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Hallyn" Cc: Ye Liu , Justin Suess , =?UTF-8?q?G=C3=BCnther=20Noack?= , Gregory Price , SJ Park , Lorenzo Stoakes , 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, 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 v3 15/15] security/landlock: convert thread iterator to for_each_thread_rculock Date: Fri, 11 Sep 2026 15:58:00 +0800 Message-Id: <20260911075800.491472-16-ye.liu@linux.dev> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260911075800.491472-1-ye.liu@linux.dev> References: <20260911075800.491472-1-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: 96A4E160003 X-Stat-Signature: ms1qsgwzds81kpoc3dejktjc381p5n8j X-Rspam-User: X-HE-Tag: 1789113764-775469 X-HE-Meta: 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 5o+qwhmv 66xlLvwniMCL4EcpBmryHgv0sJuzAp56IKRDeqj0UAAY9CQ5v1aWTARm75Mtiq8JpwU7OvqYwp/hQXRZ2LM5dWj/WWMH28BVtbhthqwU2WQ5hTUreOTST/+3vJR0CaTe9oCIPh8rI2WzH7WlO5R/U6WVlzDp+Ipl5DjzmIqPl45IfWGHvG1GV+tnG2QbsWf/6d1ZC6xuHbbLQl2moiDNeWq/eozywvbMXOn1L8fjGJ3/SfrZz4pqNkReT/ob6COqRfjFy0AF+9UvJgmpCK9OmITMZURbB2oPBgxbNN/gUMkmxVulJ3yxgEE8pFtCGszN4xrrlh2aKDp39RN2e0GULj1O0MGeaenyC0/gHD7u4epfNOQoWlGiubtPenPneS8gjyf0b5rcPiDmdWqruE8DZvl+Q+9pd6PABV6J1n6ujPahSIStS/j8Z8pnogtk9RPE3NfVx9PR/98B5PCsKYM+Ggt4CNrETll8LwjKxDEbWh77q5s4= 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 Reviewed-by: Gregory Price (Meta) Reviewed-by: SJ Park Reviewed-by: Lorenzo Stoakes (ARM) --- 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