From patchwork Fri Apr 9 18:50:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12194881 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=-16.5 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,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 2F330C433B4 for ; Fri, 9 Apr 2021 19:00:44 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A90E761106 for ; Fri, 9 Apr 2021 19:00:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A90E761106 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 448F76B006C; Fri, 9 Apr 2021 15:00:43 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3E5E66B006E; Fri, 9 Apr 2021 15:00:43 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 289206B0070; Fri, 9 Apr 2021 15:00:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0157.hostedemail.com [216.40.44.157]) by kanga.kvack.org (Postfix) with ESMTP id 0800F6B006C for ; Fri, 9 Apr 2021 15:00:43 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id BC4B8365F for ; Fri, 9 Apr 2021 19:00:42 +0000 (UTC) X-FDA: 78013745124.12.699C386 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf16.hostedemail.com (Postfix) with ESMTP id D46A7801C7D8 for ; Fri, 9 Apr 2021 19:00:41 +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=Jy8OgE/ibRhYpmxJWqJ5F9J87NOfXTTmiZFJczWvAp4=; b=BwgYB9MBM7oWYpGFyfrTwgPYE7 ZSfW3lcXj4cSu2aNL0y8k4aEem7psK5ME7uwysts4LogpBrG3VvT4d4L7T1V60cRxyh31lNPbm/v7 ocqrpv4eMepzMZ1h8b37Ohpcm1QXhWvNNjkQuHX0Eo7nWlT4eC8Tn/TYfsoQbYvu1DuoMuFWohSBy mKDDEfrInd0kzeEw0XyVPy3HHITvgLDFzix0kr2+2IBFl6EYChQLztkXZJ873GEWGh2mvjlZMvzF+ 3eIDQcAHi7crkwY0u/ue4DowFsMVpaJ6g2Xoz+fNXbd76qvlYhU6sjY3eZJC3xuIH4fSHDehmay1o nC3U8MKQ==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lUwLn-000nlx-Ee; Fri, 09 Apr 2021 18:59:42 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-cachefs@redhat.com, linux-afs@lists.infradead.org, Christoph Hellwig , Jeff Layton Subject: [PATCH v7 12/28] mm/filemap: Add folio_next_index Date: Fri, 9 Apr 2021 19:50:49 +0100 Message-Id: <20210409185105.188284-13-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210409185105.188284-1-willy@infradead.org> References: <20210409185105.188284-1-willy@infradead.org> MIME-Version: 1.0 X-Stat-Signature: 9mh1wacuuam5m1dq5f9bnzx6am9gkamo X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: D46A7801C7D8 Received-SPF: none (infradead.org>: No applicable sender policy available) receiver=imf16; identity=mailfrom; envelope-from=""; helo=casper.infradead.org; client-ip=90.155.50.34 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1617994841-894016 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). Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Acked-by: Jeff Layton --- include/linux/pagemap.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index a8b108a9ac6e..5130503519b0 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -482,6 +482,17 @@ 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.