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.

[david@redhat.com: Changelog refinements]

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Link: http://lkml.kernel.org/r/20200818084448.33969-1-richard.weiyang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/page_reporting.c b/mm/page_reporting.c
index 3bbd471..aaaa360 100644 (file)
--- a/mm/page_reporting.c
+++ b/mm/page_reporting.c
@@ -178,7 +178,7 @@ page_reporting_cycle(struct page_reporting_dev_info *prdev, struct zone *zone,
                 * 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 */