[PATCH v3 3/8] mm: migrate: convert numamigrate_isolate_page() to numamigrate_isolate_folio()

[Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>]

Rename numamigrate_isolate_page() to numamigrate_isolate_folio(), then
make it takes a folio and use folio API to save compound_head() calls.

Reviewed-by: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
---
 mm/migrate.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index f2d86dfd8423..281eafdf8e63 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2478,10 +2478,9 @@ static struct folio *alloc_misplaced_dst_folio(struct folio *src,
 	return __folio_alloc_node(gfp, order, nid);
 }
 
-static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
+static int numamigrate_isolate_folio(pg_data_t *pgdat, struct folio *folio)
 {
-	int nr_pages = thp_nr_pages(page);
-	int order = compound_order(page);
+	int nr_pages = folio_nr_pages(folio);
 
 	/* Avoid migrating to a node that is nearly full */
 	if (!migrate_balanced_pgdat(pgdat, nr_pages)) {
@@ -2493,22 +2492,23 @@ static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
 			if (managed_zone(pgdat->node_zones + z))
 				break;
 		}
-		wakeup_kswapd(pgdat->node_zones + z, 0, order, ZONE_MOVABLE);
+		wakeup_kswapd(pgdat->node_zones + z, 0,
+			      folio_order(folio), ZONE_MOVABLE);
 		return 0;
 	}
 
-	if (!isolate_lru_page(page))
+	if (!folio_isolate_lru(folio))
 		return 0;
 
-	mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON + page_is_file_lru(page),
+	node_stat_mod_folio(folio, NR_ISOLATED_ANON + folio_is_file_lru(folio),
 			    nr_pages);
 
 	/*
-	 * Isolating the page has taken another reference, so the
-	 * caller's reference can be safely dropped without the page
+	 * Isolating the folio has taken another reference, so the
+	 * caller's reference can be safely dropped without the folio
 	 * disappearing underneath us during migration.
 	 */
-	put_page(page);
+	folio_put(folio);
 	return 1;
 }
 
@@ -2542,7 +2542,7 @@ int migrate_misplaced_page(struct page *page, struct vm_area_struct *vma,
 	if (page_is_file_lru(page) && PageDirty(page))
 		goto out;
 
-	isolated = numamigrate_isolate_page(pgdat, page);
+	isolated = numamigrate_isolate_folio(pgdat, page_folio(page));
 	if (!isolated)
 		goto out;
 
-- 
2.27.0