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2026-01-09rust: sync: atomic: Add store_release/load_acquire testsFUJITA Tomonori
Add minimum store_release/load_acquire tests. Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20251211113826.1299077-5-fujita.tomonori@gmail.com
2026-01-09rust: sync: atomic: Add i8/i16 load and store supportFUJITA Tomonori
Add atomic operation support for i8 and i16 types using volatile read/write and smp_load_acquire/smp_store_release helpers. [boqun: Adjust [1] to avoid introduction of impl_atomic_only_load_and_store_ops!() in the middle] Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com> Link: https://lore.kernel.org/all/20251228120546.1602275-1-fujita.tomonori@gmail.com/ [1] Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20251211113826.1299077-4-fujita.tomonori@gmail.com
2026-01-09rust: sync: atomic: Prepare AtomicOps macros for i8/i16 supportFUJITA Tomonori
Rework the internal AtomicOps macro plumbing to generate per-type implementations from a mapping list. Capture the trait definition once and reuse it for both declaration and per-type impl expansion to reduce duplication and keep future extensions simple. This is a preparatory refactor for enabling i8/i16 atomics cleanly. Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20251228120546.1602275-2-fujita.tomonori@gmail.com
2026-01-09rust: sync: Implement Unpin for ARefAlice Ryhl
The default implementation of Unpin for ARef<T> is conditional on T being Unpin due to its PhantomData<T> field. However, this is overly strict as pointers to T are legal to move even if T itself cannot move. Since commit 66f1ea83d9f8 ("rust: lock: Add a Pin<&mut T> accessor") this causes build failures when combined with a Mutex that contains an field ARef<T>, because almost any type that ARef is used with is !Unpin. Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20251218-unpin-for-aref-v2-1-30d77129cbc6@google.com
2026-01-09rust: sync: set_once: Implement Send and SyncFUJITA Tomonori
Implement Send and Sync for SetOnce<T> to allow it to be used across thread boundaries. Send: SetOnce<T> can be transferred across threads when T: Send, as the contained value is also transferred and will be dropped on the destination thread. Sync: SetOnce<T> can be shared across threads when T: Sync, as as_ref() provides shared references &T and atomic operations ensure proper synchronization. Since the inner T may be dropped on any thread, we also require T: Send. Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Gary Guo <gary@garyguo.net> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20251216000901.221375-1-fujita.tomonori@gmail.com
2026-01-09rust: sync: Clean up LockClassKey and its docsAlice Ryhl
Several aspects of the code and documentation for this type is incomplete. Also several things are hidden from the docs. Thus, clean it up and make it easier to read the rendered html docs. Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20250811-lock-class-key-cleanup-v3-2-b12967ee1ca2@google.com
2026-01-09rust: sync: Refactor static_lock_class!() macroAlice Ryhl
By introducing a new_static() constructor, the macro does not need to go through MaybeUninit::uninit().assume_init(), which is a pattern that is best avoided when possible. The safety comment not only requires that the value is leaked, but also that it is stored in the right portion of memory. This is so that the lockdep static_obj() check will succeed when using this constructor. One could argue that lockdep detects this scenario, so that safety requirement isn't needed. However, it simplifies matters to require that static_obj() will succeed and it's not a burdensome requirement on the caller. Suggested-by: Benno Lossin <lossin@kernel.org> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20250811-lock-class-key-cleanup-v3-1-b12967ee1ca2@google.com
2026-01-07rust: faux: use "kernel vertical" style for importsDanilo Krummrich
Convert all imports to use "kernel vertical" style. With this, subsequent patches neither introduce unrelated changes nor leave an inconsistent import pattern. While at it, drop unnecessary imports covered by prelude::*. Link: https://docs.kernel.org/rust/coding-guidelines.html#imports Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://patch.msgid.link/20260105142123.95030-5-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-01-07rust: driver-core: use "kernel vertical" style for importsDanilo Krummrich
Convert all imports to use "kernel vertical" style. With this, subsequent patches neither introduce unrelated changes nor leave an inconsistent import pattern. While at it, drop unnecessary imports covered by prelude::*. Link: https://docs.kernel.org/rust/coding-guidelines.html#imports Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://patch.msgid.link/20260105142123.95030-3-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-01-07rust: platform: use "kernel vertical" style for importsDanilo Krummrich
Convert all imports to use "kernel vertical" style. With this, subsequent patches neither introduce unrelated changes nor leave an inconsistent import pattern. While at it, drop unnecessary imports covered by prelude::*. Link: https://docs.kernel.org/rust/coding-guidelines.html#imports Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://patch.msgid.link/20260105142123.95030-2-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-01-07rust: auxiliary: use "kernel vertical" style for importsDanilo Krummrich
Convert all imports to use "kernel vertical" style. With this, subsequent patches neither introduce unrelated changes nor leave an inconsistent import pattern. While at it, drop unnecessary imports covered by prelude::*. Link: https://docs.kernel.org/rust/coding-guidelines.html#imports Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://patch.msgid.link/20260105142123.95030-1-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-01-07rust: usb: use "kernel vertical" style for importsDanilo Krummrich
Convert all imports to use "kernel vertical" style. With this, subsequent patches neither introduce unrelated changes nor leave an inconsistent import pattern. While at it, drop unnecessary imports covered by prelude::*. Link: https://docs.kernel.org/rust/coding-guidelines.html#imports Signed-off-by: Danilo Krummrich <dakr@kernel.org> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20260105142123.95030-4-dakr@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-01-06rust: drm: Improve safety comment when using `Pin::into_inner_unchecked`Ewan Chorynski
The safety requirements for `Pin::into_inner_unchecked` state that the returned pointer must be treated as pinned until it is dropped. Such a guarantee is provided by the `ARef` type. This patch improves the safety comment to better reflect this. Signed-off-by: Ewan Chorynski <ewan.chorynski@ik.me> Link: https://patch.msgid.link/20251228-drm-gem-safety-comment-v2-1-99bb861c3371@ik.me Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-01-06rust: io: remove square brackets from pci::Bar referenceMarko Turk
Remove square brackets since this section is not a part of doc-comment so the reference will not be converted to a link in the generated docs. Suggested-by: Danilo Krummrich <dakr@kernel.org> Signed-off-by: Marko Turk <mt@markoturk.info> Link: https://patch.msgid.link/20260105213726.73000-1-mt@markoturk.info Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-01-06rust: device: Remove explicit import of CStrExtFUJITA Tomonori
Remove the explicit import of CStrExt. When CONFIG_PRINTK is disabled this import causes a build error: error: unused import: `crate::str::CStrExt` --> rust/kernel/device.rs:17:5 | 17 | use crate::str::CStrExt as _; | ^^^^^^^^^^^^^^^^^^^ | = note: `-D unused-imports` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(unused_imports)]` error: aborting due to 1 previous error CStrExt is covered by prelude::* so the explicit import is redundant. Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Fixes: 3b83f5d5e78a ("rust: replace `CStr` with `core::ffi::CStr`") Link: https://patch.msgid.link/20260106000320.2593800-1-fujita.tomonori@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-01-06rust: num: bounded: mark __new as unsafeHsiu Che Yu
The `Bounded::__new()` constructor relies on the caller to ensure the value can be represented within N bits. Failing to uphold this requirement breaks the type invariant. Mark it as unsafe and document this requirement in a Safety section to make the contract explicit. Update all call sites to use unsafe blocks and change their comments from `INVARIANT:` to `SAFETY:`, as they are now justifying unsafe operations rather than establishing type invariants. Fixes: 01e345e82ec3a ("rust: num: add Bounded integer wrapping type") Link: https://lore.kernel.org/all/aS1qC_ol2XEpZ44b@google.com/ Reported-by: Miguel Ojeda <ojeda@kernel.org> Closes: https://github.com/Rust-for-Linux/linux/issues/1211 Signed-off-by: Hsiu Che Yu <yu.whisper.personal@gmail.com> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Link: https://patch.msgid.link/20251204033849.23480-1-yu.whisper.personal@gmail.com Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2026-01-06rust: pci: fix typos in Bar struct's commentsMarko Turk
Fix a typo in the doc-comment of the Bar structure: 'inststance -> instance'. Add also 'is' to the comment inside Bar's `new()` function (suggested by Dirk): // `pdev` is valid by the invariants of `Device`. Fixes: bf9651f84b4e ("rust: pci: implement I/O mappable `pci::Bar`") Suggested-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Marko Turk <mt@markoturk.info> Reviewed-by: Dirk Behme <dirk.behme@de.bosch.com> Link: https://patch.msgid.link/20260105213726.73000-2-mt@markoturk.info Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-01-05rust: net: replace `kernel::c_str!` with C-StringsTamir Duberstein
C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Reviewed-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Tamir Duberstein <tamird@gmail.com> Link: https://patch.msgid.link/20260103-cstr-net-v2-1-8688f504b85d@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-01-04rust: num: fix typos in Bounded documentationNakamura Shuta
Fix several typos and grammatical errors in the Bounded type documentation: - "less significant bits" -> "least significant bits" - "with in" -> "within" - "withheld" -> "upheld" - "// This" -> "// This" (double space) - "doesn't fits" -> "doesn't fit" (2 occurrences) Reported-by: Miguel Ojeda <ojeda@kernel.org> Closes: https://github.com/Rust-for-Linux/linux/issues/1210 Signed-off-by: Nakamura Shuta <nakamura.shuta@gmail.com> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Yury Norov (NVIDIA) <yury.norov@nvidia.com> Fixes: 01e345e82ec3 ("rust: num: add Bounded integer wrapping type") Link: https://patch.msgid.link/20251204024336.246587-1-nakamura.shuta@gmail.com [ Removed Link tag due to duplicated URL. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2026-01-04rust: fmt: Fix grammar in Adapter descriptionDirk Behme
Add a missing `and` in the description of the `Adapter`. Fixes: c5cf01ba8dfe ("rust: support formatting of foreign types") Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> Acked-by: Tamir Duberstein <tamird@gmail.com> Link: https://patch.msgid.link/20260102084821.1077864-1-dirk.behme@de.bosch.com [ Reworded for typo. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2026-01-04rust: rbtree: fix documentation typo in CursorMut peek_next methodHang Shu
The peek_next method's doc comment incorrectly stated it accesses the "previous" node when it actually accesses the next node. Fix the documentation to accurately reflect the method's behavior. Fixes: 98c14e40e07a ("rust: rbtree: add cursor") Reviewed-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Hang Shu <m18080292938@163.com> Reported-by: Miguel Ojeda <ojeda@kernel.org> Closes: https://github.com/Rust-for-Linux/linux/issues/1205 Cc: stable@vger.kernel.org Reviewed-by: Gary Guo <gary@garyguo.net> Link: https://patch.msgid.link/20251107093921.3379954-1-m18080292938@163.com [ Reworded slightly. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2026-01-04rust: rbtree: fix minor typo in commentAtharv Dubey
Fix a typo in a comment to improve clarity and readability. Suggested-by: Miguel Ojeda <ojeda@kernel.org> Link: https://github.com/Rust-for-Linux/linux/issues/1206 Signed-off-by: Atharv Dubey <atharvd440@gmail.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Link: https://patch.msgid.link/20251201165601.31484-1-atharvd440@gmail.com [ Removed one of the cases that is gone now. Reworded accordingly (and to avoid mentioning 'documentation', since it is just a comment). - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2026-01-02rust: device: fix broken intra-doc linksFUJITA Tomonori
The `pci` module is conditional on CONFIG_PCI. When it's disabled, the intra-doc link to `pci::Device` causes rustdoc warnings: warning: unresolved link to `kernel::pci::Device` --> rust/kernel/device.rs:163:22 | 163 | /// [`pci::Device`]: kernel::pci::Device | ^^^^^^^^^^^^^^^^^^^ no item named `pci` in module `kernel` | = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default Fix this by making the documentation conditional on CONFIG_PCI. Fixes: d6e26c1ae4a6 ("device: rust: expand documentation for Device") Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Reviewed-by: Dirk Behme <dirk.behme@de.bosch.com> Link: https://patch.msgid.link/20251231045728.1912024-2-fujita.tomonori@gmail.com [ Keep the "such as" part indicating a list of examples; fix typos in commit message. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-01-02rust: dma: fix broken intra-doc linksFUJITA Tomonori
The `pci` module is conditional on CONFIG_PCI. When it's disabled, the intra-doc link to `pci::Device` causes rustdoc warnings: warning: unresolved link to `::kernel::pci::Device` --> rust/kernel/dma.rs:30:70 | 30 | /// where the underlying bus is DMA capable, such as [`pci::Device`](::kernel::pci::Device) or | ^^^^^^^^^^^^^^^^^^^^^ no item named `pci` in module `kernel` Fix this by making the documentation conditional on CONFIG_PCI. Fixes: d06d5f66f549 ("rust: dma: implement `dma::Device` trait") Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Reviewed-by: Dirk Behme <dirk.behme@de.bosch.com> Link: https://patch.msgid.link/20251231045728.1912024-1-fujita.tomonori@gmail.com [ Keep the "such as" part indicating a list of examples; fix typos in commit message. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-30rust: driver: fix broken intra-doc links to example driver typesAlice Ryhl
The `auxiliary` and `pci` modules are conditional on `CONFIG_AUXILIARY_BUS` and `CONFIG_PCI` respectively. When these are disabled, the intra-doc links to `auxiliary::Driver` and `pci::Driver` break, causing rustdoc warnings (or errors with `-D warnings`). error: unresolved link to `kernel::auxiliary::Driver` --> rust/kernel/driver.rs:82:28 | 82 | //! [`auxiliary::Driver`]: kernel::auxiliary::Driver | ^^^^^^^^^^^^^^^^^^^^^^^^^ no item named `auxiliary` in module `kernel` Fix this by making the documentation for these examples conditional on the corresponding configuration options. Fixes: 970a7c68788e ("driver: rust: expand documentation for driver infrastructure") Signed-off-by: Alice Ryhl <aliceryhl@google.com> Reported-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Closes: https://lore.kernel.org/rust-for-linux/20251209.151817.744108529426448097.fujita.tomonori@gmail.com/ Link: https://patch.msgid.link/20251227-driver-types-v1-1-1916154fbe5e@google.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-29rust: Return Option from page_align and ensure no usize overflowBrendan Shephard
Change `page_align()` to return `Option<usize>` to allow validation of the provided `addr` value. This ensures that any value that is within one `PAGE_SIZE` of `usize::MAX` will not panic, and instead returns `None` to indicate overflow. Signed-off-by: Brendan Shephard <bshephar@bne-home.net> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251223055647.9761-1-bshephar@bne-home.net [ Use kernel vertical style for imports; use markdown in comments. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-29rust: device_id: replace incorrect word in safety documentationYilin Chen
The safety documentation incorrectly refers to `RawDeviceId` when transmuting to `RawType`. This fixes the documentation to correctly indicate that implementers must ensure layout compatibility with `RawType`, not `RawDeviceId`. Fixes: 9b90864bb42b ("rust: implement `IdArray`, `IdTable` and `RawDeviceId`") Signed-off-by: Yilin Chen <1479826151@qq.com> Link: https://patch.msgid.link/tencent_C18DD5047749311142ED455779C7CCCF3A08@qq.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-29rust: dma: remove incorrect safety documentationYilin Chen
Removes a safety requirement that incorrectly states callers must ensure the device does not access memory while the returned slice is live, as this method doesn't return a slice. Fixes: d37a39f607c4 ("rust: dma: add as_slice/write functions for CoherentAllocation") Signed-off-by: Yilin Chen <1479826151@qq.com> Link: https://patch.msgid.link/tencent_5195C0324923A2B67DEF8AE4B8E139BCB105@qq.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-29rust: sync: add Arc::DATA_OFFSETAlice Ryhl
This constant will be used to expose some offset constants from the Rust Binder driver to tracepoints which are implemented in C. The constant is usually equal to sizeof(refcount_t), but may be larger if T has a large alignment. Signed-off-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251203-binder-trace1-v1-1-22d3ffddb44e@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-12-29rust: miscdevice: use `pin_init::zeroed()` for C type initializationAtharv Dubey
Replace manual zero-initialization using `MaybeUninit::zeroed().assume_init()` with `pin_init::zeroed()`. The `pin_init` helper provides a safer and clearer API for zero-initializing C structs without requiring an `unsafe` block. Link: https://github.com/Rust-for-Linux/linux/issues/1189 Signed-off-by: Atharv Dubey <atharvd440@gmail.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Link: https://patch.msgid.link/20251129121513.20738-1-atharvd440@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-12-28rust: Add soc_device supportMatthew Maurer
Allow SoC drivers in Rust to present metadata about their devices to userspace through /sys/devices/socX and other drivers to identify their properties through `soc_device_match`. Signed-off-by: Matthew Maurer <mmaurer@google.com> Link: https://patch.msgid.link/20251226-soc-bindings-v4-1-2c2fac08f820@google.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-23rust: maple_tree: rcu_read_lock() in destructor to silence lockdepAlice Ryhl
When running the Rust maple tree kunit tests with lockdep, you may trigger a warning that looks like this: lib/maple_tree.c:780 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 no locks held by kunit_try_catch/344. stack backtrace: CPU: 3 UID: 0 PID: 344 Comm: kunit_try_catch Tainted: G N 6.19.0-rc1+ #2 NONE Tainted: [N]=TEST Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x71/0x90 lockdep_rcu_suspicious+0x150/0x190 mas_start+0x104/0x150 mas_find+0x179/0x240 _RINvNtCs5QSdWC790r4_4core3ptr13drop_in_placeINtNtCs1cdwasc6FUb_6kernel10maple_tree9MapleTreeINtNtNtBL_5alloc4kbox3BoxlNtNtB1x_9allocator7KmallocEEECsgxAQYCfdR72_25doctests_kernel_generated+0xaf/0x130 rust_doctest_kernel_maple_tree_rs_0+0x600/0x6b0 ? lock_release+0xeb/0x2a0 ? kunit_try_catch_run+0x210/0x210 kunit_try_run_case+0x74/0x160 ? kunit_try_catch_run+0x210/0x210 kunit_generic_run_threadfn_adapter+0x12/0x30 kthread+0x21c/0x230 ? __do_trace_sched_kthread_stop_ret+0x40/0x40 ret_from_fork+0x16c/0x270 ? __do_trace_sched_kthread_stop_ret+0x40/0x40 ret_from_fork_asm+0x11/0x20 </TASK> This is because the destructor of maple tree calls mas_find() without taking rcu_read_lock() or the spinlock. Doing that is actually ok in this case since the destructor has exclusive access to the entire maple tree, but it triggers a lockdep warning. To fix that, take the rcu read lock. In the future, it's possible that memory reclaim could gain a feature where it reallocates entries in maple trees even if no user-code is touching it. If that feature is added, then this use of rcu read lock would become load-bearing, so I did not make it conditional on lockdep. We have to repeatedly take and release rcu because the destructor of T might perform operations that sleep. Link: https://lkml.kernel.org/r/20251217-maple-drop-rcu-v1-1-702af063573f@google.com Fixes: da939ef4c494 ("rust: maple_tree: add MapleTree") Signed-off-by: Alice Ryhl <aliceryhl@google.com> Reported-by: Andreas Hindborg <a.hindborg@kernel.org> Closes: https://rust-for-linux.zulipchat.com/#narrow/channel/x/topic/x/near/564215108 Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Cc: Andrew Ballance <andrewjballance@gmail.com> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> 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>
2025-12-22rust: debugfs: replace `kernel::c_str!` with C-StringsTamir Duberstein
C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Signed-off-by: Tamir Duberstein <tamird@gmail.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251222-cstr-driver-core-v1-6-1142a177d0fd@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-22rust: irq: replace `kernel::c_str!` with C-StringsTamir Duberstein
C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Signed-off-by: Tamir Duberstein <tamird@gmail.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251222-cstr-driver-core-v1-5-1142a177d0fd@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-22rust: io: replace `kernel::c_str!` with C-StringsTamir Duberstein
C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Signed-off-by: Tamir Duberstein <tamird@gmail.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251222-cstr-driver-core-v1-4-1142a177d0fd@gmail.com [ Use kernel vertical import style. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-22rust: platform: replace `kernel::c_str!` with C-StringsTamir Duberstein
C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Tamir Duberstein <tamird@gmail.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251222-cstr-driver-core-v1-3-1142a177d0fd@gmail.com [ Use kernel vertical import style; discard unrelated faux changes. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-22rust: device: replace `kernel::c_str!` with C-StringsTamir Duberstein
C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Tamir Duberstein <tamird@gmail.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251222-cstr-driver-core-v1-2-1142a177d0fd@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-22rust: debugfs: use "kernel vertical" style for importsDanilo Krummrich
Convert all imports in the debugfs Rust module to use "kernel vertical" style. With this subsequent patches neither introduce unrelated changes nor leave an inconsistent import pattern. While at it, drop unnecessary imports covered by prelude::*. Link: https://docs.kernel.org/rust/coding-guidelines.html#imports Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://patch.msgid.link/20251218165626.450264-1-dakr@kernel.org [ Apply the same change to the debugfs sample code. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-22rust: regulator: replace `kernel::c_str!` with C-StringsTamir Duberstein
C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible. Signed-off-by: Tamir Duberstein <tamird@gmail.com> Reviewed-by: Daniel Almeida <Daniel.almeida@collabora.com> Link: https://patch.msgid.link/20251222-cstr-regulator-v1-1-430e3d517025@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2025-12-18rust: scatterlist: Update ARef imports to use sync::arefShankari Anand
Update call sites in `scatterlist.rs` to import `ARef` 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://patch.msgid.link/20251123092438.182251-8-shankari.ak0208@gmail.com [ Change subject prefix to from 'kernel' to 'scatterlist'. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-18rust: device: Update ARef and AlwaysRefCounted imports from sync::arefShankari Anand
Update call sites 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://patch.msgid.link/20251123092438.182251-4-shankari.ak0208@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-18rust: drm: use `pin_init::zeroed()` for file operations initializationAtharv Dubey
Replace the manual `unsafe { core::mem::zeroed() }` initialization of `bindings::file_operations` with `pin_init::zeroed()`. This removes the explicit unsafe Signed-off-by: Atharv Dubey <atharvd440@gmail.com> Link: https://patch.msgid.link/20251201152759.16429-1-atharvd440@gmail.com Signed-off-by: Alice Ryhl <aliceryhl@google.com>
2025-12-18rust: drm: Update AlwaysRefCounted imports to use sync::arefShankari Anand
Update call sites 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://patch.msgid.link/20251123092438.182251-5-shankari.ak0208@gmail.com Signed-off-by: Alice Ryhl <aliceryhl@google.com>
2025-12-17rust: pci: document Bar's endianness conversionMarko Turk
Document that the Bar's MMIO backend always assumes little-endian devices and that its operations automatically convert to CPU endianness. Signed-off-by: Marko Turk <mt@markoturk.info> Link: https://lore.kernel.org/lkml/DE7F6RR1NAKW.3DJYO44O73941@kernel.org/ Link: https://patch.msgid.link/20251210112503.62925-1-mt@markoturk.info [ Drop unrelated spelling fix. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2025-12-06Merge tag 'usb-6.19-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB/Thunderbolt updates from Greg KH: "Here is the big set of USB and Thunderbolt driver updates for 6.19-rc1. Nothing major here, just lots of tiny updates for most of the common USB drivers. Included in here are: - more xhci driver updates and fixes - Thunderbolt driver cleanups - usb serial driver updates - typec driver updates - USB tracepoint additions - dwc3 driver updates, including support for Apple hardware - lots of other smaller driver updates and cleanups All of these have been in linux-next for a while with no reported issues" * tag 'usb-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (161 commits) usb: gadget: tegra-xudc: Always reinitialize data toggle when clear halt USB: serial: option: move Telit 0x10c7 composition in the right place USB: serial: option: add Telit Cinterion FE910C04 new compositions usb: typec: ucsi: fix use-after-free caused by uec->work usb: typec: ucsi: fix probe failure in gaokun_ucsi_probe() usb: dwc3: core: Remove redundant comment in core init usb: phy: Initialize struct usb_phy list_head USB: serial: option: add Foxconn T99W760 usb: usb-storage: No additional quirks need to be added to the EL-R12 optical drive. usb: typec: hd3ss3220: Enable VBUS based on ID pin state dt-bindings: usb: ti,hd3ss3220: Add support for VBUS based on ID state usb: typec: anx7411: add WQ_PERCPU to alloc_workqueue users USB: add WQ_PERCPU to alloc_workqueue users dt-bindings: usb: dwc3-xilinx: Describe the reset constraint for the versal platform drivers/usb/storage: use min() instead of min_t() usb: raw-gadget: cap raw_io transfer length to KMALLOC_MAX_SIZE usb: ohci-da8xx: remove unused platform data usb: gadget: functionfs: use dma_buf_unmap_attachment_unlocked() helper usb: uas: reduce time under spinlock usb: dwc3: eic7700: Add EIC7700 USB driver ...
2025-12-06Merge tag 'char-misc-6.19-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc/IIO driver updates from Greg KH: "Here is the big set of char/misc/iio driver updates for 6.19-rc1. Lots of stuff in here including: - lots of IIO driver updates, cleanups, and additions - large interconnect driver changes as they get converted over to a dynamic system of ids - coresight driver updates - mwave driver updates - binder driver updates and changes - comedi driver fixes now that the fuzzers are being set loose on them - nvmem driver updates - new uio driver addition - lots of other small char/misc driver updates, full details in the shortlog All of these have been in linux-next for a while now" * tag 'char-misc-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (304 commits) char: applicom: fix NULL pointer dereference in ac_ioctl hangcheck-timer: fix coding style spacing hangcheck-timer: Replace %Ld with %lld hangcheck-timer: replace printk(KERN_CRIT) with pr_crit uio: Add SVA support for PCI devices via uio_pci_generic_sva.c dt-bindings: slimbus: fix warning from example intel_th: Fix error handling in intel_th_output_open misc: rp1: Fix an error handling path in rp1_probe() char: xillybus: add WQ_UNBOUND to alloc_workqueue users misc: bh1770glc: use pm_runtime_resume_and_get() in power_state_store misc: cb710: Fix a NULL vs IS_ERR() check in probe() mux: mmio: Add suspend and resume support virt: acrn: split acrn_mmio_dev_res out of acrn_mmiodev greybus: gb-beagleplay: Fix timeout handling in bootloader functions greybus: add WQ_PERCPU to alloc_workqueue users char/mwave: drop typedefs char/mwave: drop printk wrapper char/mwave: remove printk tracing char/mwave: remove unneeded fops char/mwave: remove MWAVE_FUTZ_WITH_OTHER_DEVICES ifdeffery ...
2025-12-06Merge tag 'bitmap-for-6.19' of github.com:/norov/linuxLinus Torvalds
Pull bitmap updates from Yury Norov: - Runtime field_{get,prep}() (Geert) - Rust ID pool updates (Alice) - min_t() simplification (David) - __sw_hweightN kernel-doc fixes (Andy) - cpumask.h headers cleanup (Andy) * tag 'bitmap-for-6.19' of github.com:/norov/linux: (32 commits) rust_binder: use bitmap for allocation of handles rust: id_pool: do not immediately acquire new ids rust: id_pool: do not supply starting capacity rust: id_pool: rename IdPool::new() to with_capacity() rust: bitmap: add BitmapVec::new_inline() rust: bitmap: add MAX_LEN and MAX_INLINE_LEN constants cpumask: Don't use "proxy" headers soc: renesas: Use bitfield helpers clk: renesas: Use bitfield helpers ALSA: usb-audio: Convert to common field_{get,prep}() helpers soc: renesas: rz-sysc: Convert to common field_get() helper pinctrl: ma35: Convert to common field_{get,prep}() helpers iio: mlx90614: Convert to common field_{get,prep}() helpers iio: dac: Convert to common field_prep() helper gpio: aspeed: Convert to common field_{get,prep}() helpers EDAC/ie31200: Convert to common field_get() helper crypto: qat - convert to common field_get() helper clk: at91: Convert to common field_{get,prep}() helpers bitfield: Add non-constant field_{prep,get}() helpers bitfield: Add less-checking __FIELD_{GET,PREP}() ...
2025-12-06rust: sync: atomic: separate import "blocks"Miguel Ojeda
Commit 14e9a18b07ec ("rust: sync: atomic: Make Atomic*Ops pub(crate)") added a `pub(crate)` import in the same "block" as the `pub` one, without running `rustfmt`, which would sort them differently. Instead of running `rustfmt` as-is, add a newline to keep the import "blocks" with different visibilities separate. Signed-off-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2025-12-06Merge tag 'modules-6.19-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux Pull module updates from Daniel Gomez: "Rust module parameter support: - Add Rust module parameter support, enabling Rust kernel modules to declare and use module parameters. The rust_minimal sample module demonstrates this, and the rust null block driver will be the first to use it in the next cycle. This also adds the Rust module files under the modules subsystem as agreed between the Rust and modules maintainers. Hardening: - Add compile-time check for embedded NUL characters in MODULE_*() macros. This module metadata was once used (and maybe still) to bypass license enforcement (LWN article from 2003): https://lwn.net/Articles/82305/ [1] MAINTAINERS: - Add Aaron Tomlin as reviewer for the Modules subsystem" * tag 'modules-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux: MAINTAINERS: Add myself as reviewer for module support module: Add compile-time check for embedded NUL characters media: radio: si470x: Fix DRIVER_AUTHOR macro definition media: dvb-usb-v2: lmedm04: Fix firmware macro definitions modules: add rust modules files to MAINTAINERS rust: samples: add a module parameter to the rust_minimal sample rust: module: update the module macro with module parameter support rust: module: use a reference in macros::module::module rust: introduce module_param module rust: str: add radix prefixed integer parsing functions rust: sync: add `SetOnce`
2025-12-05Merge tag 'driver-core-6.19-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core Pull driver core updates from Danilo Krummrich: "Arch Topology: - Move parse_acpi_topology() from arm64 to common code for reuse in RISC-V CPU: - Expose housekeeping CPUs through /sys/devices/system/cpu/housekeeping - Print a newline (or 0x0A) instead of '(null)' reading /sys/devices/system/cpu/nohz_full when nohz_full= is not set debugfs - Remove (broken) 'no-mount' mode - Remove redundant access mode checks in debugfs_get_tree() and debugfs_create_*() functions Devres: - Remove unused devm_free_percpu() helper - Move devm_alloc_percpu() from device.h to devres.h Firmware Loader: - Replace simple_strtol() with kstrtoint() - Do not call cancel_store() when no upload is in progress kernfs: - Increase struct super_block::maxbytes to MAX_LFS_FILESIZE - Fix a missing unwind path in __kernfs_new_node() Misc: - Increase the name size in struct auxiliary_device_id to 40 characters - Replace system_unbound_wq with system_dfl_wq and add WQ_PERCPU to alloc_workqueue() Platform: - Replace ERR_PTR() with IOMEM_ERR_PTR() in platform ioremap functions Rust: - Auxiliary: - Unregister auxiliary device on parent device unbind - Move parent() to impl Device; implement device context aware parent() for Device<Bound> - Illustrate how to safely obtain a driver's device private data when calling from an auxiliary driver into the parant device driver - DebugFs: - Implement support for binary large objects - Device: - Let probe() return the driver's device private data as pinned initializer, i.e. impl PinInit<Self, Error> - Implement safe accessor for a driver's device private data for Device<Bound> (returned reference can't out-live driver binding and guarantees the correct private data type) - Implement AsBusDevice trait, to be used by class device abstractions to derive the bus device type of the parent device - DMA: - Store raw pointer of allocation as NonNull - Use start_ptr() and start_ptr_mut() to inherit correct mutability of self - FS: - Add file::Offset type alias - I2C: - Add abstractions for I2C device / driver infrastructure - Implement abstractions for manual I2C device registrations - I/O: - Use "kernel vertical" style for imports - Define ResourceSize as resource_size_t - Move ResourceSize to top-level I/O module - Add type alias for phys_addr_t - Implement Rust version of read_poll_timeout_atomic() - PCI: - Use "kernel vertical" style for imports - Move I/O and IRQ infrastructure to separate files - Add support for PCI interrupt vectors - Implement TryInto<IrqRequest<'a>> for IrqVector<'a> to convert an IrqVector bound to specific pci::Device into an IrqRequest bound to the same pci::Device's parent Device - Leverage pin_init_scope() to get rid of redundant Result in IRQ methods - PinInit: - Add {pin_}init_scope() to execute code before creating an initializer - Platform: - Leverage pin_init_scope() to get rid of redundant Result in IRQ methods - Timekeeping: - Implement abstraction of udelay() - Uaccess: - Implement read_slice_partial() and read_slice_file() for UserSliceReader - Implement write_slice_partial() and write_slice_file() for UserSliceWriter sysfs: - Prepare the constification of struct attribute" * tag 'driver-core-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (75 commits) rust: pci: fix build failure when CONFIG_PCI_MSI is disabled debugfs: Fix default access mode config check debugfs: Remove broken no-mount mode debugfs: Remove redundant access mode checks driver core: Check drivers_autoprobe for all added devices driver core: WQ_PERCPU added to alloc_workqueue users driver core: replace use of system_unbound_wq with system_dfl_wq tick/nohz: Expose housekeeping CPUs in sysfs tick/nohz: avoid showing '(null)' if nohz_full= not set sysfs/cpu: Use DEVICE_ATTR_RO for nohz_full attribute kernfs: fix memory leak of kernfs_iattrs in __kernfs_new_node fs/kernfs: raise sb->maxbytes to MAX_LFS_FILESIZE mod_devicetable: Bump auxiliary_device_id name size sysfs: simplify attribute definition macros samples/kobject: constify 'struct foo_attribute' samples/kobject: add is_visible() callback to attribute group sysfs: attribute_group: enable const variants of is_visible() sysfs: introduce __SYSFS_FUNCTION_ALTERNATIVE() sysfs: transparently handle const pointers in ATTRIBUTE_GROUPS() sysfs: attribute_group: allow registration of const attribute ...
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