From mboxrd@z Thu Jan 1 00:00:00 1970 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 1A01BC433ED for ; Fri, 30 Apr 2021 18:19:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E07EA613D9 for ; Fri, 30 Apr 2021 18:19:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230093AbhD3SUR (ORCPT ); Fri, 30 Apr 2021 14:20:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229750AbhD3SUQ (ORCPT ); Fri, 30 Apr 2021 14:20:16 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 64B5EC06174A for ; Fri, 30 Apr 2021 11:19:28 -0700 (PDT) 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=MQWigVgSxiMJMY3AZ5E7xkUCOt fQBnjq2ev2vucJjjX5RBna7DTOBkruQ+LzAttXZg18YleCZIwO3/8if1mxHS3Z0nTrJ0++QDQ/D3Q wRY0pYcp3JKhYtxkb+Bi2kxFIJzVmALHQrUVQ47lBoriTwhhW2ncx1p6zR54MSoYbcNkng1FX9ihS A9QMzDPMk3kWvu+AsJOrGnshyBtJ91dnDsd8/RFCKo4LF05aMjEaLtmMRh2MJ7z7a/ywN7jL0PMUC Eu8Hdxb58zzjye17kobCrbWuNir/6rwFz9/tRBVqLrE1LbVcIwX/0h1aHGCpArkJEJhDSh6tDPRwd LGf3bDKA==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lcXi8-00BMuW-Td; Fri, 30 Apr 2021 18:18:17 +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 12/31] mm/filemap: Add folio_next_index Date: Fri, 30 Apr 2021 19:07:21 +0100 Message-Id: <20210430180740.2707166-13-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210430180740.2707166-1-willy@infradead.org> References: <20210430180740.2707166-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org 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. -- 2.30.2