From nobody Tue Feb 10 11:23:30 2026 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EEA7486347 for ; Sat, 7 Feb 2026 00:12:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.67.36.66 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770423165; cv=none; b=You14Iu2mvHBupMC99iXIlEVzGogAKj+NsTJweSy57GKQ8gIcua0xm3KGPzZIT1FJ6uyaQOaEpbGenywZExWNuiLGLg3iKibckIF5SCoOSsDBBTAHEez0CVrViBfPfd/jB2+L4g2j4JA7jMNfotMH5iqq5OxN49nXSvs7tGOGOA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770423165; c=relaxed/simple; bh=JDTZ/DKXCT5IqfBt6mf6TxRiTpdhp8kCyDCumLKo81M=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WHiobToOjpTsjZpRiEDvSdhM19QvADSRgbabO/abPDo36+D4g+O+ct9SCZV7duU6IEvPHf7fwB6De/wsziHFOPcSH1X3A9XIpvhpPHVR/e/r9VWi0f7/p2jz8/vijp6pLcIFAuKkR+pHXnXVIjVrtSK1lo/bOss0djR2LeXB/jc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=posteo.de; spf=pass smtp.mailfrom=posteo.de; dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de header.b=pwgCkyAk; arc=none smtp.client-ip=185.67.36.66 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=posteo.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=posteo.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de header.b="pwgCkyAk" Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 94470240103 for ; Sat, 7 Feb 2026 01:12:43 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017; t=1770423163; bh=AkmMpmqu94Yavhw2vaIs+kHQopWIrgX+KHcocuIkxrw=; h=From:Date:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding:Message-Id:To:Cc:Autocrypt:OpenPGP:From; b=pwgCkyAkdJPIQn22Hrt4PZjmr8GJ3Msr3Vq1MB3WyqFZtLWk6N0mQFmrRb9eYYJIM ogevQJ6dYRXEEOih/epffOWbhcxXpmwVaIaaj1dqty7ewOrwWhiw37btFq//m+eVTg L+FN4Y4r0j3GCQ1mOePzNPjE99dBZQuI6UcDfYUOQEhbajn4q+FGjvsp8qYYBj5uVN mTKcDAwph7cUBFAJ3H/wI5g3bdEimXkLPs+8f/VBD2tybADXd6hasohmpg+K1eYysV 0VvPyoEmA7ZsDN29OWjOpYl14bq1KmxQA76VdDW0ySD09N9SMNDnBJmJBsHrbZSQ4K 7AK6Z5OSsUAhA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4f7BHF0dC5z6tsf; Sat, 7 Feb 2026 01:12:41 +0100 (CET) From: Markus Probst Date: Sat, 07 Feb 2026 00:12:42 +0000 Subject: [PATCH v12 1/3] rust: leds: add basic led classdev abstractions 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: <20260207-rust_leds-v12-1-fdb518417b75@posteo.de> References: <20260207-rust_leds-v12-0-fdb518417b75@posteo.de> In-Reply-To: <20260207-rust_leds-v12-0-fdb518417b75@posteo.de> To: Lee Jones , Pavel Machek , Greg Kroah-Hartman , Dave Ertman , Ira Weiny , Leon Romanovsky , 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 , "Rafael J. Wysocki" , Bjorn Helgaas , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= Cc: rust-for-linux@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Markus Probst X-Developer-Signature: v=1; a=openpgp-sha256; l=18740; i=markus.probst@posteo.de; h=from:subject:message-id; bh=JDTZ/DKXCT5IqfBt6mf6TxRiTpdhp8kCyDCumLKo81M=; b=owEBiQJ2/ZANAwAIATR2H/jnrUPSAcsmYgBphoNvFVmnuJNgXdN5sMFsziN8xClLaYlqMLvuk TujVAGtP1+JAk8EAAEIADkWIQSCdBjE9KxY53IwxHM0dh/4561D0gUCaYaDbxsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMSwyLDIACgkQNHYf+OetQ9LYFhAAkD5k9jrl6H96/wRNQhNt68AOJ4YopSu 9i6dFN6s2oW8aPr8fvxzLvVKvbOXIxH57IkXr2ugrdFbz4j8dqF7q5/lAr18qPI/hphSNWEoH3p CWroSiEOMzGxfrleuG3cN+RLB0onwiVQ75Px0NXDv7vF/R0tpSIkRxzKlnNnjWDLV/EWJIS4P2J 26ZU7NwQDajoJEpXUqIHmiXqbdCizSi67Qyt9o9dFWm6NW943zmuDmT0AIQu+DmjUthPqGVQXuu KLPKpQG/V9k8vII/plmf3irULqRJkbSfF8NDxPo8b5ibhdh7GXr7sb7FeTOB9Zb61rK34sGYz+e IsiO7T1tHjrVHf9mdZIQDfKnOw72bybh8/ENLBVk3vAyccDfNn+ONm/tuuOz83SRKLfx9cTKB5U KERRv5lzXvvyYjLIa9fi9tjzIyUgS71xZ81ZC7BL4SY7n9PBbSjkWNV8xxOtQAFMfv4lJfDy+xH Zvep0bDgThSen2K+WswaQVLym3b+qfpROI1UGsE/AoKQcE7q2CpVIbU0IPGmDYU7AGm3FTyQT/a fmNQoZtvUuDFb4YSepN1NCUvyQDAb7UochM+MXI5d0pogeMUK6eEjils29iymlSU3W2Q+5knn9I ZKECVbz7bYMuucab+r9r6f4JeeBd/MGUNppIKQ7g6iyMYaT1qV00= X-Developer-Key: i=markus.probst@posteo.de; 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preference=encrypt Implement the core abstractions needed for led class devices, including: * `led::LedOps` - the trait for handling leds, including `brightness_set`, `brightness_get` and `blink_set` * `led::DeviceBuilder` - the builder for the led class device * `led::Device` - a safe wrapper around `led_classdev` Signed-off-by: Markus Probst --- MAINTAINERS | 8 ++ rust/kernel/led.rs | 252 ++++++++++++++++++++++++++++++++++++++++++= ++++ rust/kernel/led/normal.rs | 218 +++++++++++++++++++++++++++++++++++++++ rust/kernel/lib.rs | 1 + 4 files changed, 479 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 0efa8cc6775b..5f8b59678785 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14279,6 +14279,14 @@ F: drivers/leds/ F: include/dt-bindings/leds/ F: include/linux/leds.h =20 +LED SUBSYSTEM [RUST] +M: Markus Probst +L: linux-leds@vger.kernel.org +L: rust-for-linux@vger.kernel.org +S: Maintained +F: rust/kernel/led.rs +F: rust/kernel/led/ + LEGO MINDSTORMS EV3 R: David Lechner S: Maintained diff --git a/rust/kernel/led.rs b/rust/kernel/led.rs new file mode 100644 index 000000000000..646846c56a01 --- /dev/null +++ b/rust/kernel/led.rs @@ -0,0 +1,252 @@ +// SPDX-License-Identifier: GPL-2.0 + +//! Abstractions for the leds driver model. +//! +//! C header: [`include/linux/leds.h`](srctree/include/linux/leds.h) + +use core::{ + marker::PhantomData, + mem::transmute, + ptr::NonNull, // +}; + +use crate::{ + container_of, + device::{ + self, + property::FwNode, + AsBusDevice, + Bound, // + }, + devres::Devres, + error::{ + from_result, + to_result, + VTABLE_DEFAULT_ERROR, // + }, + macros::vtable, + prelude::*, + str::CStrExt, + types::{ + ARef, + Opaque, // + }, // +}; + +mod normal; + +pub use normal::Device; + +/// The builder to register a led class device. +/// +/// See [`LedOps`]. +#[derive(Default)] +pub struct DeviceBuilder<'a> { + fwnode: Option>, + devicename: Option<&'a CStr>, + devname_mandatory: bool, + initial_brightness: u32, + default_trigger: Option<&'a CStr>, + color: Color, +} + +impl DeviceBuilder<'static> { + /// Creates a new [`DeviceBuilder`]. + #[inline] + pub fn new() -> Self { + Self::default() + } +} + +impl<'a> DeviceBuilder<'a> { + /// Sets the firmware node. + #[inline] + pub fn fwnode(self, fwnode: Option>) -> Self { + Self { fwnode, ..self } + } + + /// Sets the device name. + #[inline] + pub fn devicename(self, devicename: &'a CStr) -> Self { + Self { + devicename: Some(devicename), + ..self + } + } + + /// Sets if a device name is mandatory. + #[inline] + pub fn devicename_mandatory(self, mandatory: bool) -> Self { + Self { + devname_mandatory: mandatory, + ..self + } + } + + /// Sets the initial brightness value for the led. + /// + /// The default brightness is 0. + /// If [`LedOps::brightness_get`] is implemented, this value will be i= gnored. + #[inline] + pub fn initial_brightness(self, brightness: u32) -> Self { + Self { + initial_brightness: brightness, + ..self + } + } + + /// Set the default led trigger. + /// + /// This value can be overwritten by the "linux,default-trigger" fwnod= e property. + #[inline] + pub fn default_trigger(self, trigger: &'a CStr) -> Self { + Self { + default_trigger: Some(trigger), + ..self + } + } + + /// Sets the color of the led. + /// + /// This value can be overwritten by the "color" fwnode property. + #[inline] + pub fn color(self, color: Color) -> Self { + Self { color, ..self } + } +} + +/// Trait defining the operations for a LED driver. +/// +/// # Examples +/// ``` +/// use kernel::{ +/// device, +/// devres::Devres, +/// led, +/// macros::vtable, +/// platform, +/// prelude::*, // +/// }; +/// +/// struct MyLedOps; +/// +/// +/// #[vtable] +/// impl led::LedOps for MyLedOps { +/// type Bus =3D platform::Device; +/// const BLOCKING: bool =3D false; +/// const MAX_BRIGHTNESS: u32 =3D 255; +/// +/// fn brightness_set( +/// &self, +/// _dev: &platform::Device, +/// _classdev: &led::Device, +/// _brightness: u32 +/// ) -> Result<()> { +/// // Set the brightness for the led here +/// Ok(()) +/// } +/// } +/// +/// fn register_my_led( +/// parent: &platform::Device, +/// ) -> Result>>>> { +/// KBox::pin_init(led::DeviceBuilder::new() +/// .build( +/// parent, +/// Ok(MyLedOps), +/// ), GFP_KERNEL) +/// } +/// ``` +/// Led drivers must implement this trait in order to register and handle = a [`Device`]. +#[vtable] +pub trait LedOps: Send + 'static + Sized { + /// The bus device required by the implementation. + #[allow(private_bounds)] + type Bus: AsBusDevice; + + /// If set true, [`LedOps::brightness_set`] and [`LedOps::blink_set`] = must perform the + /// operation immediately. If set false, they must not sleep. + const BLOCKING: bool; + /// The max brightness level. + const MAX_BRIGHTNESS: u32; + + /// Sets the brightness level. + /// + /// See also [`LedOps::BLOCKING`]. + fn brightness_set( + &self, + dev: &Self::Bus, + classdev: &Device, + brightness: u32, + ) -> Result<()>; + + /// Gets the current brightness level. + fn brightness_get(&self, dev: &Self::Bus, classdev: &Device) -> = u32 { + let _ =3D (dev, classdev); + build_error!(VTABLE_DEFAULT_ERROR) + } + + /// Activates hardware accelerated blinking. + /// + /// delays are in milliseconds. If both are zero, a sensible default s= hould be chosen. + /// The caller should adjust the timings in that case and if it can't = match the values + /// specified exactly. Setting the brightness to 0 will disable the ha= rdware accelerated + /// blinking. + /// + /// See also [`LedOps::BLOCKING`]. + fn blink_set( + &self, + dev: &Self::Bus, + classdev: &Device, + delay_on: &mut usize, + delay_off: &mut usize, + ) -> Result<()> { + let _ =3D (dev, classdev, delay_on, delay_off); + build_error!(VTABLE_DEFAULT_ERROR) + } +} + +/// Led colors. +#[derive(Copy, Clone, Debug, Default)] +#[repr(u32)] +#[non_exhaustive] +#[expect( + missing_docs, + reason =3D "it shouldn't be necessary to document each color" +)] +pub enum Color { + #[default] + White =3D bindings::LED_COLOR_ID_WHITE, + Red =3D bindings::LED_COLOR_ID_RED, + Green =3D bindings::LED_COLOR_ID_GREEN, + Blue =3D bindings::LED_COLOR_ID_BLUE, + Amber =3D bindings::LED_COLOR_ID_AMBER, + Violet =3D bindings::LED_COLOR_ID_VIOLET, + Yellow =3D bindings::LED_COLOR_ID_YELLOW, + Ir =3D bindings::LED_COLOR_ID_IR, + Multi =3D bindings::LED_COLOR_ID_MULTI, + Rgb =3D bindings::LED_COLOR_ID_RGB, + Purple =3D bindings::LED_COLOR_ID_PURPLE, + Orange =3D bindings::LED_COLOR_ID_ORANGE, + Pink =3D bindings::LED_COLOR_ID_PINK, + Cyan =3D bindings::LED_COLOR_ID_CYAN, + Lime =3D bindings::LED_COLOR_ID_LIME, +} +static_assert!(bindings::LED_COLOR_ID_MAX =3D=3D 15); + +impl TryFrom for Color { + type Error =3D Error; + + fn try_from(value: u32) -> core::result::Result { + if value < bindings::LED_COLOR_ID_MAX { + // SAFETY: + // - `Color` is represented as `u32` + // - the static_assert above guarantees that no additional col= or has been added + // - `value` is guaranteed to be in the color id range + Ok(unsafe { transmute::(value) }) + } else { + Err(EINVAL) + } + } +} diff --git a/rust/kernel/led/normal.rs b/rust/kernel/led/normal.rs new file mode 100644 index 000000000000..efce886b5c04 --- /dev/null +++ b/rust/kernel/led/normal.rs @@ -0,0 +1,218 @@ +// SPDX-License-Identifier: GPL-2.0 + +//! Led mode for the `struct led_classdev`. +//! +//! C header: [`include/linux/leds.h`](srctree/include/linux/leds.h) + +use super::*; + +/// The led class device representation. +/// +/// This structure represents the Rust abstraction for a led class device. +#[pin_data(PinnedDrop)] +pub struct Device { + #[pin] + ops: T, + #[pin] + classdev: Opaque, +} + +impl<'a> DeviceBuilder<'a> { + /// Registers a new [`Device`]. + pub fn build( + self, + parent: &'a T::Bus, + ops: impl PinInit + 'a, + ) -> impl PinInit>, Error> + 'a { + Devres::new( + parent.as_ref(), + try_pin_init!(Device { + ops <- ops, + classdev <- Opaque::try_ffi_init(|ptr: *mut bindings::led_= classdev| { + // SAFETY: `try_ffi_init` guarantees that `ptr` is val= id for write. + // `led_classdev` gets fully initialized in-place by + // `led_classdev_register_ext` including `mutex` and `= list_head`. + unsafe { + ptr.write(bindings::led_classdev { + brightness_set: (!T::BLOCKING) + .then_some(Adapter::::brightness_set_ca= llback), + brightness_set_blocking: T::BLOCKING + .then_some(Adapter::::brightness_set_bl= ocking_callback), + brightness_get: T::HAS_BRIGHTNESS_GET + .then_some(Adapter::::brightness_get_ca= llback), + blink_set: T::HAS_BLINK_SET.then_some(Adapter:= :::blink_set_callback), + max_brightness: T::MAX_BRIGHTNESS, + brightness: self.initial_brightness, + default_trigger: self + .default_trigger + .map_or(core::ptr::null(), CStrExt::as_cha= r_ptr), + color: self.color as u32, + ..bindings::led_classdev::default() + }) + }; + + let mut init_data =3D bindings::led_init_data { + fwnode: self + .fwnode + .as_ref() + .map_or(core::ptr::null_mut(), |fwnode| fwnode= .as_raw()), + default_label: core::ptr::null(), + devicename: self + .devicename + .map_or(core::ptr::null(), CStrExt::as_char_pt= r), + devname_mandatory: self.devname_mandatory, + }; + + // SAFETY: + // - `parent.as_ref().as_raw()` is guaranteed to be a = pointer to a valid + // `device`. + // - `ptr` is guaranteed to be a pointer to an initial= ized `led_classdev`. + to_result(unsafe { + bindings::led_classdev_register_ext( + parent.as_ref().as_raw(), + ptr, + &raw mut init_data, + ) + })?; + + core::mem::forget(self.fwnode); // keep the reference = count incremented + + Ok::<_, Error>(()) + }), + }), + ) + } +} + +impl Device { + /// # Safety + /// `led_cdev` must be a valid pointer to a `led_classdev` embedded wi= thin a + /// `led::Device`. + unsafe fn from_raw<'a>(led_cdev: *mut bindings::led_classdev) -> &'a S= elf { + // SAFETY: The function's contract guarantees that `led_cdev` poin= ts to a `led_classdev` + // field embedded within a valid `led::Device`. `container_of!` ca= n therefore + // safely calculate the address of the containing struct. + unsafe { &*container_of!(Opaque::cast_from(led_cdev), Self, classd= ev) } + } + + fn parent(&self) -> &device::Device { + // SAFETY: `self.classdev.get()` is guaranteed to be a valid point= er to `led_classdev`. + unsafe { device::Device::from_raw((*(*self.classdev.get()).dev).pa= rent) } + } +} + +// SAFETY: A `led::Device` can be unregistered from any thread. +unsafe impl Send for Device {} + +// SAFETY: `led::Device` can be shared among threads because all methods o= f `led::Device` +// are thread safe. +unsafe impl Sync for Device {} + +struct Adapter { + _p: PhantomData, +} + +impl Adapter { + /// # Safety + /// `led_cdev` must be a valid pointer to a `led_classdev` embedded wi= thin a + /// `led::Device`. + /// This function is called on setting the brightness of a led. + unsafe extern "C" fn brightness_set_callback( + led_cdev: *mut bindings::led_classdev, + brightness: u32, + ) { + // SAFETY: The function's contract guarantees that `led_cdev` is a= valid pointer to a + // `led_classdev` embedded within a `led::Device`. + let classdev =3D unsafe { Device::::from_raw(led_cdev) }; + // SAFETY: `classdev.parent()` is guaranteed to be contained in `T= ::Bus`. + let parent =3D unsafe { T::Bus::from_device(classdev.parent()) }; + + let _ =3D classdev.ops.brightness_set(parent, classdev, brightness= ); + } + + /// # Safety + /// `led_cdev` must be a valid pointer to a `led_classdev` embedded wi= thin a + /// `led::Device`. + /// This function is called on setting the brightness of a led immedia= tely. + unsafe extern "C" fn brightness_set_blocking_callback( + led_cdev: *mut bindings::led_classdev, + brightness: u32, + ) -> i32 { + from_result(|| { + // SAFETY: The function's contract guarantees that `led_cdev` = is a valid pointer to a + // `led_classdev` embedded within a `led::Device`. + let classdev =3D unsafe { Device::::from_raw(led_cdev) }; + // SAFETY: `classdev.parent()` is guaranteed to be contained i= n `T::Bus`. + let parent =3D unsafe { T::Bus::from_device(classdev.parent())= }; + + classdev.ops.brightness_set(parent, classdev, brightness)?; + Ok(0) + }) + } + + /// # Safety + /// `led_cdev` must be a valid pointer to a `led_classdev` embedded wi= thin a + /// `led::Device`. + /// This function is called on getting the brightness of a led. + unsafe extern "C" fn brightness_get_callback(led_cdev: *mut bindings::= led_classdev) -> u32 { + // SAFETY: The function's contract guarantees that `led_cdev` is a= valid pointer to a + // `led_classdev` embedded within a `led::Device`. + let classdev =3D unsafe { Device::::from_raw(led_cdev) }; + // SAFETY: `classdev.parent()` is guaranteed to be contained in `T= ::Bus`. + let parent =3D unsafe { T::Bus::from_device(classdev.parent()) }; + + classdev.ops.brightness_get(parent, classdev) + } + + /// # Safety + /// `led_cdev` must be a valid pointer to a `led_classdev` embedded wi= thin a + /// `led::Device`. + /// `delay_on` and `delay_off` must be valid pointers to `usize` and h= ave + /// exclusive access for the period of this function. + /// This function is called on enabling hardware accelerated blinking. + unsafe extern "C" fn blink_set_callback( + led_cdev: *mut bindings::led_classdev, + delay_on: *mut usize, + delay_off: *mut usize, + ) -> i32 { + from_result(|| { + // SAFETY: The function's contract guarantees that `led_cdev` = is a valid pointer to a + // `led_classdev` embedded within a `led::Device`. + let classdev =3D unsafe { Device::::from_raw(led_cdev) }; + // SAFETY: `classdev.parent()` is guaranteed to be contained i= n `T::Bus`. + let parent =3D unsafe { T::Bus::from_device(classdev.parent())= }; + + classdev.ops.blink_set( + parent, + classdev, + // SAFETY: The function's contract guarantees that `delay_= on` points to a `usize` + // and is exclusive for the period of this function. + unsafe { &mut *delay_on }, + // SAFETY: The function's contract guarantees that `delay_= off` points to a `usize` + // and is exclusive for the period of this function. + unsafe { &mut *delay_off }, + )?; + Ok(0) + }) + } +} + +#[pinned_drop] +impl PinnedDrop for Device { + fn drop(self: Pin<&mut Self>) { + let raw =3D self.classdev.get(); + // SAFETY: The existence of `self` guarantees that `self.classdev.= get()` is a pointer to a + // valid `led_classdev`. + let dev: &device::Device =3D unsafe { device::Device::from_raw((*r= aw).dev) }; + + let _fwnode =3D dev + .fwnode() + // SAFETY: the reference count of `fwnode` has previously been + // incremented in `led::Device::new`. + .map(|fwnode| unsafe { ARef::from_raw(NonNull::from(fwnode)) }= ); + + // SAFETY: The existence of `self` guarantees that `self.classdev`= has previously been + // successfully registered with `led_classdev_register_ext`. + unsafe { bindings::led_classdev_unregister(raw) }; + } +} diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs index f812cf120042..231818e0614b 100644 --- a/rust/kernel/lib.rs +++ b/rust/kernel/lib.rs @@ -108,6 +108,7 @@ pub mod jump_label; #[cfg(CONFIG_KUNIT)] pub mod kunit; +pub mod led; pub mod list; pub mod maple_tree; pub mod miscdevice; --=20 2.52.0