linux-kernel - [PATCH 1/4] mm: thp: replace folio_memcg() with folio_memcg

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Message-ID: <35038de39456f827c88766b90a1cec93cf151ef2.1758253018.git.zhengqi.arch@bytedance.com>
Date: Fri, 19 Sep 2025 11:46:32 +0800
From: Qi Zheng <zhengqi.arch@...edance.com>
To: hannes@...xchg.org,
	hughd@...gle.com,
	mhocko@...e.com,
	roman.gushchin@...ux.dev,
	shakeel.butt@...ux.dev,
	muchun.song@...ux.dev,
	david@...hat.com,
	lorenzo.stoakes@...cle.com,
	ziy@...dia.com,
	baolin.wang@...ux.alibaba.com,
	Liam.Howlett@...cle.com,
	npache@...hat.com,
	ryan.roberts@....com,
	dev.jain@....com,
	baohua@...nel.org,
	lance.yang@...ux.dev,
	akpm@...ux-foundation.org
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org,
	Muchun Song <songmuchun@...edance.com>,
	Qi Zheng <zhengqi.arch@...edance.com>
Subject: [PATCH 1/4] mm: thp: replace folio_memcg() with folio_memcg_charged()

From: Muchun Song <songmuchun@...edance.com>

folio_memcg_charged() is intended for use when the user is unconcerned
about the returned memcg pointer. It is more efficient than folio_memcg().
Therefore, replace folio_memcg() with folio_memcg_charged().

Signed-off-by: Muchun Song <songmuchun@...edance.com>
Acked-by: Johannes Weiner <hannes@...xchg.org>
Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
---
 mm/huge_memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 5acca24bbabbe..582628ddf3f33 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -4014,7 +4014,7 @@ bool __folio_unqueue_deferred_split(struct folio *folio)
 	bool unqueued = false;
 
 	WARN_ON_ONCE(folio_ref_count(folio));
-	WARN_ON_ONCE(!mem_cgroup_disabled() && !folio_memcg(folio));
+	WARN_ON_ONCE(!mem_cgroup_disabled() && !folio_memcg_charged(folio));
 
 	ds_queue = get_deferred_split_queue(folio);
 	spin_lock_irqsave(&ds_queue->split_queue_lock, flags);
-- 
2.20.1