308 int migrate_page_move_mapping(struct address_space *mapping,  in migrate_page_move_mapping()  argument
316 	if (!mapping) {  in migrate_page_move_mapping()
323 	spin_lock_irq(&mapping->tree_lock);  in migrate_page_move_mapping()
325 	pslot = radix_tree_lookup_slot(&mapping->page_tree,  in migrate_page_move_mapping()
330 		radix_tree_deref_slot_protected(pslot, &mapping->tree_lock) != page) {  in migrate_page_move_mapping()
331 		spin_unlock_irq(&mapping->tree_lock);  in migrate_page_move_mapping()
336 		spin_unlock_irq(&mapping->tree_lock);  in migrate_page_move_mapping()
350 		spin_unlock_irq(&mapping->tree_lock);  in migrate_page_move_mapping()
388 	spin_unlock_irq(&mapping->tree_lock);  in migrate_page_move_mapping()
397 int migrate_huge_page_move_mapping(struct address_space *mapping,  in migrate_huge_page_move_mapping()  argument
403 	if (!mapping) {  in migrate_huge_page_move_mapping()
409 	spin_lock_irq(&mapping->tree_lock);  in migrate_huge_page_move_mapping()
411 	pslot = radix_tree_lookup_slot(&mapping->page_tree,  in migrate_huge_page_move_mapping()
416 		radix_tree_deref_slot_protected(pslot, &mapping->tree_lock) != page) {  in migrate_huge_page_move_mapping()
417 		spin_unlock_irq(&mapping->tree_lock);  in migrate_huge_page_move_mapping()
422 		spin_unlock_irq(&mapping->tree_lock);  in migrate_huge_page_move_mapping()
432 	spin_unlock_irq(&mapping->tree_lock);  in migrate_huge_page_move_mapping()
563 int migrate_page(struct address_space *mapping,  in migrate_page()  argument
571 	rc = migrate_page_move_mapping(mapping, newpage, page, NULL, mode, 0);  in migrate_page()
587 int buffer_migrate_page(struct address_space *mapping,  in buffer_migrate_page()  argument
594 		return migrate_page(mapping, newpage, page, mode);  in buffer_migrate_page()
598 	rc = migrate_page_move_mapping(mapping, newpage, page, head, mode, 0);  in buffer_migrate_page()
644 static int writeout(struct address_space *mapping, struct page *page)  in writeout()  argument
655 	if (!mapping->a_ops->writepage)  in writeout()
673 	rc = mapping->a_ops->writepage(page, &wbc);  in writeout()
685 static int fallback_migrate_page(struct address_space *mapping,  in fallback_migrate_page()  argument
692 		return writeout(mapping, page);  in fallback_migrate_page()
703 	return migrate_page(mapping, newpage, page, mode);  in fallback_migrate_page()
720 	struct address_space *mapping;  in move_to_new_page()  local
733 	newpage->mapping = page->mapping;  in move_to_new_page()
737 	mapping = page_mapping(page);  in move_to_new_page()
738 	if (!mapping)  in move_to_new_page()
739 		rc = migrate_page(mapping, newpage, page, mode);  in move_to_new_page()
740 	else if (mapping->a_ops->migratepage)  in move_to_new_page()
747 		rc = mapping->a_ops->migratepage(mapping,  in move_to_new_page()
750 		rc = fallback_migrate_page(mapping, newpage, page, mode);  in move_to_new_page()
753 		newpage->mapping = NULL;  in move_to_new_page()
758 		page->mapping = NULL;  in move_to_new_page()
871 	if (!page->mapping) {  in __unmap_and_move()
1759 	new_page->mapping = page->mapping;  in migrate_misplaced_transhuge_page()