28 file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping)  in file_ra_state_init()  argument
30 	ra->ra_pages = inode_to_bdi(mapping->host)->ra_pages;  in file_ra_state_init()
44 static void read_cache_pages_invalidate_page(struct address_space *mapping,  in read_cache_pages_invalidate_page()  argument
50 		page->mapping = mapping;  in read_cache_pages_invalidate_page()
52 		page->mapping = NULL;  in read_cache_pages_invalidate_page()
61 static void read_cache_pages_invalidate_pages(struct address_space *mapping,  in read_cache_pages_invalidate_pages()  argument
69 		read_cache_pages_invalidate_page(mapping, victim);  in read_cache_pages_invalidate_pages()
83 int read_cache_pages(struct address_space *mapping, struct list_head *pages,  in read_cache_pages()  argument
92 		if (add_to_page_cache_lru(page, mapping, page->index,  in read_cache_pages()
93 				mapping_gfp_constraint(mapping, GFP_KERNEL))) {  in read_cache_pages()
94 			read_cache_pages_invalidate_page(mapping, page);  in read_cache_pages()
101 			read_cache_pages_invalidate_pages(mapping, pages);  in read_cache_pages()
111 static int read_pages(struct address_space *mapping, struct file *filp,  in read_pages()  argument
120 	if (mapping->a_ops->readpages) {  in read_pages()
121 		ret = mapping->a_ops->readpages(filp, mapping, pages, nr_pages);  in read_pages()
130 		if (!add_to_page_cache_lru(page, mapping, page->index,  in read_pages()
131 				mapping_gfp_constraint(mapping, GFP_KERNEL))) {  in read_pages()
132 			mapping->a_ops->readpage(filp, page);  in read_pages()
152 int __do_page_cache_readahead(struct address_space *mapping, struct file *filp,  in __do_page_cache_readahead()  argument
156 	struct inode *inode = mapping->host;  in __do_page_cache_readahead()
179 		page = radix_tree_lookup(&mapping->page_tree, page_offset);  in __do_page_cache_readahead()
184 		page = page_cache_alloc_readahead(mapping);  in __do_page_cache_readahead()
200 		read_pages(mapping, filp, &page_pool, ret);  in __do_page_cache_readahead()
210 int force_page_cache_readahead(struct address_space *mapping, struct file *filp,  in force_page_cache_readahead()  argument
213 	if (unlikely(!mapping->a_ops->readpage && !mapping->a_ops->readpages))  in force_page_cache_readahead()
216 	nr_to_read = min(nr_to_read, inode_to_bdi(mapping->host)->ra_pages);  in force_page_cache_readahead()
224 		err = __do_page_cache_readahead(mapping, filp,  in force_page_cache_readahead()
318 static pgoff_t count_history_pages(struct address_space *mapping,  in count_history_pages()  argument
324 	head = page_cache_prev_hole(mapping, offset - 1, max);  in count_history_pages()
333 static int try_context_readahead(struct address_space *mapping,  in try_context_readahead()  argument
341 	size = count_history_pages(mapping, offset, max);  in try_context_readahead()
368 ondemand_readahead(struct address_space *mapping,  in ondemand_readahead()  argument
404 		start = page_cache_next_hole(mapping, offset + 1, max);  in ondemand_readahead()
437 	if (try_context_readahead(mapping, ra, offset, req_size, max))  in ondemand_readahead()
444 	return __do_page_cache_readahead(mapping, filp, offset, req_size, 0);  in ondemand_readahead()
462 	return ra_submit(ra, mapping, filp);  in ondemand_readahead()
479 void page_cache_sync_readahead(struct address_space *mapping,  in page_cache_sync_readahead()  argument
489 		force_page_cache_readahead(mapping, filp, offset, req_size);  in page_cache_sync_readahead()
494 	ondemand_readahead(mapping, ra, filp, false, offset, req_size);  in page_cache_sync_readahead()
514 page_cache_async_readahead(struct address_space *mapping,  in page_cache_async_readahead()  argument
534 	if (inode_read_congested(mapping->host))  in page_cache_async_readahead()
538 	ondemand_readahead(mapping, ra, filp, true, offset, req_size);  in page_cache_async_readahead()
543 do_readahead(struct address_space *mapping, struct file *filp,  in do_readahead()  argument
546 	if (!mapping || !mapping->a_ops)  in do_readahead()
549 	return force_page_cache_readahead(mapping, filp, index, nr);  in do_readahead()
561 			struct address_space *mapping = f.file->f_mapping;  in SYSCALL_DEFINE3()  local
565 			ret = do_readahead(mapping, f.file, start, len);  in SYSCALL_DEFINE3()