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Date:   Mon,  7 Dec 2020 15:09:39 -0700
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Subject: [PATCH 01/11] mm: use add_page_to_lru_list()
From:   Yu Zhao <yuzhao@google.com>
To:     Andrew Morton <akpm@linux-foundation.org>,
        Hugh Dickins <hughd@google.com>,
        Alex Shi <alex.shi@linux.alibaba.com>
Cc:     Michal Hocko <mhocko@kernel.org>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Vladimir Davydov <vdavydov.dev@gmail.com>,
        Roman Gushchin <guro@fb.com>, Vlastimil Babka <vbabka@suse.cz>,
        Matthew Wilcox <willy@infradead.org>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, Yu Zhao <yuzhao@google.com>
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There is add_page_to_lru_list(), and move_pages_to_lru() should reuse
it, not duplicate it.

Signed-off-by: Yu Zhao <yuzhao@google.com>
---
 mm/vmscan.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 469016222cdb..a174594e40f8 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1821,7 +1821,6 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec,
 	int nr_pages, nr_moved = 0;
 	LIST_HEAD(pages_to_free);
 	struct page *page;
-	enum lru_list lru;
 
 	while (!list_empty(list)) {
 		page = lru_to_page(list);
@@ -1866,11 +1865,8 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec,
 		 * inhibits memcg migration).
 		 */
 		VM_BUG_ON_PAGE(!lruvec_holds_page_lru_lock(page, lruvec), page);
-		lru = page_lru(page);
+		add_page_to_lru_list(page, lruvec, page_lru(page));
 		nr_pages = thp_nr_pages(page);
-
-		update_lru_size(lruvec, lru, page_zonenum(page), nr_pages);
-		list_add(&page->lru, &lruvec->lists[lru]);
 		nr_moved += nr_pages;
 		if (PageActive(page))
 			workingset_age_nonresident(lruvec, nr_pages);
-- 
2.29.2.576.ga3fc446d84-goog