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 D25CC3B7B7B; Wed, 24 Jun 2026 15:08:29 +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=1782313710; cv=none; b=QEYUsYkfdApGAZgMp7zHPpQHA+KXtq6Xv4T6Lr3AG+Za0D6vnCRPMupSDOjwSDlBfjMCwW3ezWmJPTmbx03GFHNhYk63x3/ywWUZIkmlAu41ix/etIYVT5Dk5T0i+VDLoVGrD+XfGhcdyXEvgYBMS5K2k0zGgr9csg7rskzwNzs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782313710; c=relaxed/simple; bh=ixVdxvzg6b2oe5t1Ktlqhs3s4ctGCsiiUG/ywZD/2uE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Z3OiIqP1YsgROnDxQpcRnsvK44QTdys+RiYikq+mWymrKixeQDH6Ve9Xk7RSQ5w1QYOKmvqJWdPeO1LwHgMALSre+n6QQ79OgyUf8+U4BItBy9MavuU4gBerUFgBTYCMYJKOoyGfrYuuZAn4y2anwwKSBEOzjO1oyPJG8oldGyg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NCnYnMgw; 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="NCnYnMgw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F2411F00A3A; Wed, 24 Jun 2026 15:08:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782313709; bh=oWpBZhQgcDVYolqCDxpBe+hQAWtESLlt2fqRA3juz7w=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=NCnYnMgwEKsbkKCsK08f/yJRsIMm1TdlKRdnXFv9vqKwo87lZJFmI1YWhF5b19NbM Z2t9lbrq9ifc3wH3kTktb1EajWjY5mBwEoWeOjyBGFL5Jd2a7zizsCL2ccrNd5a/i2 yhxZZeMAqMMmlToTb92YODEvfXXes5tbgsCquy0GCe2Dy3ybDLibWOwERsHxxNVQwy HvgbVYYou3srMwx7ybDZL33O2jBYYnO8lV1gp7aM4q2Qs4s4WiIm3IFcG8ImawDvYE 51BvwYuDg0GAI2nTb4XN/a7go3P2P3wrtG352pwQ0nOKyznltlkwp6fp03BlvRHKJB LZkVwUAIxpU4w== 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 v3 3/3] rust: sync: Use safe synchronize_rcu() abstraction in poll Date: Wed, 24 Jun 2026 17:07:04 +0200 Message-ID: <20260624150704.1504001-5-phasta@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260624150704.1504001-2-phasta@kernel.org> References: <20260624150704.1504001-2-phasta@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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 Reviewed-by: Onur Özkan Reviewed-by: Danilo Krummrich Reviewed-by: Gary Guo --- 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