linux-kernel - [PATCH 1/4] mm, memcontrol: avoid duplicated memcg enable check

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Message-ID: <20241202184154.19321-2-ryncsn@gmail.com>
Date: Tue,  3 Dec 2024 02:41:51 +0800
From: Kairui Song <ryncsn@...il.com>
To: linux-mm@...ck.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Chris Li <chrisl@...nel.org>,
	Hugh Dickins <hughd@...gle.com>,
	"Huang, Ying" <ying.huang@...el.com>,
	Yosry Ahmed <yosryahmed@...gle.com>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Johannes Weiner <hannes@...xchg.org>,
	Barry Song <baohua@...nel.org>,
	Michal Hocko <mhocko@...nel.org>,
	linux-kernel@...r.kernel.org,
	Kairui Song <kasong@...cent.com>
Subject: [PATCH 1/4] mm, memcontrol: avoid duplicated memcg enable check

From: Kairui Song <kasong@...cent.com>

mem_cgroup_uncharge_swap() implies a mem_cgroup_disabled() check,
which is already checked by the caller here. Skip it by calling
__mem_cgroup_uncharge_swap() directly.

Signed-off-by: Kairui Song <kasong@...cent.com>
---
 mm/memcontrol.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 7b3503d12aaf..d3d1eb506eee 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4615,7 +4615,7 @@ void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry, unsigned int nr_pages)
 		 * let's not wait for it.  The page already received a
 		 * memory+swap charge, drop the swap entry duplicate.
 		 */
-		mem_cgroup_uncharge_swap(entry, nr_pages);
+		__mem_cgroup_uncharge_swap(entry, nr_pages);
 	}
 }
 
-- 
2.47.0