From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta1.migadu.com (out-64.mta1.migadu.com [95.215.58.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8318746A5EE for ; Mon, 21 Sep 2026 09:22:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789982580; cv=none; b=tdQR5IqcPpg5mQH40afk795MrGF1MjmulgEI+kG4k3rkL8fn8GgucyjngPl7QoOKbpTkPV8KNfjzmoGWlRn+cKvyZdld5TWkl9LkoKihBClienYZjbnSNpXs1qOuzlwOpq1QNmavM/47yNK7XsVTrUMrSpd1LpNIudwIjz0w4d8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789982580; c=relaxed/simple; bh=+apiCWXB2L/Ctun6eWEUkwbOkaFG907R5s++lFpj7MQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=OSp+Za7jkhCjK20OSodU/6Tnf2ydGNabNyA2WcdQxv4FBBzmyH5tbgDNaZx2lLGWtsR2weXc1+IIc8/E0R9HDR2jPAhPIKTJzTmDZWjMpzcvh/HE+dvJcmQhJ/WP2ytYhCZM663gMjLdZYVG+dH+2jfXiNIUUGOVwU8QhAFIKp0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=WTUC2a2V; arc=none smtp.client-ip=95.215.58.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="WTUC2a2V" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=+apiCWXB2L/Ctun6eWEUkwbOkaFG907R5s++lFpj7MQ=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1789982576; v=1; x=1790587376; b=WTUC2a2VzrlQ2BMfoVUjs85qxry4/YDC6KfWMIl/amxO7xxZPqyBhOw1LIUWCxQeW2PK43I5 RzpLMOhMh37dI09MpeG65XP2bED7/NdLdCVzWVbz0zc/qiZR41Gk6mFPIsk00QMbzrxrtj2wxAk +G6rWuh6+lNFCSeR9dF3xtmg= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 0629d28ba88758c8; Mon, 21 Sep 2026 09:22:56 +0000 X-Mizu-Trace-ID: 0629d28ba88758c8 X-Migadu-Flow: FLOW_OUT From: Ye Liu To: "Rafael J. Wysocki" Cc: Ye Liu , Michal Hocko , SJ Park , Lorenzo Stoakes , Oleg Nesterov , akpm@linux-foundation.org, peterz@infradead.org, paulmck@kernel.org, mingo@redhat.com, rostedt@goodmis.org, jpoimboe@kernel.org, mic@digikod.net, tglx@kernel.org, david@kernel.org, linmiaohe@huawei.com, nao.horiguchi@gmail.com, gnoack3000@gmail.com, gourry@gourry.net, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, rcu@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-security-module@vger.kernel.org, rientjes@google.com, shakeel.butt@linux.dev, xu.xin16@zte.com.cn, chengming.zhou@linux.dev, will@kernel.org, boqun@kernel.org, frederic@kernel.org, neeraj.upadhyay@kernel.org, joelagnelf@nvidia.com, josh@joshtriplett.org, urezki@gmail.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, tony.luck@intel.com, reinette.chatre@intel.com, x86@kernel.org, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, pavel@kernel.org, lance.yang@linux.dev, mhiramat@kernel.org, pmladek@suse.com, longman@redhat.com, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, qiang.zhang@linux.dev, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, kprateek.nayak@amd.com, mark.rutland@arm.com, Dave.Martin@arm.com, james.morse@arm.com, babu.moger@amd.com Subject: [PATCH v4 06/15] freezer: convert thread iterator to for_each_thread_rculock Date: Mon, 21 Sep 2026 17:20:52 +0800 Message-Id: <20260921092101.89285-7-ye.liu@linux.dev> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260921092101.89285-1-ye.liu@linux.dev> References: <20260921092101.89285-1-ye.liu@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Ye Liu Replace the manual rcu_read_lock()/rcu_read_unlock() pair combined with for_each_thread() loop in kernel/freezer.c with for_each_thread_rculock(), which scopes the RCU read lock to the loop body via scoped_guard(rcu). No functional change. Signed-off-by: Ye Liu Acked-by: Michal Hocko Reviewed-by: SJ Park Reviewed-by: Lorenzo Stoakes (ARM) Reviewed-by: Oleg Nesterov --- kernel/freezer.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/kernel/freezer.c b/kernel/freezer.c index a76bf957fb32..7a870f71dcf6 100644 --- a/kernel/freezer.c +++ b/kernel/freezer.c @@ -217,11 +217,9 @@ void thaw_process(struct task_struct *p) { struct task_struct *t; - rcu_read_lock(); - for_each_thread(p, t) { + for_each_thread_rculock(p, t) { __thaw_task(t); } - rcu_read_unlock(); } /** -- 2.25.1