The immediate motivation is the Tyr reset infrastructure [1] which needs to serialize reset sensitive hardware access against reset and teardown paths. That reset series started to require many independent dependencies so this SRCU support is split out as a standalone Rust API to keep the reset series focused on the reset logic and easier to review, rebase and land.
[1]: https://lore.kernel.org/all/[email protected] Changes since v1: - Made the owned SRCU read-side guard API unsafe and added a safe closure based helper for callers that do not need to keep the guard. This is to avoid UB on the C side cleanup_srcu_struct where the SRCU struct is freed while there are still active guards, which can happen if the caller leaks the guard e.g., with mem::forget(). - Improved doc comments. v1: https://lore.kernel.org/all/[email protected] Onur Özkan (3): rust: helpers: add SRCU helpers rust: sync: add SRCU abstraction MAINTAINERS: add Rust SRCU files to SRCU entry MAINTAINERS | 3 + rust/helpers/helpers.c | 1 + rust/helpers/srcu.c | 24 +++++++ rust/kernel/sync.rs | 2 + rust/kernel/sync/srcu.rs | 152 +++++++++++++++++++++++++++++++++++++++ 5 files changed, 182 insertions(+) create mode 100644 rust/helpers/srcu.c create mode 100644 rust/kernel/sync/srcu.rs -- 2.51.2
