312 int migrate_page_move_mapping(struct address_space *mapping,  in migrate_page_move_mapping()  argument
322 	if (!mapping) {  in migrate_page_move_mapping()
330 		newpage->mapping = page->mapping;  in migrate_page_move_mapping()
340 	spin_lock_irq(&mapping->tree_lock);  in migrate_page_move_mapping()
342 	pslot = radix_tree_lookup_slot(&mapping->page_tree,  in migrate_page_move_mapping()
347 		radix_tree_deref_slot_protected(pslot, &mapping->tree_lock) != page) {  in migrate_page_move_mapping()
348 		spin_unlock_irq(&mapping->tree_lock);  in migrate_page_move_mapping()
353 		spin_unlock_irq(&mapping->tree_lock);  in migrate_page_move_mapping()
367 		spin_unlock_irq(&mapping->tree_lock);  in migrate_page_move_mapping()
377 	newpage->mapping = page->mapping;  in migrate_page_move_mapping()
403 	spin_unlock(&mapping->tree_lock);  in migrate_page_move_mapping()
423 		if (dirty && mapping_cap_account_dirty(mapping)) {  in migrate_page_move_mapping()
437 int migrate_huge_page_move_mapping(struct address_space *mapping,  in migrate_huge_page_move_mapping()  argument
443 	spin_lock_irq(&mapping->tree_lock);  in migrate_huge_page_move_mapping()
445 	pslot = radix_tree_lookup_slot(&mapping->page_tree,  in migrate_huge_page_move_mapping()
450 		radix_tree_deref_slot_protected(pslot, &mapping->tree_lock) != page) {  in migrate_huge_page_move_mapping()
451 		spin_unlock_irq(&mapping->tree_lock);  in migrate_huge_page_move_mapping()
456 		spin_unlock_irq(&mapping->tree_lock);  in migrate_huge_page_move_mapping()
462 	newpage->mapping = page->mapping;  in migrate_huge_page_move_mapping()
469 	spin_unlock_irq(&mapping->tree_lock);  in migrate_huge_page_move_mapping()
593 int migrate_page(struct address_space *mapping,  in migrate_page()  argument
601 	rc = migrate_page_move_mapping(mapping, newpage, page, NULL, mode, 0);  in migrate_page()
617 int buffer_migrate_page(struct address_space *mapping,  in buffer_migrate_page()  argument
624 		return migrate_page(mapping, newpage, page, mode);  in buffer_migrate_page()
628 	rc = migrate_page_move_mapping(mapping, newpage, page, head, mode, 0);  in buffer_migrate_page()
674 static int writeout(struct address_space *mapping, struct page *page)  in writeout()  argument
685 	if (!mapping->a_ops->writepage)  in writeout()
703 	rc = mapping->a_ops->writepage(page, &wbc);  in writeout()
715 static int fallback_migrate_page(struct address_space *mapping,  in fallback_migrate_page()  argument
722 		return writeout(mapping, page);  in fallback_migrate_page()
733 	return migrate_page(mapping, newpage, page, mode);  in fallback_migrate_page()
750 	struct address_space *mapping;  in move_to_new_page()  local
756 	mapping = page_mapping(page);  in move_to_new_page()
757 	if (!mapping)  in move_to_new_page()
758 		rc = migrate_page(mapping, newpage, page, mode);  in move_to_new_page()
759 	else if (mapping->a_ops->migratepage)  in move_to_new_page()
766 		rc = mapping->a_ops->migratepage(mapping, newpage, page, mode);  in move_to_new_page()
768 		rc = fallback_migrate_page(mapping, newpage, page, mode);  in move_to_new_page()
777 			page->mapping = NULL;  in move_to_new_page()
880 	if (!page->mapping) {  in __unmap_and_move()
1780 	new_page->mapping = page->mapping;  in migrate_misplaced_transhuge_page()