From patchwork Mon Jul 12 19:01:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12371947 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D5B6C07E99 for ; Mon, 12 Jul 2021 19:10:39 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2D4F260E08 for ; Mon, 12 Jul 2021 19:10:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D4F260E08 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 598A66B0095; Mon, 12 Jul 2021 15:10:39 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5482B6B0098; Mon, 12 Jul 2021 15:10:39 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3E86A6B0099; Mon, 12 Jul 2021 15:10:39 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0223.hostedemail.com [216.40.44.223]) by kanga.kvack.org (Postfix) with ESMTP id 148B56B0095 for ; Mon, 12 Jul 2021 15:10:39 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 348551C987 for ; Mon, 12 Jul 2021 19:10:38 +0000 (UTC) X-FDA: 78354877356.03.B84C8E4 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf07.hostedemail.com (Postfix) with ESMTP id EC59D1003ED2 for ; Mon, 12 Jul 2021 19:10:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=0KdZB3gPghk1DGDKMUM+cSe9HgLJApMZfQlb0sKNdL8=; b=F+OY1JN51h4d9WzoiCkHkSAva1 aH45ZMB/k8BWTzIKSCF3lHQq4Mim9En7IwIKsDxD6ea7yFvJ7k4GwBuBb8XZAFiDvhDU4PE/uLxDE GQmeS/TUXdR14EYDSlsXryd88xectlb3l5Vzna8lzdIW50UICfAvtcXz1ZF7dEIyB5tXPcN4FIzyR cBR0kk+UVV/SpzwLD0CYBdhIZ6IPEUfuSOUqqOtMXCdZTG/d8QeVJOtxNO+vkOyL0UCxzNKH2MhlQ jioHofSlEFHDYudeqrtG1+TCBxjqFWgh1G6D8Mva/n0KzLARS4ye1LP5nZAHYX8DHwrUnUiU3bA1W kNo5bUcw==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m31Il-000LjC-LG; Mon, 12 Jul 2021 19:09:34 +0000 From: "Matthew Wilcox (Oracle)" To: akpm@linux-foundation.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Christoph Hellwig , Jeff Layton , "Kirill A . Shutemov" , Vlastimil Babka , William Kucharski , David Howells Subject: [PATCH v13 14/32] mm/filemap: Add folio_next_index() Date: Mon, 12 Jul 2021 20:01:46 +0100 Message-Id: <20210712190204.80979-15-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210712190204.80979-1-willy@infradead.org> References: <20210712190204.80979-1-willy@infradead.org> MIME-Version: 1.0 Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=F+OY1JN5; spf=none (imf07.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none X-Rspamd-Server: rspam02 X-Stat-Signature: qbn4spdfbpzhnhuw33j9fymbwe1g6cg4 X-Rspamd-Queue-Id: EC59D1003ED2 X-HE-Tag: 1626117037-53416 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This helper returns the page index of the next folio in the file (ie the end of this folio, plus one). No changes to generated code. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Acked-by: Jeff Layton Acked-by: Kirill A. Shutemov Acked-by: Vlastimil Babka Reviewed-by: William Kucharski Reviewed-by: David Howells --- include/linux/pagemap.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 8cc67ddb47d4..aac447fbaddd 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -406,6 +406,17 @@ static inline pgoff_t folio_index(struct folio *folio) return folio->index; } +/** + * folio_next_index - Get the index of the next folio. + * @folio: The current folio. + * + * Return: The index of the folio which follows this folio in the file. + */ +static inline pgoff_t folio_next_index(struct folio *folio) +{ + return folio->index + folio_nr_pages(folio); +} + /** * folio_file_page - The page for a particular index. * @folio: The folio which contains this index.