linux-kernel - [PATCH] mm/page_alloc: Remove redundant pcp->free_count initialization in per_cpu_pages

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Message-ID: <20250814071828.12036-1-ye.liu@linux.dev>
Date: Thu, 14 Aug 2025 15:18:28 +0800
From: Ye Liu <ye.liu@...ux.dev>
To: Andrew Morton <akpm@...ux-foundation.org>,
	Vlastimil Babka <vbabka@...e.cz>
Cc: Ye Liu <liuye@...inos.cn>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Michal Hocko <mhocko@...e.com>,
	Brendan Jackman <jackmanb@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Zi Yan <ziy@...dia.com>,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mm/page_alloc: Remove redundant pcp->free_count initialization in per_cpu_pages_init()

From: Ye Liu <liuye@...inos.cn>

In per_cpu_pages_init(), pcp->free_count is explicitly initialized to 0,
but this is redundant because the entire struct is already zeroed by
memset(pcp, 0, sizeof(*pcp)).

Signed-off-by: Ye Liu <liuye@...inos.cn>
---
 mm/page_alloc.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d1d037f97c5f..64872214bc7d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5946,7 +5946,6 @@ static void per_cpu_pages_init(struct per_cpu_pages *pcp, struct per_cpu_zonesta
 	pcp->high_min = BOOT_PAGESET_HIGH;
 	pcp->high_max = BOOT_PAGESET_HIGH;
 	pcp->batch = BOOT_PAGESET_BATCH;
-	pcp->free_count = 0;
 }
 
 static void __zone_set_pageset_high_and_batch(struct zone *zone, unsigned long high_min,
-- 
2.43.0