linux-kernel - [PATCH 00/10] rust: xarray: add entry API with preloading

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Message-Id: <20251203-xarray-entry-send-v1-0-9e5ffd5e3cf0@kernel.org>
Date: Wed, 03 Dec 2025 23:26:30 +0100
From: Andreas Hindborg <a.hindborg@...nel.org>
To: Tamir Duberstein <tamird@...il.com>, Miguel Ojeda <ojeda@...nel.org>, 
 Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
 Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Benno Lossin <lossin@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
 Trevor Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>
Cc: Daniel Gomez <da.gomez@...nel.org>, rust-for-linux@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Andreas Hindborg <a.hindborg@...nel.org>
Subject: [PATCH 00/10] rust: xarray: add entry API with preloading

This patch series is a mashup of cleanups, bugfixes and feature additions for
the Rust XArray abstractions.

 - Patch 1 starts by fixing minor formatting issues and bringing use
   statements up to date with the new coding guidelines.

 - Patch 2-3 add some minor convenience functionality.

 - Patch 4 adds an abstraction for the C `xa_state` structure. This is a
   prerequisite for all the subsequent patches.

 - Patch 5 fixes a double lock error in `xarray::Guard::load`.

 - Patch 6 is a simplifying refactor of `xarray::Guard::load`.

 - Patch 7 adds two new methods for finding items with keys that are larger
   than a given integer.

 - Patch 8-9 add the new entry API with preloading.

 - Patch 10 fixes a lockdep bug caused by reusing the same static key.

I am sorry for the mashup, but I think these changes are easier to handle
in a single series rather than individually.

The feature additions in this series are dependencies for the rust null
block driver, most of which is still downstream.

Best regards,
Andreas

Signed-off-by: Andreas Hindborg <a.hindborg@...nel.org>
---
Andreas Hindborg (10):
      rust: xarray: minor formatting fixes
      rust: xarray: add debug format for `StoreError`
      rust: xarray: add `contains_index` method
      rust: xarray: add `XArrayState`
      rust: xarray: use `xas_load` instead of `xa_load` in `Guard::load`
      rust: xarray: simplify `Guard::load`
      rust: xarray: add `find_next` and `find_next_mut`
      rust: xarray: add entry API
      rust: xarray: add preload API
      rust: xarray: fix false positive lockdep warnings

 MAINTAINERS                     |   1 +
 rust/bindings/bindings_helper.h |   4 +
 rust/helpers/xarray.c           |  22 ++-
 rust/kernel/xarray.rs           | 408 ++++++++++++++++++++++++++++++++++++---
 rust/kernel/xarray/entry.rs     | 415 ++++++++++++++++++++++++++++++++++++++++
 rust/kernel/xarray/preload.rs   | 217 +++++++++++++++++++++
 6 files changed, 1034 insertions(+), 33 deletions(-)
---
base-commit: 7d0a66e4bb9081d75c82ec4957c50034cb0ea449
change-id: 20251203-xarray-entry-send-00230f0744e6

Best regards,
-- 
Andreas Hindborg <a.hindborg@...nel.org>