From patchwork Fri Apr 30 17:22:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12233859 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,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 E258BC43462 for ; Fri, 30 Apr 2021 17:32:49 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6B41D61574 for ; Fri, 30 Apr 2021 17:32:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6B41D61574 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 E89266B0070; Fri, 30 Apr 2021 13:32:48 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E39B76B0071; Fri, 30 Apr 2021 13:32:48 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CFF2B6B0072; Fri, 30 Apr 2021 13:32:48 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0172.hostedemail.com [216.40.44.172]) by kanga.kvack.org (Postfix) with ESMTP id B59296B0070 for ; Fri, 30 Apr 2021 13:32:48 -0400 (EDT) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 7288C181AF5C3 for ; Fri, 30 Apr 2021 17:32:48 +0000 (UTC) X-FDA: 78089728416.11.B126E45 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf21.hostedemail.com (Postfix) with ESMTP id 711B1E00012D for ; Fri, 30 Apr 2021 17:32:44 +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=azsNkQzXElyIzJuUMmTts2EKSUJP8PUH3fVrpjR5ykw=; b=WRoVIwtu+5i6yxwswpY31J5qzz cHn2XhAwtL2NKBT3GuPHBP4/xzdMNbeB7muxns3j9PI9k8mB0WjjQTKLOaoZ2uWRYMSIclRKj+uNV 2YTH1HQfY76VLz7vKCyqEihlhyXsQxoAefIzyX1TVMfGh9HLAUgWpnVQj/CisVC7UrzgFqrvWHChA oztbM18GmM3zXfZc3fnxvR2KMvFISqFdeCgz2lt4gXs/QyiN7Ma6M2WK8zIxRtzk4O86ZJYo0ZQQJ dwUAt/KlwjT3in5QeTg11I1MNxmnOXfSP0zFSNXcewl3snZvh9aIQ1ddi921WrjWzVmIeZXdi562M hFU/qy/w==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lcWzL-00BJm7-Dg; Fri, 30 Apr 2021 17:31:49 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, akpm@linux-foundation.org Cc: "Matthew Wilcox (Oracle)" , Christoph Hellwig , Jeff Layton Subject: [PATCH v8 12/27] mm/filemap: Add folio_next_index Date: Fri, 30 Apr 2021 18:22:20 +0100 Message-Id: <20210430172235.2695303-13-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210430172235.2695303-1-willy@infradead.org> References: <20210430172235.2695303-1-willy@infradead.org> MIME-Version: 1.0 Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=WRoVIwtu; spf=none (imf21.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: rspam01 X-Rspamd-Queue-Id: 711B1E00012D X-Stat-Signature: 8mrbtt5wyss33ghjgnyskpjyh5jkcmt7 Received-SPF: none (infradead.org>: No applicable sender policy available) receiver=imf21; identity=mailfrom; envelope-from=""; helo=casper.infradead.org; client-ip=90.155.50.34 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1619803964-748783 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 58c9b98604d0..5301131cc5b3 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.