94 	 * As movable pages are not isolated from LRU lists, concurrent  in isolate_movable_page()
98 	 * In order to avoid having an already isolated movable page  in isolate_movable_page()
99 	 * being (wrongly) re-isolated while it is under migration,  in isolate_movable_page()
140  * Put previously isolated pages back onto the appropriate lists
143  * This function shall be used whenever the isolated pageset has been
159 		 * We isolated non-lru movable folio so here we can use  in putback_movable_pages()
1297 	 * isolated from the unevictable LRU: but this case is the easiest.  in migrate_folio_move()
2062  *     errno - if the page cannot be found/isolated
2074 	bool isolated;  in add_page_for_migration()  local
2108 			isolated = isolate_hugetlb(page_folio(page), pagelist);  in add_page_for_migration()
2109 			err = isolated ? 1 : -EBUSY;  in add_page_for_migration()
2115 		isolated = isolate_lru_page(head);  in add_page_for_migration()
2116 		if (!isolated) {  in add_page_for_migration()
2131 	 * not isolated.  in add_page_for_migration()
2561 	int isolated;  in migrate_misplaced_page()  local
2582 	isolated = numamigrate_isolate_page(pgdat, page);  in migrate_misplaced_page()
2583 	if (!isolated)  in migrate_misplaced_page()
2597 		isolated = 0;  in migrate_misplaced_page()
2606 	return isolated;  in migrate_misplaced_page()