From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A20D31A680E; Mon, 22 Jun 2026 17:33:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782149611; cv=none; b=sik7YMWMalSabxuLxnsvJKA1xwxUXIwgiAPK/8TnYcyZt3cWMj9RwTj1ZOlWN/+UxL/lngxbxwEToBwKKDqpCynBbZZ4LT1HBkfPsMqwD3vJMH9WoNLvFxDdPSOHGCL/bKwWXyF69D2QNHNT0UCmQTXSJ/VNWBWAkB9BsaRFjgs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782149611; c=relaxed/simple; bh=uKSc6qrx7IuatnJmOjo8996xDEFbNY5Q9ErD7q8awVQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=H+tjepOJ6rDWpK3+shh0AgqDlOV2e6w15tiX2KLHN6aocp2XCZEGb4cEYZoPqonNHfCgkGqRTwbc0fTK7mlUgMYmrXoJGV/V23koMGB2OYoaInXd9INBcLY8s5OqpNvtzA31/5VZrPn5Sw8m1D4eA023ZlsusDgOgEr34N7uOOM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PkC4Lqn4; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PkC4Lqn4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27AAC1F00A3A; Mon, 22 Jun 2026 17:33:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782149610; bh=m49MKTSc1P/p1L29za4J/TD61X+wV5tL/oQX4CgdDdI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PkC4Lqn4fR8S/mq4IYUohNFpBYX23pLJ5UZF7j+rD8AU1i08fJFSv9sNso03Krz98 RCM8Js22sqhi6VyinI8zIKQNEvBjKy1vjiQ8OUStcdrN8NLGzpSDH0FN79nGFXVBT4 Ud2YVi6aOsPG7Pn66MkFFW1IxHl6ETOMUiF88QjgKQxLCMHSbElxUtxFsSL/RhVltC fY4xmitmN9pRFkyUuO9Q/tc3adusCwiJ0I6ThLsY6P8nx0JhOTHv07tYq5sf58yq+g KqI/GFtyizw5/lwqLhGSB/zNf5Jv31ygLC89H+VGB3VSrcQ6snZVBijpB1/repoz7R 9K0Yc2SNV4DEw== From: Philipp Stanner To: Miguel Ojeda , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , =?UTF-8?q?Onur=20=C3=96zkan?= , Alexander Viro , Christian Brauner , Jan Kara , Lyude Paul , "Paul E. McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Christian Schrefl , Philipp Stanner Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, rcu@vger.kernel.org Subject: [PATCH v2 3/3] rust: sync: Use safe synchronize_rcu() abstraction in poll Date: Mon, 22 Jun 2026 19:32:51 +0200 Message-ID: <20260622173250.411377-5-phasta@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260622173250.411377-2-phasta@kernel.org> References: <20260622173250.411377-2-phasta@kernel.org> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit We now have a safe wrapper for the foreign function synchronize_rcu(). Use it in poll.rs. Signed-off-by: Philipp Stanner Reviewed-by: Alice Ryhl --- rust/kernel/sync/poll.rs | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/rust/kernel/sync/poll.rs b/rust/kernel/sync/poll.rs index 0ec985d560c8..30ebeea1702f 100644 --- a/rust/kernel/sync/poll.rs +++ b/rust/kernel/sync/poll.rs @@ -8,7 +8,11 @@ bindings, fs::File, prelude::*, - sync::{CondVar, LockClassKey}, + sync::{ + CondVar, + LockClassKey, + rcu::synchronize_rcu, // + }, // }; use core::{marker::PhantomData, ops::Deref}; @@ -99,8 +103,6 @@ fn drop(self: Pin<&mut Self>) { unsafe { bindings::__wake_up_pollfree(self.inner.wait_queue_head.get()) }; // Wait for epoll items to be properly removed. - // - // SAFETY: Just an FFI call. - unsafe { bindings::synchronize_rcu() }; + synchronize_rcu(); } } -- 2.54.0