174 void page_cache_ra_unbounded(struct readahead_control *ractl,  in page_cache_ra_unbounded()  argument
177 	struct address_space *mapping = ractl->mapping;  in page_cache_ra_unbounded()
178 	unsigned long index = readahead_index(ractl);  in page_cache_ra_unbounded()
201 		BUG_ON(index + i != ractl->_index + ractl->_nr_pages);  in page_cache_ra_unbounded()
212 			read_pages(ractl, &page_pool, true);  in page_cache_ra_unbounded()
225 			read_pages(ractl, &page_pool, true);  in page_cache_ra_unbounded()
230 		ractl->_nr_pages++;  in page_cache_ra_unbounded()
238 	read_pages(ractl, &page_pool, false);  in page_cache_ra_unbounded()
249 void do_page_cache_ra(struct readahead_control *ractl,  in do_page_cache_ra()  argument
252 	struct inode *inode = ractl->mapping->host;  in do_page_cache_ra()
253 	unsigned long index = readahead_index(ractl);  in do_page_cache_ra()
267 	page_cache_ra_unbounded(ractl, nr_to_read, lookahead_size);  in do_page_cache_ra()
274 void force_page_cache_ra(struct readahead_control *ractl,  in force_page_cache_ra()  argument
277 	struct address_space *mapping = ractl->mapping;  in force_page_cache_ra()
289 	index = readahead_index(ractl);  in force_page_cache_ra()
297 		ractl->_index = index;  in force_page_cache_ra()
298 		do_page_cache_ra(ractl, this_chunk, 0);  in force_page_cache_ra()
435 static void ondemand_readahead(struct readahead_control *ractl,  in ondemand_readahead()  argument
439 	struct backing_dev_info *bdi = inode_to_bdi(ractl->mapping->host);  in ondemand_readahead()
442 	unsigned long index = readahead_index(ractl);  in ondemand_readahead()
480 		start = page_cache_next_miss(ractl->mapping, index + 1,  in ondemand_readahead()
514 	if (try_context_readahead(ractl->mapping, ra, index, req_size,  in ondemand_readahead()
522 	do_page_cache_ra(ractl, req_size, 0);  in ondemand_readahead()
548 	ractl->_index = ra->start;  in ondemand_readahead()
549 	do_page_cache_ra(ractl, ra->size, ra->async_size);  in ondemand_readahead()
552 void page_cache_sync_ra(struct readahead_control *ractl,  in page_cache_sync_ra()  argument
555 	bool do_forced_ra = ractl->file && (ractl->file->f_mode & FMODE_RANDOM);  in page_cache_sync_ra()
564 		if (!ractl->file)  in page_cache_sync_ra()
572 		force_page_cache_ra(ractl, ra, req_count);  in page_cache_sync_ra()
577 	ondemand_readahead(ractl, ra, false, req_count);  in page_cache_sync_ra()
581 void page_cache_async_ra(struct readahead_control *ractl,  in page_cache_async_ra()  argument
600 	if (inode_read_congested(ractl->mapping->host))  in page_cache_async_ra()
607 	ondemand_readahead(ractl, ra, true, req_count);  in page_cache_async_ra()