b/rust/kernel/net/phy.rs @@ -781,7 +781,6 @@ const fn as_int(&self) -> u32 { /// /// ``` /// # mod module_phy_driver_sample { -/// use kernel::c_str; /// use kernel::net::phy::{self, DeviceId}; /// use kernel::prelude::*; /// @@ -800,7 +799,7 @@ const fn as_int(&self) -> u32 { /// /// #[vtable] /// impl phy::Driver for PhySample { -/// const NAME: &'static CStr =3D c_str!("PhySample"); +/// const NAME: &'static CStr =3D c"PhySample"; /// const PHY_DEVICE_ID: phy::DeviceId =3D phy::DeviceId::new_with_exa= ct_mask(0x00000001); /// } /// # } @@ -809,7 +808,6 @@ const fn as_int(&self) -> u32 { /// This expands to the following code: /// /// ```ignore -/// use kernel::c_str; /// use kernel::net::phy::{self, DeviceId}; /// use kernel::prelude::*; /// @@ -829,7 +827,7 @@ const fn as_int(&self) -> u32 { /// /// #[vtable] /// impl phy::Driver for PhySample { -/// const NAME: &'static CStr =3D c_str!("PhySample"); +/// const NAME: &'static CStr =3D c"PhySample"; /// const PHY_DEVICE_ID: phy::DeviceId =3D phy::DeviceId::new_with_exa= ct_mask(0x00000001); /// } /// diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs index 0a6a6be732b2..99ad0b132ab6 100644 --- a/rust/kernel/platform.rs +++ b/rust/kernel/platform.rs @@ -125,7 +125,7 @@ macro_rules! module_platform_driver { /// # Examples /// ///``` -/// # use kernel::{bindings, c_str, device::Core, of, platform}; +/// # use kernel::{bindings, device::Core, of, platform}; /// /// struct MyDriver; /// @@ -134,7 +134,7 @@ macro_rules! module_platform_driver { /// MODULE_OF_TABLE, /// ::IdInfo, /// [ -/// (of::DeviceId::new(c_str!("test,device")), ()) +/// (of::DeviceId::new(c"test,device"), ()) /// ] /// ); /// diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs index 5c365646c0e1..ff4aaf627179 100644 --- a/rust/kernel/str.rs +++ b/rust/kernel/str.rs @@ -266,15 +266,14 @@ impl crate::fmt::Display for CStr { /// Formats printable ASCII characters, escaping the rest. /// /// ``` - /// # use kernel::c_str; /// # use kernel::prelude::fmt; /// # use kernel::str::CStr; /// # use kernel::str::CString; - /// let penguin =3D c_str!("=F0=9F=90=A7"); + /// let penguin =3D c"=F0=9F=90=A7"; /// let s =3D CString::try_from_fmt(fmt!("{}", penguin))?; /// assert_eq!(s.to_bytes_with_nul(), "\\xf0\\x9f\\x90\\xa7\0".as_byte= s()); /// - /// let ascii =3D c_str!("so \"cool\""); + /// let ascii =3D c"so \"cool\""; /// let s =3D CString::try_from_fmt(fmt!("{}", ascii))?; /// assert_eq!(s.to_bytes_with_nul(), "so \"cool\"\0".as_bytes()); /// # Ok::<(), kernel::error::Error>(()) @@ -364,19 +363,28 @@ fn as_ref(&self) -> &BStr { } } =20 -/// Creates a new [`CStr`] from a string literal. +/// Creates a new [`CStr`] at compile time. /// -/// The string literal should not contain any `NUL` bytes. +/// Rust supports C string literals since Rust 1.77, and they should be us= ed instead of this macro +/// where possible. This macro exists to allow static *non-literal* C stri= ngs to be created at +/// compile time. This is most often used in other macros. +/// +/// # Panics +/// +/// This macro panics if the operand contains an interior `NUL` byte. /// /// # Examples /// /// ``` -/// # use kernel::c_str; +/// # use kernel::str_to_cstr; /// # use kernel::str::CStr; -/// const MY_CSTR: &CStr =3D c_str!("My awesome CStr!"); +/// const MY_CSTR: &CStr =3D str_to_cstr!(concat!(file!(), ":", line!(), "= : My CStr!")); /// ``` #[macro_export] -macro_rules! c_str { +macro_rules! str_to_cstr { + // NB: we could write `($str:lit) =3D> compile_error!("use a C string = literal instead");` here but + // that would trigger when the literal is at the top of several macro = expansions. That would be + // too limiting to macro authors, so we rely on the name as a hint ins= tead. ($str:expr) =3D> {{ const S: &str =3D concat!($str, "\0"); const C: &$crate::str::CStr =3D match $crate::str::CStr::from_byte= s_with_nul(S.as_bytes()) { diff --git a/rust/kernel/sync.rs b/rust/kernel/sync.rs index 63c99e015ad6..9e394ffa1334 100644 --- a/rust/kernel/sync.rs +++ b/rust/kernel/sync.rs @@ -43,7 +43,6 @@ impl LockClassKey { /// /// # Examples /// ``` - /// # use kernel::c_str; /// # use kernel::alloc::KBox; /// # use kernel::types::ForeignOwnable; /// # use kernel::sync::{LockClassKey, SpinLock}; @@ -55,7 +54,7 @@ impl LockClassKey { /// { /// stack_pin_init!(let num: SpinLock =3D SpinLock::new( /// 0, - /// c_str!("my_spinlock"), + /// c"my_spinlock", /// // SAFETY: `key_ptr` is returned by the above `into_foreig= n()`, whose /// // `from_foreign()` has not yet been called. /// unsafe { > as ForeignOwnable>::borr= ow(key_ptr) } @@ -108,9 +107,9 @@ macro_rules! static_lock_class { #[macro_export] macro_rules! optional_name { () =3D> { - $crate::c_str!(::core::concat!(::core::file!(), ":", ::core::line!= ())) + $crate::str_to_cstr!(::core::concat!(::core::file!(), ":", ::core:= :line!())) }; ($name:literal) =3D> { - $crate::c_str!($name) + $name }; } diff --git a/rust/kernel/sync/completion.rs b/rust/kernel/sync/completion.rs index c50012a940a3..97d39c248793 100644 --- a/rust/kernel/sync/completion.rs +++ b/rust/kernel/sync/completion.rs @@ -34,7 +34,7 @@ /// impl MyTask { /// fn new() -> Result> { /// let this =3D Arc::pin_init(pin_init!(MyTask { -/// work <- new_work!("MyTask::work"), +/// work <- new_work!(c"MyTask::work"), /// done <- Completion::new(), /// }), GFP_KERNEL)?; /// diff --git a/rust/kernel/sync/lock/global.rs b/rust/kernel/sync/lock/global= .rs index 79d0ef7fda86..9caa9b419f09 100644 --- a/rust/kernel/sync/lock/global.rs +++ b/rust/kernel/sync/lock/global.rs @@ -267,7 +267,8 @@ macro_rules! global_lock { $pub enum $name {} =20 impl $crate::sync::lock::GlobalLockBackend for $name { - const NAME: &'static $crate::str::CStr =3D $crate::c_str!(::co= re::stringify!($name)); + const NAME: &'static $crate::str::CStr =3D + $crate::str_to_cstr!(::core::stringify!($name)); type Item =3D $valuety; type Backend =3D $crate::global_lock_inner!(backend $kind); =20 diff --git a/rust/kernel/workqueue.rs b/rust/kernel/workqueue.rs index cce23684af24..432624c69c72 100644 --- a/rust/kernel/workqueue.rs +++ b/rust/kernel/workqueue.rs @@ -51,7 +51,7 @@ //! fn new(value: i32) -> Result> { //! Arc::pin_init(pin_init!(MyStruct { //! value, -//! work <- new_work!("MyStruct::work"), +//! work <- new_work!(c"MyStruct::work"), //! }), GFP_KERNEL) //! } //! } @@ -98,8 +98,8 @@ //! Arc::pin_init(pin_init!(MyStruct { //! value_1, //! value_2, -//! work_1 <- new_work!("MyStruct::work_1"), -//! work_2 <- new_work!("MyStruct::work_2"), +//! work_1 <- new_work!(c"MyStruct::work_1"), +//! work_2 <- new_work!(c"MyStruct::work_2"), //! }), GFP_KERNEL) //! } //! } @@ -215,7 +215,7 @@ pub fn try_spawn( func: T, ) -> Result<(), AllocError> { let init =3D pin_init!(ClosureWork { - work <- new_work!("Queue::try_spawn"), + work <- new_work!(c"Queue::try_spawn"), func: Some(func), }); =20 diff --git a/rust/macros/kunit.rs b/rust/macros/kunit.rs index 81d18149a0cc..c64df1a01b9d 100644 --- a/rust/macros/kunit.rs +++ b/rust/macros/kunit.rs @@ -89,8 +89,8 @@ pub(crate) fn kunit_tests(attr: TokenStream, ts: TokenStr= eam) -> TokenStream { // unsafe extern "C" fn kunit_rust_wrapper_bar(_test: *mut ::kernel::b= indings::kunit) { bar(); } // // static mut TEST_CASES: [::kernel::bindings::kunit_case; 3] =3D [ - // ::kernel::kunit::kunit_case(::kernel::c_str!("foo"), kunit_rust= _wrapper_foo), - // ::kernel::kunit::kunit_case(::kernel::c_str!("bar"), kunit_rust= _wrapper_bar), + // ::kernel::kunit::kunit_case(c"foo", kunit_rust_wrapper_foo), + // ::kernel::kunit::kunit_case(c"bar", kunit_rust_wrapper_bar), // ::kernel::kunit::kunit_case_null(), // ]; // @@ -109,7 +109,7 @@ pub(crate) fn kunit_tests(attr: TokenStream, ts: TokenS= tream) -> TokenStream { writeln!(kunit_macros, "{kunit_wrapper}").unwrap(); writeln!( test_cases, - " ::kernel::kunit::kunit_case(::kernel::c_str!(\"{test}\"),= {kunit_wrapper_fn_name})," + " ::kernel::kunit::kunit_case(c\"{test}\", {kunit_wrapper_f= n_name})," ) .unwrap(); writeln!( @@ -119,7 +119,7 @@ pub(crate) fn kunit_tests(attr: TokenStream, ts: TokenS= tream) -> TokenStream { #[allow(unused)] macro_rules! assert {{ ($cond:expr $(,)?) =3D> {{{{ - kernel::kunit_assert!("{test}", "{path}", 0, $cond); + kernel::kunit_assert!("{test}", c"{path}", 0, $cond); }}}} }} =20 @@ -127,7 +127,7 @@ macro_rules! assert {{ #[allow(unused)] macro_rules! assert_eq {{ ($left:expr, $right:expr $(,)?) =3D> {{{{ - kernel::kunit_assert_eq!("{test}", "{path}", 0, $left, $right); + kernel::kunit_assert_eq!("{test}", c"{path}", 0, $left, $right); }}}} }} "# diff --git a/rust/macros/module.rs b/rust/macros/module.rs index 5dd276a2e5cb..532342a38b6f 100644 --- a/rust/macros/module.rs +++ b/rust/macros/module.rs @@ -228,7 +228,7 @@ pub(crate) fn module(ts: TokenStream) -> TokenStream { type LocalModule =3D {type_}; =20 impl ::kernel::ModuleMetadata for {type_} {{ - const NAME: &'static ::kernel::str::CStr =3D ::kernel::c_s= tr!(\"{name}\"); + const NAME: &'static ::kernel::str::CStr =3D c\"{name}\"; }} =20 // Double nested modules, since then nobody can access the pub= lic items inside. diff --git a/samples/rust/rust_configfs.rs b/samples/rust/rust_configfs.rs index 5005453f874d..ea84c23b784b 100644 --- a/samples/rust/rust_configfs.rs +++ b/samples/rust/rust_configfs.rs @@ -3,7 +3,6 @@ //! Rust configfs sample. =20 use kernel::alloc::flags; -use kernel::c_str; use kernel::configfs; use kernel::configfs_attrs; use kernel::new_mutex; @@ -35,7 +34,7 @@ struct Configuration { impl Configuration { fn new() -> impl PinInit { try_pin_init!(Self { - message: c_str!("Hello World\n"), + message: c"Hello World\n", bar <- new_mutex!((KBox::new([0; PAGE_SIZE], flags::GFP_KERNEL= )?, 0)), }) } @@ -61,7 +60,7 @@ fn init(_module: &'static ThisModule) -> impl PinInit { =20 try_pin_init!(Self { config <- configfs::Subsystem::new( - c_str!("rust_configfs"), item_type, Configuration::new() + c"rust_configfs", item_type, Configuration::new() ), }) } diff --git a/samples/rust/rust_driver_auxiliary.rs b/samples/rust/rust_driv= er_auxiliary.rs index abf3d55ed249..eaac5a94f796 100644 --- a/samples/rust/rust_driver_auxiliary.rs +++ b/samples/rust/rust_driver_auxiliary.rs @@ -5,14 +5,14 @@ //! To make this driver probe, QEMU must be run with `-device pci-testdev`. =20 use kernel::{ - auxiliary, bindings, c_str, device::Core, driver, error::Error, pci, p= relude::*, str::CStr, + auxiliary, bindings, device::Core, driver, error::Error, pci, prelude:= :*, str::CStr, InPlaceModule, }; =20 use pin_init::PinInit; =20 const MODULE_NAME: &CStr =3D ::NAME; -const AUXILIARY_NAME: &CStr =3D c_str!("auxiliary"); +const AUXILIARY_NAME: &CStr =3D c"auxiliary"; =20 struct AuxiliaryDriver; =20 diff --git a/samples/rust/rust_driver_faux.rs b/samples/rust/rust_driver_fa= ux.rs index ecc9fd378cbd..23add3160693 100644 --- a/samples/rust/rust_driver_faux.rs +++ b/samples/rust/rust_driver_faux.rs @@ -2,7 +2,7 @@ =20 //! Rust faux device sample. =20 -use kernel::{c_str, faux, prelude::*, Module}; +use kernel::{faux, prelude::*, Module}; =20 module! { type: SampleModule, @@ -20,7 +20,7 @@ impl Module for SampleModule { fn init(_module: &'static ThisModule) -> Result { pr_info!("Initialising Rust Faux Device Sample\n"); =20 - let reg =3D faux::Registration::new(c_str!("rust-faux-sample-devic= e"), None)?; + let reg =3D faux::Registration::new(c"rust-faux-sample-device", No= ne)?; =20 dev_info!(reg.as_ref(), "Hello from faux device!\n"); =20 diff --git a/samples/rust/rust_driver_pci.rs b/samples/rust/rust_driver_pci= .rs index 15147e4401b2..4ba5fcd2b357 100644 --- a/samples/rust/rust_driver_pci.rs +++ b/samples/rust/rust_driver_pci.rs @@ -4,7 +4,7 @@ //! //! To make this driver probe, QEMU must be run with `-device pci-testdev`. =20 -use kernel::{bindings, c_str, device::Core, devres::Devres, pci, prelude::= *, types::ARef}; +use kernel::{bindings, device::Core, devres::Devres, pci, prelude::*, type= s::ARef}; =20 struct Regs; =20 @@ -73,7 +73,7 @@ fn probe(pdev: &pci::Device, info: &Self::IdInfo) -= > Result pdev.enable_device_mem()?; pdev.set_master(); =20 - let bar =3D pdev.iomap_region_sized::<{ Regs::END }>(0, c_str!("ru= st_driver_pci"))?; + let bar =3D pdev.iomap_region_sized::<{ Regs::END }>(0, c"rust_dri= ver_pci")?; =20 let drvdata =3D KBox::new( Self { diff --git a/samples/rust/rust_driver_platform.rs b/samples/rust/rust_drive= r_platform.rs index 8b42b3cfb363..e6487a970a59 100644 --- a/samples/rust/rust_driver_platform.rs +++ b/samples/rust/rust_driver_platform.rs @@ -2,7 +2,7 @@ =20 //! Rust Platform driver sample. =20 -use kernel::{c_str, device::Core, of, platform, prelude::*, types::ARef}; +use kernel::{device::Core, of, platform, prelude::*, types::ARef}; =20 struct SampleDriver { pdev: ARef, @@ -14,7 +14,7 @@ struct SampleDriver { OF_TABLE, MODULE_OF_TABLE, ::IdInfo, - [(of::DeviceId::new(c_str!("test,rust-device")), Info(42))] + [(of::DeviceId::new(c"test,rust-device"), Info(42))] ); =20 impl platform::Driver for SampleDriver { diff --git a/samples/rust/rust_misc_device.rs b/samples/rust/rust_misc_devi= ce.rs index c881fd6dbd08..12b64296e912 100644 --- a/samples/rust/rust_misc_device.rs +++ b/samples/rust/rust_misc_device.rs @@ -98,7 +98,6 @@ use core::pin::Pin; =20 use kernel::{ - c_str, device::Device, fs::File, ioctl::{_IO, _IOC_SIZE, _IOR, _IOW}, @@ -133,7 +132,7 @@ fn init(_module: &'static ThisModule) -> impl PinInit { pr_info!("Initialising Rust Misc Device Sample\n"); =20 let options =3D MiscDeviceOptions { - name: c_str!("rust-misc-device"), + name: c"rust-misc-device", }; =20 try_pin_init!(Self { diff --git a/scripts/rustdoc_test_gen.rs b/scripts/rustdoc_test_gen.rs index 507d36875196..0e86bdf1b5b1 100644 --- a/scripts/rustdoc_test_gen.rs +++ b/scripts/rustdoc_test_gen.rs @@ -173,7 +173,7 @@ pub extern "C" fn {kunit_name}(__kunit_test: *mut ::ker= nel::bindings::kunit) {{ macro_rules! assert {{ ($cond:expr $(,)?) =3D> {{{{ ::kernel::kunit_assert!( - "{kunit_name}", "{real_path}", __DOCTEST_ANCHOR - {line}, = $cond + "{kunit_name}", c"{real_path}", __DOCTEST_ANCHOR - {line},= $cond ); }}}} }} @@ -183,7 +183,7 @@ macro_rules! assert {{ macro_rules! assert_eq {{ ($left:expr, $right:expr $(,)?) =3D> {{{{ ::kernel::kunit_assert_eq!( - "{kunit_name}", "{real_path}", __DOCTEST_ANCHOR - {line}, = $left, $right + "{kunit_name}", c"{real_path}", __DOCTEST_ANCHOR - {line},= $left, $right ); }}}} }} --=20 2.50.0