[086/156] mm/page_reporting.c: drop stale list head check in page_reporting_cycle

Commit Message

Andrew Morton Oct. 16, 2020, 2:46 a.m. UTC

From: Wei Yang <[e-mail]>
Subject: mm/page_reporting.c: drop stale list head check in page_reporting_cycle

list_for_each_entry_safe() guarantees that we will never stumble over the
list head; "&page->lru != list" will always evaluate to true.  Let's
simplify.

[[e-mail]: Changelog refinements]
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Wei Yang <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Reviewed-by: Alexander Duyck <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/page_reporting.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

--- a/mm/page_reporting.c~mm-page_reporting-drop-stale-list-head-check-in-page_reporting_cycle
+++ a/mm/page_reporting.c
@@ -178,7 +178,7 @@  page_reporting_cycle(struct page_reporti
 		 * the new head of the free list before we release the
 		 * zone lock.
 		 */
-		if (&page->lru != list && !list_is_first(&page->lru, list))
+		if (!list_is_first(&page->lru, list))
 			list_rotate_to_front(&page->lru, list);
 
 		/* release lock before waiting on report processing */