filemap: Convert do_async_mmap_readahead to take a folio

Call page_cache_async_ra() directly instead of indirecting through
page_cache_async_readahead().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-07-29 14:57:01 -04:00
commit 79598cedad