page_cache_async_ra
void page_cache_async_ra(struct readahead_control *, struct folio *,
page_cache_async_ra(&ractl, folio, req_count);
DEFINE_EVENT(page_cache_ra_op, page_cache_async_ra,
page_cache_async_ra(&ractl, folio, last_index - folio->index);
page_cache_async_ra(&ractl, folio, ra->ra_pages);
EXPORT_SYMBOL_GPL(page_cache_async_ra);