251 static unsigned long get_init_ra_size(unsigned long size, unsigned long max)  in get_init_ra_size()  argument
255 	if (newsize <= max / 32)  in get_init_ra_size()
257 	else if (newsize <= max / 4)  in get_init_ra_size()
260 		newsize = max;  in get_init_ra_size()
270 						unsigned long max)  in get_next_ra_size()  argument
275 	if (cur < max / 16)  in get_next_ra_size()
280 	return min(newsize, max);  in get_next_ra_size()
329 				   pgoff_t offset, unsigned long max)  in count_history_pages()  argument
334 	head = page_cache_prev_hole(mapping, offset - 1, max);  in count_history_pages()
347 				 unsigned long max)  in try_context_readahead()  argument
351 	size = count_history_pages(mapping, offset, max);  in try_context_readahead()
368 	ra->size = min(size + req_size, max);  in try_context_readahead()
383 	unsigned long max = max_sane_readahead(ra->ra_pages);  in ondemand_readahead()  local
399 		ra->size = get_next_ra_size(ra, max);  in ondemand_readahead()
414 		start = page_cache_next_hole(mapping, offset + 1, max);  in ondemand_readahead()
417 		if (!start || start - offset > max)  in ondemand_readahead()
423 		ra->size = get_next_ra_size(ra, max);  in ondemand_readahead()
431 	if (req_size > max)  in ondemand_readahead()
447 	if (try_context_readahead(mapping, ra, offset, req_size, max))  in ondemand_readahead()
458 	ra->size = get_init_ra_size(req_size, max);  in ondemand_readahead()
468 		ra->async_size = get_next_ra_size(ra, max);  in ondemand_readahead()