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 EFAF2C433ED for ; Fri, 30 Apr 2021 17:32:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B8CD561468 for ; Fri, 30 Apr 2021 17:32:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231264AbhD3Rdk (ORCPT ); Fri, 30 Apr 2021 13:33:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231270AbhD3Rdh (ORCPT ); Fri, 30 Apr 2021 13:33:37 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5BC7DC06174A for ; Fri, 30 Apr 2021 10:32:48 -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=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 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