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2025-09-02rust: block: add remote completion to `Request`Andreas Hindborg3-4/+38
Allow users of rust block device driver API to schedule completion of requests via `blk_mq_complete_request_remote`. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-16-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: block: mq: fix spelling in a safety commentAndreas Hindborg1-1/+1
Add code block quotes to a safety comment. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-15-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: block: add `GenDisk` private data supportAndreas Hindborg3-16/+69
Allow users of the rust block device driver API to install private data in the `GenDisk` structure. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-14-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rnull: enable configuration via `configfs`Andreas Hindborg1-1/+1
Allow rust null block devices to be configured and instantiated via `configfs`. Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-13-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: block: add block related constantsAndreas Hindborg1-0/+13
Add a few block subsystem constants to the rust `kernel::block` name space. This makes it easier to access the constants from rust code. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-11-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: block: remove trait bound from `mq::Request` definitionAndreas Hindborg1-1/+1
Remove the trait bound `T:Operations` from `mq::Request`. The bound is not required, so remove it to reduce complexity. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-10-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: block: remove `RawWriter`Andreas Hindborg2-57/+0
`RawWriter` is now dead code, so remove it. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-9-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: block: use `NullTerminatedFormatter`Andreas Hindborg3-6/+8
Use the new `NullTerminatedFormatter` to write the name of a `GenDisk` to the name buffer. This new formatter automatically adds a trailing null marker after the written characters, so we don't need to append that at the call site any longer. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-8-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: block: normalize imports for `gen_disk.rs`Andreas Hindborg1-3/+7
Clean up the import statements in `gen_disk.rs` to make the code easier to maintain. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-7-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: configfs: re-export `configfs_attrs` from `configfs` moduleAndreas Hindborg1-0/+2
Re-export `configfs_attrs` from `configfs` module, so that users can import the macro from the `configfs` module rather than the root of the `kernel` crate. Also update users to import from the new path. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-6-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: str: introduce `kstrtobool` functionAndreas Hindborg1-0/+79
Add a Rust wrapper for the kernel's `kstrtobool` function that converts common user inputs into boolean values. Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-5-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: str: introduce `NullTerminatedFormatter`Andreas Hindborg1-0/+49
Add `NullTerminatedFormatter`, a formatter that writes a null terminated string to an array or slice buffer. Because this type needs to manage the trailing null marker, the existing formatters cannot be used to implement this type. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-4-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: str: expose `str::{Formatter, RawFormatter}` publicly.Andreas Hindborg1-5/+4
rnull is going to make use of `str::Formatter` and `str::RawFormatter`, so expose them with public visibility. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-3-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: str: allow `str::Formatter` to format into `&mut [u8]`.Andreas Hindborg1-6/+17
Improve `Formatter` so that it can write to an array or slice buffer. Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-2-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: str: normalize imports in `str.rs`Andreas Hindborg1-4/+5
Clean up imports in `str.rs`. This makes future code manipulation more manageable. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250902-rnull-up-v6-16-v7-1-b5212cc89b98@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-09-02rust: device: fix unresolved link to drm::DeviceDanilo Krummrich1-2/+3
drm::Device is only available when CONFIG_DRM=y, which we have to consider for intra-doc links, otherwise the rustdoc make target produces the following warning. >> warning: unresolved link to `kernel::drm::Device` --> rust/kernel/device.rs:154:22 | 154 | /// [`drm::Device`]: kernel::drm::Device | ^^^^^^^^^^^^^^^^^^^ no item named `drm` in module `kernel` | = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default Fix this by making the intra-doc link conditional on CONFIG_DRM being enabled. Fixes: d6e26c1ae4a6 ("device: rust: expand documentation for Device") Suggested-by: Alice Ryhl <aliceryhl@google.com> Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202508261644.9LclwUgt-lkp@intel.com/ Reviewed-by: Alice Ryhl <aliceryhl@google.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20250829195745.31174-1-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-09-01rust: pci: inline several tiny functionsJohn Hubbard1-0/+5
Several previous commits added Vendor and Class functionality. As part of that, the new functions were inlined where appropriate. But that left this file with inconsistent use of inlining. Fix that by inlining the remaining items that should be. Cc: Danilo Krummrich <dakr@kernel.org> Cc: Elle Rhumsaa <elle@weathered-steel.dev> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: John Hubbard <jhubbard@nvidia.com> Link: https://lore.kernel.org/r/20250829223632.144030-7-jhubbard@nvidia.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-09-01rust: pci: use pci::Vendor instead of bindings::PCI_VENDOR_ID_*John Hubbard2-10/+26
Change Device::vendor_id() to return a Vendor type, and change DeviceId::from_id() to accept a Vendor type. Use the new pci::Vendor in the various Rust for Linux callers who were previously using bindings::PCI_VENDOR_ID_*. Doing so also allows removing "use kernel::bindings" entirely from most of the affected files here. Also, mark vendor_id() as inline. Cc: Danilo Krummrich <dakr@kernel.org> Cc: Elle Rhumsaa <elle@weathered-steel.dev> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: John Hubbard <jhubbard@nvidia.com> Link: https://lore.kernel.org/r/20250829223632.144030-6-jhubbard@nvidia.com [ Replace "as a validated vendor" with "as [`Vendor`]". - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-09-01rust: pci: add DeviceId::from_class_and_vendor() methodJohn Hubbard1-0/+23
Add a new method to create PCI DeviceIds that match both a specific vendor and PCI class. This is more targeted than the existing from_class() method as it filters on both vendor and class criteria. Cc: Danilo Krummrich <dakr@kernel.org> Cc: Elle Rhumsaa <elle@weathered-steel.dev> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: John Hubbard <jhubbard@nvidia.com> Link: https://lore.kernel.org/r/20250829223632.144030-4-jhubbard@nvidia.com [ Minor doc-comment improvements. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-09-01rust: pci: provide access to PCI Vendor valuesJohn Hubbard2-2/+336
This allows callers to write Vendor::SOME_COMPANY instead of bindings::PCI_VENDOR_ID_SOME_COMPANY. New APIs: Vendor::SOME_COMPANY Vendor::from_raw() -- Only accessible from the pci (parent) module. Vendor::as_raw() Vendor: fmt::Display for Vendor Cc: Danilo Krummrich <dakr@kernel.org> Cc: Elle Rhumsaa <elle@weathered-steel.dev> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: John Hubbard <jhubbard@nvidia.com> Link: https://lore.kernel.org/r/20250829223632.144030-3-jhubbard@nvidia.com [ Minor doc-comment improvements, align Debug and Display. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-09-01rust: pci: provide access to PCI Class and Class-related itemsJohn Hubbard2-0/+247
Allow callers to write Class::STORAGE_SCSI instead of bindings::PCI_CLASS_STORAGE_SCSI, for example. New APIs: Class::STORAGE_SCSI, Class::NETWORK_ETHERNET, etc. Class::from_raw() -- Only callable from pci module. Class::as_raw() ClassMask: Full, ClassSubclass Device::pci_class() Cc: Danilo Krummrich <dakr@kernel.org> Cc: Elle Rhumsaa <elle@weathered-steel.dev> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: John Hubbard <jhubbard@nvidia.com> Link: https://lore.kernel.org/r/20250829223632.144030-2-jhubbard@nvidia.com [ Minor doc-comment improvements, align Debug and Display. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-09-01rust: file: use to_result for error handlingOnur Özkan1-4/+3
Simplifies error handling by replacing the manual check of the return value with the `to_result` helper. Signed-off-by: Onur Özkan <work@onurozkan.dev> Link: https://lore.kernel.org/20250821091001.28563-1-work@onurozkan.dev Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-08-31rust: use the new name Location::file_as_c_str() in Rust >= 1.91.0Alice Ryhl1-5/+10
As part of the stabilization of Location::file_with_nul(), it was brought up that the with_nul() suffix usually means something else in Rust APIs, so the API is being renamed prior to stabilization [1]. Thus, use the new name on new rustc versions. Link: https://www.github.com/rust-lang/rust/pull/145928 [1] Signed-off-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Link: https://lore.kernel.org/r/20250827-file_as_c_str-v1-1-d3f5a3916a9c@google.com [ Kept `cfg` separation. Reworded slightly. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2025-08-28rust: transmute: add `from_bytes_copy` method to `FromBytes` traitAlexandre Courbot1-0/+18
`FromBytes::from_bytes` comes with a few practical limitations: - It requires the bytes slice to have the same alignment as the returned type, which might not be guaranteed in the case of a byte stream, - It returns a reference, requiring the returned type to implement `Clone` if one wants to keep the value for longer than the lifetime of the slice. To overcome these when needed, add a `from_bytes_copy` with a default implementation in the trait. `from_bytes_copy` returns an owned value that is populated using an unaligned read, removing the lifetime constraint and making it usable even on non-aligned byte slices. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Acked-by: Miguel Ojeda <ojeda@kernel.org> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Link: https://lore.kernel.org/r/20250826-nova_firmware-v2-1-93566252fe3a@nvidia.com Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
2025-08-28rust: transmute: Add methods for FromBytes traitChristian S. Lima2-1/+69
The two methods added take a slice of bytes and return those bytes in a specific type. These methods are useful when we need to transform the stream of bytes into specific type. Since the `is_aligned` method for pointer types has been stabilized in `1.79` version and is being used in this patch, I'm enabling the feature. In this case, using this method is useful to check the alignment and avoid a giant boilerplate, such as `(foo.as_ptr() as usize) % core::mem::align_of::<T>() == 0`. Also add `#[allow(clippy::incompatible_msrv)]` where needed until the MSRV is updated to `1.79`. Suggested-by: Benno Lossin <benno.lossin@proton.me> Link: https://github.com/Rust-for-Linux/linux/issues/1119 Reviewed-by: Alice Ryhl <aliceryhl@google.com> Tested-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Christian S. Lima <christiansantoslima21@gmail.com> Link: https://lore.kernel.org/r/20250824213134.27079-1-christiansantoslima21@gmail.com Acked-by: Miguel Ojeda <ojeda@kernel.org> [acourbot@nvidia.com: minor rewording of commit messages and doccomments] [acourbot@nvidia.com: revert slice implementation removal] [acourbot@nvidia.com: move incompatible_msrv clippy allow closer to site of need] [acourbot@nvidia.com: call the doctest method] Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
2025-08-28rust: regulator: use `to_result` for error handlingOnur Özkan1-5/+2
Simplifies error handling by replacing the manual check of the return value with the `to_result` helper. Signed-off-by: Onur Özkan <work@onurozkan.dev> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Message-ID: <20250821090720.23939-1-work@onurozkan.dev> Signed-off-by: Mark Brown <broonie@kernel.org>
2025-08-27rust: mm: mark VmaNew as transparentBaptiste Lepers1-0/+1
Unsafe code in VmaNew's methods assumes that the type has the same layout as the inner `bindings::vm_area_struct`. This is not guaranteed by the default struct representation in Rust, but requires specifying the `transparent` representation. Link: https://lkml.kernel.org/r/20250812132712.61007-1-baptiste.lepers@gmail.com Fixes: dcb81aeab406 ("mm: rust: add VmaNew for f_ops->mmap()") Signed-off-by: Baptiste Lepers <baptiste.lepers@gmail.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Gary Guo <gary@garyguo.net> Cc: Jann Horn <jannh@google.com> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Trevor Gross <tmgross@umich.edu> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-08-26kunit: Introduce param_init/exit for parameterized test context managementMarie Zhussupova1-0/+4
Add (*param_init) and (*param_exit) function pointers to `struct kunit_case`. Users will be able to set them via the new KUNIT_CASE_PARAM_WITH_INIT() macro. param_init/exit will be invoked by kunit_run_tests() once before and once after the parameterized test, respectively. They will receive the `struct kunit` that holds the parameterized test context; facilitating init and exit for shared state. This patch also sets param_init/exit to None in rust/kernel/kunit.rs. Link: https://lore.kernel.org/r/20250826091341.1427123-3-davidgow@google.com Reviewed-by: Rae Moar <rmoar@google.com> Reviewed-by: David Gow <davidgow@google.com> Signed-off-by: Marie Zhussupova <marievic@google.com> Signed-off-by: David Gow <davidgow@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2025-08-26rust: opp: use to_result for error handlingOnur Özkan1-11/+5
Simplifies error handling by replacing the manual check of the return value with the `to_result` helper. Signed-off-by: Onur Özkan <work@onurozkan.dev> Reviewed-by: Elle Rhumsaa <elle@weathered-steel.dev> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2025-08-25Merge 6.17-rc3 into driver-core-nextGreg Kroah-Hartman7-55/+344
We need the driver core and rust fixes in here as well to build on top of. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-08-24rust: alloc: remove `allocator_test`Miguel Ojeda2-120/+0
Given we do not have tests that rely on it anymore, remove `allocator_test`, which simplifies the complexity of the build. In particular, it avoids potential issues with `rusttest`, such as the one fixed at [1], where a public function was added to `Kmalloc` and used elsewhere, but it was not added to `Cmalloc`; or trivial issues like a missing import [2] due to not many people testing that target. The only downside is that we cannot use it in the `macros`' crate examples anymore, but we did not feel a need for that so far, and anyway we could support that by running those within the kernel too, which we may do regardless. Link: https://lore.kernel.org/rust-for-linux/20250816204215.2719559-1-ojeda@kernel.org/ [1] Link: https://lore.kernel.org/rust-for-linux/20250816210214.2729269-1-ojeda@kernel.org/ [2] Signed-off-by: Miguel Ojeda <ojeda@kernel.org> Link: https://lore.kernel.org/r/20250816211900.2731720-1-ojeda@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-24rust: kernel: remove support for unused host `#[test]`sMiguel Ojeda3-6/+6
Since commit 028df914e546 ("rust: str: convert `rusttest` tests into KUnit"), we do not have anymore host `#[test]`s that run in the host. Moreover, we do not plan to add any new ones -- tests should generally run within KUnit, since there they are built the same way the kernel does. While we may want to have some way to define tests that can also be run outside the kernel, we still want to test within the kernel too [1], and thus would likely use a custom syntax anyway to define them. Thus simplify the `rusttest` target by removing support for host `#[test]`s for the `kernel` crate. This still maintains the support for the `macros` crate, even though we do not have any such tests there. Link: https://lore.kernel.org/rust-for-linux/CABVgOS=AKHSfifp0S68K3jgNZAkALBr=7iFb=niryG5WDxjSrg@mail.gmail.com/ [1] Signed-off-by: Miguel Ojeda <ojeda@kernel.org> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Reviewed-by: David Gow <davidgow@google.com> Link: https://lore.kernel.org/r/20250726180750.2735836-1-ojeda@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-23Merge tag 'driver-core-6.17-rc3' of ↵Linus Torvalds4-36/+290
git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core Pull driver core fixes from Danilo Krummrich: - Fix swapped handling of lru_gen and lru_gen_full debugfs files in vmscan - Fix debugfs mount options (uid, gid, mode) being silently ignored - Fix leak of devres action in the unwind path of Devres::new() - Documentation: - Expand and fix documentation of (outdated) Device, DeviceContext and generic driver infrastructure - Fix C header link of faux device abstractions - Clarify expected interaction with the security team - Smooth text flow in the security bug reporting process documentation * tag 'driver-core-6.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: Documentation: smooth the text flow in the security bug reporting process Documentation: clarify the expected collaboration with security bugs reporters debugfs: fix mount options not being applied rust: devres: fix leaking call to devm_add_action() rust: faux: fix C header link driver: rust: expand documentation for driver infrastructure device: rust: expand documentation for Device device: rust: expand documentation for DeviceContext mm/vmscan: fix inverted polarity in lru_gen_seq_show()
2025-08-22rust: transmute: add `as_bytes_mut` method to `AsBytes` traitAlexandre Courbot1-0/+15
Types that implement both `AsBytes` and `FromBytes` can be safely modified as a slice of bytes. Add a `as_bytes_mut` method for that purpose. [acourbot@nvidia.com: use fully qualified `core::mem::size_of_val` to build with Rust 1.78.] Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Benno Lossin <lossin@kernel.org> Acked-by: Miguel Ojeda <ojeda@kernel.org> Link: https://lore.kernel.org/r/20250801-as_bytes-v5-2-975f87d5dc85@nvidia.com Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
2025-08-22rust: transmute: add `as_bytes` method for `AsBytes` traitAlexandre Courbot1-1/+11
Every type that implements `AsBytes` should be able to provide its byte representation. Introduce the `as_bytes` method that returns the implementer as a stream of bytes, and provide a default implementation that should be suitable for any type that satisfies `AsBytes`'s safety requirements. [acourbot@nvidia.com: use fully qualified `core::mem::size_of_val` to build with Rust 1.78.] Reviewed-by: Danilo Krummrich <dakr@kernel.org> Reviewed-by: Benno Lossin <lossin@kernel.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> Acked-by: Miguel Ojeda <ojeda@kernel.org> Link: https://lore.kernel.org/r/20250801-as_bytes-v5-1-975f87d5dc85@nvidia.com Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
2025-08-21rust: Add read_poll_timeout functionFUJITA Tomonori2-0/+105
Add read_poll_timeout function which polls periodically until a condition is met, an error occurs, or the timeout is reached. The C's read_poll_timeout (include/linux/iopoll.h) is a complicated macro and a simple wrapper for Rust doesn't work. So this implements the same functionality in Rust. The C version uses usleep_range() while the Rust version uses fsleep(), which uses the best sleep method so it works with spans that usleep_range() doesn't work nicely with. The sleep_before_read argument isn't supported since there is no user for now. It's rarely used in the C version. Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Fiona Behrens <me@kloenk.dev> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Tested-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Tested-by: Daniel Almeida <daniel.almeida@collabora.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Link: https://lore.kernel.org/r/20250821002055.3654160-3-fujita.tomonori@gmail.com [ Fix a minor typo and add missing backticks. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-21rust: Add cpu_relax() helperFUJITA Tomonori2-0/+15
Add cpu_relax() helper in preparation for supporting read_poll_timeout(). Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Acked-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Link: https://lore.kernel.org/r/20250821002055.3654160-2-fujita.tomonori@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-21rust: alloc: implement Box::pin_slice()Alice Ryhl1-0/+77
Add a new constructor to Box to facilitate Box creation from a pinned slice of elements. This allows to efficiently allocate memory for e.g. slices of structrures containing spinlocks or mutexes. Such slices may be used in kmemcache like or zpool API implementations. Signed-off-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Vitaly Wool <vitaly.wool@konsulko.se> Link: https://lore.kernel.org/r/20250811101456.2901694-1-vitaly.wool@konsulko.se [ Add empty lines after struct definitions in the example; end sentences with a period. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-20rust: opp: update ARef and AlwaysRefCounted imports from sync::arefShankari Anand1-6/+7
Update call sites in `opp.rs` to import ARef and AlwaysRefCounted from sync::aref instead of types. This aligns with the ongoing effort to move ARef and AlwaysRefCounted to sync. Suggested-by: Benno Lossin <lossin@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1173 Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2025-08-20rust: drm: update ARef and AlwaysRefCounted imports from sync::arefShankari Anand3-3/+5
Update call sites in drm to import `ARef` and `AlwaysRefCounted` from `sync::aref` instead of `types`. This aligns with the ongoing effort to move `ARef` and `AlwaysRefCounted` to sync. Suggested-by: Benno Lossin <lossin@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1173 Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Reviewed-by: Elle Rhumsaa <elle@weathered-steel.dev> Link: https://lore.kernel.org/r/20250815161706.1324860-1-shankari.ak0208@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-19rust,cred: update AlwaysRefCounted import to sync::arefShankari Anand1-5/+1
Update the import of `AlwaysRefCounted` in `cred.rs` to use `sync::aref` instead of `types`. This is part of the ongoing effort to move `ARef` and `AlwaysRefCounted` to the `sync` module for better modularity. Suggested-by: Benno Lossin <lossin@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1173 Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com> Acked-by: Serge Hallyn <serge@hallyn.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> [PM: subj tweak] Signed-off-by: Paul Moore <paul@paul-moore.com>
2025-08-19rust: fs: update ARef and AlwaysRefCounted imports from sync::arefShankari Anand1-1/+2
Update call sites in the fs subsystem to import `ARef` and `AlwaysRefCounted` from `sync::aref` instead of `types`. This aligns with the ongoing effort to move `ARef` and `AlwaysRefCounted` to sync. Suggested-by: Benno Lossin <lossin@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1173 Acked-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com> Link: https://lore.kernel.org/20250814100101.304408-1-shankari.ak0208@gmail.com Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-08-19rust: pid_namespace: update AlwaysRefCounted imports from sync::arefShankari Anand1-4/+1
Update call sites in `pid_namespace.rs` to import `AlwaysRefCounted` from `sync::aref` instead of `types`. This aligns with the ongoing effort to move `ARef` and `AlwaysRefCounted` to `sync`. Suggested-by: Benno Lossin <lossin@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1173 Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com> Link: https://lore.kernel.org/20250816122323.11657-1-shankari.ak0208@gmail.com Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-08-17rust: alloc: fix `rusttest` by providing `Cmalloc::aligned_layout` tooMiguel Ojeda1-0/+11
Commit fde578c86281 ("rust: alloc: replace aligned_size() with Kmalloc::aligned_layout()") provides a public `aligned_layout` function in `Kamlloc`, but not in `Cmalloc`, and thus uses of it will trigger an error in `rusttest`. Such a user appeared in the following commit 22ab0641b939 ("rust: drm: ensure kmalloc() compatible Layout"): error[E0599]: no function or associated item named `aligned_layout` found for struct `alloc::allocator_test::Cmalloc` in the current scope --> rust/kernel/drm/device.rs:100:31 | 100 | let layout = Kmalloc::aligned_layout(Layout::new::<Self>()); | ^^^^^^^^^^^^^^ function or associated item not found in `Cmalloc` | ::: rust/kernel/alloc/allocator_test.rs:19:1 | 19 | pub struct Cmalloc; | ------------------ function or associated item `aligned_layout` not found for this struct Thus add an equivalent one for `Cmalloc`. Fixes: fde578c86281 ("rust: alloc: replace aligned_size() with Kmalloc::aligned_layout()") Signed-off-by: Miguel Ojeda <ojeda@kernel.org> Link: https://lore.kernel.org/r/20250816204215.2719559-1-ojeda@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-15rust: dma: Update ARef and AlwaysRefCounted imports from sync::arefShankari Anand1-1/+1
Update call sites in the dma subsystem to import `ARef` and `AlwaysRefCounted` from `sync::aref` instead of `types`. This aligns with the ongoing effort to move `ARef` and `AlwaysRefCounted` to sync. Suggested-by: Benno Lossin <lossin@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1173 Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com> Link: https://lore.kernel.org/r/20250814104133.350093-1-shankari.ak0208@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-15rust: driver-core: Update ARef and AlwaysRefCounted imports from sync::arefShankari Anand5-9/+11
Update call sites in the driver-core files and its related samples to import `ARef` and `AlwaysRefCounted` from `sync::aref` instead of `types`. This aligns with the ongoing effort to move `ARef` and `AlwaysRefCounted` to sync. Suggested-by: Benno Lossin <lossin@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1173 Signed-off-by: Shankari Anand <shankari.ak0208@gmail.com> Link: https://lore.kernel.org/r/20250814104615.355106-1-shankari.ak0208@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-15rust: alloc: take the allocator into account for FOREIGN_ALIGNAlice Ryhl2-7/+12
When converting a Box<T> into a void pointer, the allocator might guarantee a higher alignment than the type itself does, and in that case it is guaranteed that the void pointer has that higher alignment. This is quite useful when combined with the XArray, which you can only create using a ForeignOwnable whose FOREIGN_ALIGN is at least 4. This means that you can now always use a Box<T> with the XArray no matter the alignment of T. Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Acked-by: Liam R. Howlett <Liam.Howlett@oracle.com> Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250811-align-min-allocator-v2-2-3386cc94f4fc@google.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-15rust: alloc: specify the minimum alignment of each allocatorAlice Ryhl2-0/+16
The kernel's allocators sometimes provide a higher alignment than the end-user requested, so add a new constant on the Allocator trait to let the allocator specify what its minimum guaranteed alignment is. This allows the ForeignOwnable trait to provide a more accurate value of FOREIGN_ALIGN when using a pointer type such as Box, which will be useful with certain collections such as XArray that store its own data in the low bits of pointers. Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Acked-by: Liam R. Howlett <Liam.Howlett@oracle.com> Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org> Link: https://lore.kernel.org/r/20250811-align-min-allocator-v2-1-3386cc94f4fc@google.com [ Add helper for ARCH_KMALLOC_MINALIGN; remove cast to usize. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-15rust: Add several miscellaneous PCI helpersAlistair Popple1-0/+44
Add bindings to obtain a PCI device's resource start address, bus/ device function, revision ID and subsystem device and vendor IDs. These will be used by the nova-core GPU driver which is currently in development. Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Krzysztof Wilczyński <kwilczynski@kernel.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Gary Guo <gary@garyguo.net> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Benno Lossin <lossin@kernel.org> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Trevor Gross <tmgross@umich.edu> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Rafael J. Wysocki <rafael@kernel.org> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Alexandre Courbot <acourbot@nvidia.com> Cc: linux-pci@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Alistair Popple <apopple@nvidia.com> Link: https://lore.kernel.org/r/20250730013417.640593-2-apopple@nvidia.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-08-15rust: Update PCI binding safety comments and add inline compiler hintAlistair Popple1-2/+6
Update the safety comments to be consistent with other safety comments in the PCI bindings. Also add an inline compiler hint. Suggested-by: Danilo Krummrich <dakr@kernel.org> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Krzysztof Wilczyński <kwilczynski@kernel.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Gary Guo <gary@garyguo.net> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Benno Lossin <lossin@kernel.org> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Trevor Gross <tmgross@umich.edu> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Rafael J. Wysocki <rafael@kernel.org> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Alexandre Courbot <acourbot@nvidia.com> Cc: linux-pci@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Alistair Popple <apopple@nvidia.com> Link: https://lore.kernel.org/r/20250730013417.640593-1-apopple@nvidia.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-12 02:11:36 +0000