[PATCH v2 00/13] `Zeroable` improvements & bindings integration

[Benno Lossin <lossin@kernel.org>]

Depends on the pin-init test & CI fixes sync [1].

This came from a discussion at [2]. And I added some more useful parts
to the original idea.

I'm not sure on the impact of build times and rust-analyzer. We're
adding a derive macro to every struct and union emitted by bindgen.
Building using my test-config took 27.7s before and 28.2s after this
change, but those are only two runs on my machine with a very reduced
config (that enables all Rust code that we have at the moment).

Maybe we have to reevaluate this when more C code is scanned by bindgen.

[1]: https://rust-for-linux.zulipchat.com/#narrow/channel/291565-Help/topic/Zeroable.20trait.20for.20C.20structs/with/509711564
[2]: https://lore.kernel.org/all/20250523125424.192843-1-lossin@kernel.org

Changelog
=========
* v2:
  - added patches with more extensive pin-init changes to `Zeroable` &
    related methods. for the upstream PR, see
    https://github.com/Rust-for-Linux/pin-init/pull/56
  - added patches replacing usage of `mem::zeroed` and
    `MaybeUninit::zeroed().assume_init()` with the new
    `pin_init::zeroed`
  - fix rust-analyzer support 
  - use import in `{uapi,bindings}/lib.rs` to avoid the `pin_init::`
    prefix
* v1: https://lore.kernel.org/all/20250520192307.259142-1-lossin@kernel.org

Benno Lossin (13):
  rust: pin-init: rename `zeroed` to `init_zeroed`
  rust: pin-init: add `Zeroable::init_zeroed`
  rust: pin-init: add `zeroed()` & `Zeroable::zeroed()` functions
  rust: pin-init: implement `ZeroableOption` for `&T` and `&mut T`
  rust: pin-init: change `impl Zeroable for Option<NonNull<T>>` to
    `ZeroableOption for NonNull<T>`
  rust: pin-init: implement `ZeroableOption` for function pointers with
    up to 20 arguments
  rust: add `pin-init` as a dependency to `bindings` and `uapi`
  rust: derive `Zeroable` for all structs & unions generated by bindgen
    where possible
  rust: miscdevice: replace `MaybeUninit::zeroed().assume_init` with
    `pin_init::zeroed`
  rust: phy: replace `MaybeUninit::zeroed().assume_init` with
    `pin_init::zeroed`
  rust: block: replace `core::mem::zeroed` with `pin_init::zeroed`
  rust: of: replace `core::mem::zeroed` with `pin_init::zeroed`
  rust: security: replace `core::mem::zeroed` with `pin_init::zeroed`

 rust/Makefile                                 |   6 +-
 rust/bindgen_parameters                       |   4 +
 rust/bindings/lib.rs                          |   8 ++
 rust/kernel/block/mq/gen_disk.rs              |   3 +-
 rust/kernel/block/mq/tag_set.rs               |   4 +-
 rust/kernel/init.rs                           |   8 +-
 rust/kernel/miscdevice.rs                     |   8 +-
 rust/kernel/net/phy.rs                        |   4 +-
 rust/kernel/of.rs                             |   4 +-
 rust/kernel/security.rs                       |   3 +-
 rust/pin-init/README.md                       |   2 +-
 rust/pin-init/examples/big_struct_in_place.rs |   4 +-
 rust/pin-init/src/lib.rs                      | 120 +++++++++++++++---
 rust/pin-init/src/macros.rs                   |  16 +--
 rust/uapi/lib.rs                              |   2 +
 scripts/generate_rust_analyzer.py             |   4 +-
 16 files changed, 147 insertions(+), 53 deletions(-)


base-commit: ae8b3a83fb9de394f609035041cd7a668fda2ab3
prerequisite-patch-id: 8d7ade67c2e5189bf8a2c91253d925e25744cba5
prerequisite-patch-id: 0ebbd4a86bebeff23257870db92a1b0fe017c481
prerequisite-patch-id: 1437fc7adeff6e13abd433594da923272b9388bf
-- 
2.49.0