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Fri, 5 Jun 2026 09:35:46 -0400 (EDT) From: Boqun Feng To: linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, rcu@vger.kernel.org Cc: Miguel Ojeda , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , "Liam R. Howlett" , Andrew Ballance , "Paul E. McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Sumit Semwal , =?UTF-8?q?Christian=20K=C3=B6nig?= , maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, Philipp Stanner , Lyude Paul , Daniel Almeida , =?UTF-8?q?Onur=20=C3=96zkan?= Subject: [PATCH 0/3] rust: sync: Introduce Rcu*Box Date: Fri, 5 Jun 2026 06:35:36 -0700 Message-ID: <20260605133541.22569-1-boqun@kernel.org> X-Mailer: git-send-email 2.51.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 2FAD5120008 X-Stat-Signature: i4y7ruxi7aywookqkasgft1sdpe45hk6 X-Rspamd-Server: rspam03 X-Rspam-User: X-HE-Tag: 1780666550-427108 X-HE-Meta: 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 gT39UkQL VF2/g4/Kb47o7SCL00fn2YLPSBbmdCxNgpb90MFayqeLIIANxC6zD0jc8jJqmW0bNLxPwPGE8nD8Xh0vnNr10jkWD+popH3XzNOK9HpLt8dq2USKCYNDdanJvVQ+0Fe/yDZ9K66ZUdEA4Y/TQgSa4ZXS1fhV4aSyokEVyfHwX12BkXJ3CRZ9ManMwf+Ypd9US/NpTuUejD6CW1b9YXaK0FcuWDMhnzioG5WBhKrOnAtSZyqRKGZ1MGl8GrNjP2XdcX0C/YTWCMLQZGnWOLt/9CVLv0w== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: (this series is based on Alice's RFC [1] and discussion around Philipp's patches [2], [3]) As an easy way to provide RCU-protected allocation, two major types are provided: - `RcuBox`, inner T will be dropped and after a grace period. Users: binder with maple_tree and dma_fence. - `RcuFreeBox`, inner T will be cleaned up immmediately and freed after a grace period. (Name suggestion is welcome). This is an attempt to consolidate Alice's `PollCondVarBox` [4] into a generic implementation, InPlaceInit support is still missing, but I want to get some feedback on the trait `RcuFreeSafe`. [1]: https://lore.kernel.org/rust-for-linux/20260116-rcu-box-v1-0-38ebfbcd53f0@google.com/ [2]: https://lore.kernel.org/rust-for-linux/20260530143541.229628-2-phasta@kernel.org/ [3]: https://lore.kernel.org/rust-for-linux/20260520131725.266014-2-phasta@kernel.org/ [4]: https://lore.kernel.org/rust-for-linux/20260523-upgrade-poll-v4-0-f5b4c747eac2@google.com/ Regards, Boqun Alice Ryhl (2): rust: rcu: Add RcuBox type rust: maple_tree: Add load_rcu() Boqun Feng (1): rust: rcu: Introduce RcuFreeBox rust/bindings/bindings_helper.h | 1 + rust/kernel/maple_tree.rs | 52 ++++++ rust/kernel/sync/rcu.rs | 65 ++++++- rust/kernel/sync/rcu/rcu_box.rs | 290 ++++++++++++++++++++++++++++++++ 4 files changed, 407 insertions(+), 1 deletion(-) create mode 100644 rust/kernel/sync/rcu/rcu_box.rs -- 2.51.0