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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> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: E50D5140008 X-Stat-Signature: sxwbep78zogg3iuoiegrosi6wq86oosb X-Rspam-User: X-HE-Tag: 1788768943-332070 X-HE-Meta: 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 DoBjDXOd +QFRok8Y8v7khrwjF0xEhptxvl5C5dTMwIUpUwKBgYku5Jdjf0miPpLpoNca4xeGodPRinZrAHyG1eeSDH03P6+dE4RJ32ZnZ9WMsRhspx3duCzWxwEi6o844EMDA8nyTCFeVHD2V6NKukwLFfd+DBRJUDRIZm9q6+y/2jEwjYoEb5I0EkbnHyPBl355Q3bde9yuzy/SNH6BstFxFS1TIj26/qWx6w5anq9virBRlyHjRz9gVyPJj1ciB2eiQhFD2D/bZ87r0Kwp5Lf/siFOSFNpbRCH4QWeMF5ZKEN0bfY/86jbuHrUKt6h3lFjilS8smdALtbNwwUAAutkbseSMUryfF34bv2KjqvtLG2XIJYwNzzUaBYBQvwGC25xFvop+sDpK7wcALgD29mDznOYNm1dtB5LYHXUt6pMQj2wTASMqwvkQpFtJpN6ro1mhY9SAanZK Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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