1bda9dad5a
->writepage is a very inefficient method to write back data, and only used through write_cache_pages or a a fallback when no ->migrate_folio method is present. Set ->migrate_folio to the generic buffer_head based helper, and remove the ->writepage implementation. Link: https://lkml.kernel.org/r/20221202102644.770505-8-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Bob Copeland <me@bobcopeland.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>