151 			pgoff_t offset, unsigned long nr_to_read,  in __do_page_cache_readahead()  argument
172 		pgoff_t page_offset = offset + page_idx;  in __do_page_cache_readahead()
210 			       pgoff_t offset, unsigned long nr_to_read)  in force_page_cache_readahead()  argument
233 						offset, this_chunk, 0);  in force_page_cache_readahead()
237 		offset += this_chunk;  in force_page_cache_readahead()
327 				   pgoff_t offset, unsigned long max)  in count_history_pages()  argument
332 	head = page_cache_prev_hole(mapping, offset - 1, max);  in count_history_pages()
335 	return offset - 1 - head;  in count_history_pages()
343 				 pgoff_t offset,  in try_context_readahead()  argument
349 	size = count_history_pages(mapping, offset, max);  in try_context_readahead()
362 	if (size >= offset)  in try_context_readahead()
365 	ra->start = offset;  in try_context_readahead()
378 		   bool hit_readahead_marker, pgoff_t offset,  in ondemand_readahead()  argument
396 	if (!offset)  in ondemand_readahead()
403 	if ((offset == (ra->start + ra->size - ra->async_size) ||  in ondemand_readahead()
404 	     offset == (ra->start + ra->size))) {  in ondemand_readahead()
421 		start = page_cache_next_hole(mapping, offset + 1, max_pages);  in ondemand_readahead()
424 		if (!start || start - offset > max_pages)  in ondemand_readahead()
428 		ra->size = start - offset;	/* old async_size */  in ondemand_readahead()
447 	if (offset - prev_offset <= 1UL)  in ondemand_readahead()
454 	if (try_context_readahead(mapping, ra, offset, req_size, max_pages))  in ondemand_readahead()
461 	return __do_page_cache_readahead(mapping, filp, offset, req_size, 0);  in ondemand_readahead()
464 	ra->start = offset;  in ondemand_readahead()
475 	if (offset == ra->start && ra->size == ra->async_size) {  in ondemand_readahead()
505 			       pgoff_t offset, unsigned long req_size)  in page_cache_sync_readahead()  argument
513 		force_page_cache_readahead(mapping, filp, offset, req_size);  in page_cache_sync_readahead()
518 	ondemand_readahead(mapping, ra, filp, false, offset, req_size);  in page_cache_sync_readahead()
540 			   struct page *page, pgoff_t offset,  in page_cache_async_readahead()  argument
562 	ondemand_readahead(mapping, ra, filp, true, offset, req_size);  in page_cache_async_readahead()
584 SYSCALL_DEFINE3(readahead, int, fd, loff_t, offset, size_t, count)  in SYSCALL_DEFINE3()  argument
594 			pgoff_t start = offset >> PAGE_SHIFT;  in SYSCALL_DEFINE3()
595 			pgoff_t end = (offset + count - 1) >> PAGE_SHIFT;  in SYSCALL_DEFINE3()