On Sat Jun 13, 2026 at 7:40 AM BST, Onur Özkan wrote: > Add a Rust abstraction for sleepable RCU (SRCU), backed by C srcu_struct. > Provide FFI helpers and a safe wrapper with a guard-based API for read-side > critical sections. > > Cleanup is handled via `PinnedDrop`. It first checks for active read-side > sections and emits a warning if any guards were leaked. In that case, it > waits in `synchronize_srcu()` rather than risking a UAF by freeing the > `srcu_struct` that is still reachable from the C side. It then uses > `srcu_barrier()` to drain pending callbacks before finally calling > `cleanup_srcu_struct()`. > > Signed-off-by: Onur Özkan <[email protected]>
Reviewed-by: Gary Guo <[email protected]> > --- > rust/kernel/sync.rs | 2 + > rust/kernel/sync/srcu.rs | 171 +++++++++++++++++++++++++++++++++++++++ > 2 files changed, 173 insertions(+) > create mode 100644 rust/kernel/sync/srcu.rs
