From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta1.migadu.com (out-54.mta1.migadu.com [95.215.58.54]) (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 6F23243D4E0 for ; Mon, 7 Sep 2026 08:15:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788768946; cv=none; b=LymXTb/NXO/mFjGzI56KZJzxMjHSoef8EnIWSD1N41oDl4p/yEvbN92xAPUXPVtUJCUpvP3Qt3kpqFKsJoNHc8x/zT6qBvVanWKs1RNEYbs25jvl8UqGU3/LQHXRtFBH28KZFcElz7YY6mMMUIbwA9xJe87g2RvqH9WlAbLl6rI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788768946; c=relaxed/simple; bh=QPbA87RHE+w44sKh8YFv32hrfoolvz7WuKZeL9giD2c=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=KFUhLc3YaOn57yMVfk59d7iaVzXFu+iYoOpMt1FliB+z6KDwACdUlXOwbuCA5ALkwJudxRTlxZrPGWkQaJ6nFxs/i8oThsSWhEc9qfbSHykWFcCEGGcr03o/pNgvEaHFC3e6CSGZAzKOxwiaFF2HERLtTJiBSP1HTg79APKqC3Y= 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=Mr/dbA1s; arc=none smtp.client-ip=95.215.58.54 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="Mr/dbA1s" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=QPbA87RHE+w44sKh8YFv32hrfoolvz7WuKZeL9giD2c=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1788768942; v=1; x=1789373742; b=Mr/dbA1ssVgGNGSkx9NfcW/TeNr3X7ajPN5WChcRkivApREW2EP1xWiVFInVPhm1sPWsjB3w SxfFgpedO4Vr5GcEhpleqAbVMPYg4DPql6i5nm/5ONajnHrM7ZQZwILXWB5BliGboSUnHA1OFdC Jb0/0QoO2QZhUW+sgHTDxF68= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 6d517d0bf0f3bdbe; Mon, 07 Sep 2026 08:15:41 +0000 X-Mizu-Trace-ID: 6d517d0bf0f3bdbe X-Migadu-Flow: FLOW_OUT From: Ye Liu To: =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= , Paul Moore , James Morris , "Serge E. Hallyn" Cc: Ye Liu , Justin Suess , =?UTF-8?q?G=C3=BCnther=20Noack?= , mhocko@suse.com, peterz@infradead.org, paulmck@kernel.org, mingo@redhat.com, rostedt@goodmis.org, jpoimboe@kernel.org, oleg@redhat.com, tglx@kernel.org, akpm@linux-foundation.org, david@kernel.org, linmiaohe@huawei.com, nao.horiguchi@gmail.com, rafael@kernel.org, ljs@kernel.org, sj@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, 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, 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 Subject: [PATCH v2 8/8] security/landlock: convert thread iterator to for_each_thread_rculock Date: Mon, 7 Sep 2026 16:13:34 +0800 Message-Id: <20260907081334.1152889-9-ye.liu@linux.dev> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260907081334.1152889-1-ye.liu@linux.dev> References: <20260907081334.1152889-1-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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ye Liu Replace guard(rcu)() + for_each_thread() 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 Reviewed-by: Justin Suess Reviewed-by: Günther Noack --- Changes in v2: - Rename *_rcu to *_rculock security/landlock/tsync.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/security/landlock/tsync.c b/security/landlock/tsync.c index 0b71e158c3f5..a578af640aad 100644 --- a/security/landlock/tsync.c +++ b/security/landlock/tsync.c @@ -335,9 +335,7 @@ static size_t count_additional_threads(const struct tsync_works *works) caller = current; - guard(rcu)(); - - for_each_thread(caller, thread) { + for_each_thread_rculock(caller, thread) { /* Skip current, since it is initiating the sync. */ if (thread == caller) continue; @@ -376,9 +374,7 @@ static bool schedule_task_work(struct tsync_works *works, caller = current; - guard(rcu)(); - - for_each_thread(caller, thread) { + for_each_thread_rculock(caller, thread) { /* Skip current, since it is initiating the sync. */ if (thread == caller) continue; -- 2.25.1