Commit 0387df1d authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

readahead: Convert page_cache_ra_unbounded to folios 



This saves 99 bytes of kernel text.

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarWilliam Kucharski <william.kucharski@oracle.com>
parent 7836d999

mm/readahead.c

+9 −9
Original line number Diff line number Diff line
@@ -196,9 +196,9 @@ void page_cache_ra_unbounded(struct readahead_control *ractl, 
	 * Preallocate as many pages as we will need.

	 */

	for (i = 0; i < nr_to_read; i++) {

		struct page *page = xa_load(&mapping->i_pages, index + i);

		struct folio *folio = xa_load(&mapping->i_pages, index + i);



		if (page && !xa_is_value(page)) {

		if (folio && !xa_is_value(folio)) {

			/*

			 * Page already present?  Kick off the current batch

			 * of contiguous pages before continuing with the
@@ -212,21 +212,21 @@ void page_cache_ra_unbounded(struct readahead_control *ractl, 
			continue;

		}



		page = __page_cache_alloc(gfp_mask);

		if (!page)

		folio = filemap_alloc_folio(gfp_mask, 0);

		if (!folio)

			break;

		if (mapping->a_ops->readpages) {

			page->index = index + i;

			list_add(&page->lru, &page_pool);

		} else if (add_to_page_cache_lru(page, mapping, index + i,

			folio->index = index + i;

			list_add(&folio->lru, &page_pool);

		} else if (filemap_add_folio(mapping, folio, index + i,

					gfp_mask) < 0) {

			put_page(page);

			folio_put(folio);

			read_pages(ractl, &page_pool, true);

			i = ractl->_index + ractl->_nr_pages - index - 1;

			continue;

		}

		if (i == nr_to_read - lookahead_size)

			SetPageReadahead(page);

			folio_set_readahead(folio);

		ractl->_nr_pages++;

	}