From patchwork Fri Mar 20 14:22:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 11449221 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 859701668 for ; Fri, 20 Mar 2020 14:23:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B75120776 for ; Fri, 20 Mar 2020 14:23:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="deGAQsoV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727308AbgCTOWe (ORCPT ); Fri, 20 Mar 2020 10:22:34 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:59748 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727209AbgCTOWd (ORCPT ); Fri, 20 Mar 2020 10:22:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=yWCBnvZVE3mmN89bJgz6VBayzBfFVIn+l+u0xcbyIA0=; b=deGAQsoVntPgsI+2QSGHOLEoOX uSbzvpNzOlMtAyBhInlzlhkSgyBzf7AYCDlgPhpH3fhpJ6WXwho/SvHn0T2IqqSC5cf76a1KGQNkA BRbRE55acqnKuGpuZYyXQCcs/twImkjG/z1LsUgzER/4eWdRrf/6seqewUpC5yVtN42X6l2TD4Gc7 qtV7IQoxq3iQ3DcXnMw0Aa1LDc9BL7CnEPo8lPoBGKn2odheQzzhAkkSRrnXt/8F4MOfsszK+aAI7 8MAzPbejsUJEvS2pfOn6++ZN8iE0gE6N+VZlEYBDsFnam4WJFBvMGcWi7thKCquZ3mQ39eoQOoi7f 8jdnKclA==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jFIXh-0000hw-EC; Fri, 20 Mar 2020 14:22:33 +0000 From: Matthew Wilcox To: Andrew Morton Cc: "Matthew Wilcox (Oracle)" , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, ocfs2-devel@oss.oracle.com, linux-xfs@vger.kernel.org, John Hubbard , Christoph Hellwig , William Kucharski Subject: [PATCH v9 09/25] mm: Remove 'page_offset' from readahead loop Date: Fri, 20 Mar 2020 07:22:15 -0700 Message-Id: <20200320142231.2402-10-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200320142231.2402-1-willy@infradead.org> References: <20200320142231.2402-1-willy@infradead.org> MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: "Matthew Wilcox (Oracle)" Replace the page_offset variable with 'index + i'. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: John Hubbard Reviewed-by: Christoph Hellwig Reviewed-by: William Kucharski --- mm/readahead.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/mm/readahead.c b/mm/readahead.c index 7ce320854bad..ddc63d3b07b8 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -180,12 +180,10 @@ void __do_page_cache_readahead(struct address_space *mapping, * Preallocate as many pages as we will need. */ for (i = 0; i < nr_to_read; i++) { - pgoff_t page_offset = index + i; - - if (page_offset > end_index) + if (index + i > end_index) break; - page = xa_load(&mapping->i_pages, page_offset); + page = xa_load(&mapping->i_pages, index + i); if (page && !xa_is_value(page)) { /* * Page already present? Kick off the current batch of @@ -199,7 +197,7 @@ void __do_page_cache_readahead(struct address_space *mapping, page = __page_cache_alloc(gfp_mask); if (!page) break; - page->index = page_offset; + page->index = index + i; list_add(&page->lru, &page_pool); if (i == nr_to_read - lookahead_size) SetPageReadahead(page);