mm: convert isolate_page() to mf_isolate_folio()

The only caller now has a folio, so pass it in and operate on it.  Saves
many page->folio conversions and introduces only one folio->page
conversion when calling isolate_movable_page().

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: Matthew Wilcox (Oracle)

mm/memory-failure.c

@@ -2602,37 +2602,37 @@ int unpoison_memory(unsigned long pfn)
 }
 EXPORT_SYMBOL(unpoison_memory);
 
-static bool isolate_page(struct page *page, struct list_head *pagelist)
+static bool mf_isolate_folio(struct folio *folio, struct list_head *pagelist)
 {
 	bool isolated = false;
 
-	if (PageHuge(page)) {
-		isolated = isolate_hugetlb(page_folio(page), pagelist);
+	if (folio_test_hugetlb(folio)) {
+		isolated = isolate_hugetlb(folio, pagelist);
 	} else {
-		bool lru = !__PageMovable(page);
+		bool lru = !__folio_test_movable(folio);
 
 		if (lru)
-			isolated = isolate_lru_page(page);
+			isolated = folio_isolate_lru(folio);
 		else
-			isolated = isolate_movable_page(page,
+			isolated = isolate_movable_page(&folio->page,
 							ISOLATE_UNEVICTABLE);
 
 		if (isolated) {
-			list_add(&page->lru, pagelist);
+			list_add(&folio->lru, pagelist);
 			if (lru)
-				inc_node_page_state(page, NR_ISOLATED_ANON +
-						    page_is_file_lru(page));
+				node_stat_add_folio(folio, NR_ISOLATED_ANON +
+						    folio_is_file_lru(folio));
 		}
 	}
 
 	/*
-	 * If we succeed to isolate the page, we grabbed another refcount on
-	 * the page, so we can safely drop the one we got from get_any_page().
-	 * If we failed to isolate the page, it means that we cannot go further
+	 * If we succeed to isolate the folio, we grabbed another refcount on
+	 * the folio, so we can safely drop the one we got from get_any_page().
+	 * If we failed to isolate the folio, it means that we cannot go further
 	 * and we will return an error, so drop the reference we got from
 	 * get_any_page() as well.
 	 */
-	put_page(page);
+	folio_put(folio);
 	return isolated;
 }
 
@@ -2686,7 +2686,7 @@ static int soft_offline_in_use_page(struct page *page)
 		return 0;
 	}
 
-	if (isolate_page(&folio->page, &pagelist)) {
+	if (mf_isolate_folio(folio, &pagelist)) {
 		ret = migrate_pages(&pagelist, alloc_migration_target, NULL,
 			(unsigned long)&mtc, MIGRATE_SYNC, MR_MEMORY_FAILURE, NULL);
 		if (!ret) {