/* If the page does not get brought uptodate, return -EIO.  */
struct page* read_cache_page_async(struct address_space *mapping, pgoff_t index, int(*filler)(void *, struct page *), void *data)
/* If the page does not get brought uptodate, return -EIO.  */
struct page* read_cache_page_async(struct address_space *mapping, pgoff_t index, int(*filler)(void *, struct page *), void *data)
{
	return do_read_cache_page(mapping, index, filler, data, mapping_gfp_mask(mapping));
}