diff --git a/mm/filemap.c b/mm/filemap.c
index 99977f0a94e4719f9a3644ff018aa35ea3cfbc6f..5c0c6518f3411a68cc2abb3881e73e42eaf473a8 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1516,7 +1516,8 @@ static void do_async_mmap_readahead(struct vm_area_struct *vma,
 	if (ra->mmap_miss > 0)
 		ra->mmap_miss--;
 	if (PageReadahead(page))
-		page_cache_async_readahead(mapping, ra, file, page, offset, 1);
+		page_cache_async_readahead(mapping, ra, file,
+					   page, offset, ra->ra_pages);
 }
 
 /**