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 0F868411664; Tue, 16 Jun 2026 08:29:10 +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=1781598552; cv=none; b=rr1PUCqsf0QcwmpC+PiVR3e7Z7CnSW1mOWZYoARKivbD9kNJ7yWogZ8ofC7pCgFF3jxHUjy0yMkNiYQZs8ISAOUd3r127yehUEBD7I2yQqTMhnXnf54JdW+IKuVpRSx2kHsIhGvhYXNP5PM0KK5cITzSZ2CqLvnXYJTAK4FU48E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781598552; c=relaxed/simple; bh=FhAwDT6Njj0GamS5iIl++pF0a3gvu3D47E6F5J/yNZ4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SBhO0kXyzDwSU0GD6gtCf3aqFgcx2+OjARqmPRYy2GaxCgmR+foQbabx3byqauKmFA/jOaSlf4Y4tI8m8h1Y+CT/zWuQRTPWK2o0XsGmT5Ni8vk0BfBUV8AeenrxvZf6jAz6v9y95f+0cMggMq9hBIZ/qdJwEVXyBps/a38repc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CRW6KNvp; 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="CRW6KNvp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5BB1F1F00A3A; Tue, 16 Jun 2026 08:29:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781598550; bh=i2oPOFwXlYMxWoiNDy0bX/9St4UBqgR1RnbnsmsD43E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CRW6KNvpHrKNPKh2vLmXwltKevUdDPtaUAg7zGNGDXTIZGb19h8hnd8x/DC1UufzZ sC+TbxBbZA0WSLRGfFebkDcCndeVct+jsFBjYNMYKqZhZgrbJ47RcWjOn81gaScazs CBC/qw3TQ3sxAQJD8e3B9v0bSAJA4Lss1NA6sjRwr4Eqt6mTsx/hLgv1xLiaHGX8YL zYVGPQ2IV7SydXEco6rc9yF47/67lQDiLxwHXxqCepVo4xOduwd6YBSVnpgw/lDXoV +d+cTd4mjJXJIIXEWFgPq37hD4XQK/S0E/MrGDYIzzj236GrcIl+GmXrL4Ca9+Q0kg GwsRABQdWk3Ww== 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 , Sumit Semwal , =?UTF-8?q?Christian=20K=C3=B6nig?= , Philipp Stanner , "Paul E. McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Daniel Almeida , Greg Kroah-Hartman , Igor Korotin , Lorenzo Stoakes , Alexandre Courbot , FUJITA Tomonori , Krishna Ketan Rai , Shankari Anand , manos@pitsidianak.is, Boris Brezillon Cc: linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, rcu@vger.kernel.org Subject: [PATCH v2 3/6] rust: sync: Add abstraction for synchronize_rcu() Date: Tue, 16 Jun 2026 10:28:15 +0200 Message-ID: <20260616082819.2943886-5-phasta@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616082819.2943886-2-phasta@kernel.org> References: <20260616082819.2943886-2-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 synchronize_rcu() is a frequently used C function which is always safe to be called. Add a safe abstraction for synchronize_rcu(). Signed-off-by: Philipp Stanner --- rust/kernel/sync/rcu.rs | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/rust/kernel/sync/rcu.rs b/rust/kernel/sync/rcu.rs index eef34bf86259..d86d615467b1 100644 --- a/rust/kernel/sync/rcu.rs +++ b/rust/kernel/sync/rcu.rs @@ -56,3 +56,11 @@ pub fn rcu_barrier() { // SAFETY: `rcu_barrier()` is always safe to be called. It just might wait for a grace period. unsafe { bindings::rcu_barrier() }; } + +/// Wait for one RCU grace period. +/// +/// You typically do this to wait for everyone holding a [`Guard`]. +pub fn synchronize_rcu() { + // SAFETY: `synchronize_rcu()` is always safe to be called. It just waits for a grace period. + unsafe { bindings::synchronize_rcu() }; +} -- 2.54.0