Re: [PATCH v6 13/27] mm/util: Add folio_mapping and folio_file_mapping

Looks good, Reviewed-by: Christoph Hellwig

[PATCH v6 13/27] mm/util: Add folio_mapping and folio_file_mapping

These are the folio equivalent of page_mapping() and page_file_mapping(). Add an out-of-line page_mapping() wrapper around folio_mapping() in order to prevent the page_folio() call from bloating every caller of page_mapping(). Adjust page_file_mapping() and page_mapping_file() to use folios intern