linux-kernel - [PATCH] mm: vmstat: correct the comment above preempt_disable

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Message-ID: <20251110084437.46701-1-qi.zheng@linux.dev>
Date: Mon, 10 Nov 2025 16:44:37 +0800
From: Qi Zheng <qi.zheng@...ux.dev>
To: akpm@...ux-foundation.org,
	david@...nel.org,
	lorenzo.stoakes@...cle.com,
	Liam.Howlett@...cle.com,
	vbabka@...e.cz,
	rppt@...nel.org,
	surenb@...gle.com,
	mhocko@...e.com,
	harry.yoo@...cle.com
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Qi Zheng <zhengqi.arch@...edance.com>
Subject: [PATCH] mm: vmstat: correct the comment above preempt_disable_nested()

From: Qi Zheng <zhengqi.arch@...edance.com>

The comment explaining why these parts use preempt_disable_nested() is in
__mod_zone_page_state(), not in __mod_node_page_state(), so we should see
__mod_zone_page_state(). Just correct it.

Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
---
 mm/vmstat.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/mm/vmstat.c b/mm/vmstat.c
index b53b07aa29e81..65de88cdf40e6 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -392,7 +392,7 @@ void __mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item,
 		delta >>= PAGE_SHIFT;
 	}
 
-	/* See __mod_node_page_state */
+	/* See __mod_zone_page_state() */
 	preempt_disable_nested();
 
 	x = delta + __this_cpu_read(*p);
@@ -438,7 +438,7 @@ void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
 	s8 __percpu *p = pcp->vm_stat_diff + item;
 	s8 v, t;
 
-	/* See __mod_node_page_state */
+	/* See __mod_zone_page_state() */
 	preempt_disable_nested();
 
 	v = __this_cpu_inc_return(*p);
@@ -461,7 +461,7 @@ void __inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
 
 	VM_WARN_ON_ONCE(vmstat_item_in_bytes(item));
 
-	/* See __mod_node_page_state */
+	/* See __mod_zone_page_state() */
 	preempt_disable_nested();
 
 	v = __this_cpu_inc_return(*p);
@@ -494,7 +494,7 @@ void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
 	s8 __percpu *p = pcp->vm_stat_diff + item;
 	s8 v, t;
 
-	/* See __mod_node_page_state */
+	/* See __mod_zone_page_state() */
 	preempt_disable_nested();
 
 	v = __this_cpu_dec_return(*p);
@@ -517,7 +517,7 @@ void __dec_node_state(struct pglist_data *pgdat, enum node_stat_item item)
 
 	VM_WARN_ON_ONCE(vmstat_item_in_bytes(item));
 
-	/* See __mod_node_page_state */
+	/* See __mod_zone_page_state() */
 	preempt_disable_nested();
 
 	v = __this_cpu_dec_return(*p);
-- 
2.20.1