From 6be12ddb52f9a3fa62f078a0b61573416de5ff5c Mon Sep 17 00:00:00 2001
From: Wang Wensheng <wsw9603@163.com>
Date: Sun, 26 Jul 2026 21:35:01 +0800
Subject: [PATCH] ksm: stop iterating VMAs when ksm_test_exit returns true

In scan_get_next_rmap_item() the break statement only exits the inner
while loop, leaving remaining VMAs to be iterated even if ksm_test_exit()
returns true.  Replace it with a goto statement to avoid the unnecessary
work.

Link: https://lore.kernel.org/20260726133501.504048-1-wsw9603@163.com
Signed-off-by: Wang Wensheng <wsw9603@163.com>
Reviewed-by: Xu Xin <xu.xin16@zte.com.cn>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/ksm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/ksm.c b/mm/ksm.c
index 47006f494fcb..b4142746777e 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -2700,7 +2700,7 @@ static struct ksm_rmap_item *scan_get_next_rmap_item(struct page **page)
 			struct folio *folio;
 
 			if (ksm_test_exit(mm))
-				break;
+				goto no_vmas;
 
 			int found;