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Tue, 3 Mar 2026 10:26:06 +0000 (GMT) From: Maninder Singh To: mhocko@suse.com, rientjes@google.com, shakeel.butt@linux.dev, akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Maninder Singh Subject: [PATCH 1/1] mm/oom_kill.c: simpilfy rcu call with guard(rcu) Date: Tue, 3 Mar 2026 15:56:00 +0530 Message-Id: <20260303102600.105255-1-maninder1.s@samsung.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CMS-MailID: 20260303102608epcas5p159cd0ad7dfd939c4a67fab3c7ecd7bfd X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P X-CMS-RootMailID: 20260303102608epcas5p159cd0ad7dfd939c4a67fab3c7ecd7bfd References: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: C78EA40006 X-Stat-Signature: gp16e8d74qwnbowo4s5cgr947dajjcek X-Rspam-User: X-HE-Tag: 1772533572-210227 X-HE-Meta: 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 ERD1fXAz +KKFnuCXexIdFxN/kcmSly7D/YlAvcBSO1x0C+MVxxnzBTVgjvYaq6zbNDla+n9+EndV980Ly0IANw2RsWR2uOGsrIM5YDkcM2C7pXjgF2hI+MAePxmrYnJ0apRxKSCawumv57eSXNIRoTezraMJyNKIpZuIF/z5B0iPYpNrLSCw2TKI= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: guard(rcu)() simplifies code readability and there is no need of extra goto labels. Thus replacing rcu_read_lock/unlock with guard(rcu)(). Signed-off-by: Maninder Singh --- mm/oom_kill.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 5c6c95c169ee..9e3e88c06ead 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -135,19 +135,16 @@ struct task_struct *find_lock_task_mm(struct task_struct *p) { struct task_struct *t; - rcu_read_lock(); + guard(rcu)(); for_each_thread(p, t) { task_lock(t); if (likely(t->mm)) - goto found; + return t; task_unlock(t); } - t = NULL; -found: - rcu_read_unlock(); - return t; + return NULL; } /* -- 2.34.1