From patchwork Wed Mar 31 18:47:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12175981 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 5A7D5C433B4 for ; Wed, 31 Mar 2021 18:52:02 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 07C0D61055 for ; Wed, 31 Mar 2021 18:52:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 07C0D61055 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 9EE806B009F; Wed, 31 Mar 2021 14:52:01 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 978516B00A0; Wed, 31 Mar 2021 14:52:01 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7F1AB6B00A1; Wed, 31 Mar 2021 14:52:01 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0066.hostedemail.com [216.40.44.66]) by kanga.kvack.org (Postfix) with ESMTP id 4A8786B009F for ; Wed, 31 Mar 2021 14:52:01 -0400 (EDT) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id F3F88181AF5C4 for ; Wed, 31 Mar 2021 18:52:00 +0000 (UTC) X-FDA: 77981064042.05.FE2E793 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf21.hostedemail.com (Postfix) with ESMTP id 1EA40E0011C4 for ; Wed, 31 Mar 2021 18:51:59 +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=J9McjwmMfYw4xRYFCKHIFxwFXE7/kt39jJTAhXblis8=; b=WMzDYFuT6QIGU46/aq0G+JNuNm rYxWWMKold9NpNzv+COe+HMa4XhYRbBjH++3KjJLZFp/HHbuvU5vzNDMj2vo26tPVlnnT7Z0vcf22 YDHghd8sK8EWi5ns/4Yi8g+1MmafgaosW97wJmXL5JGH6rQFTGIx+3AGUigJnBnt1EI8MGwH1u1Dq vfwK2vV/vKlhg8RBzEXSTpodclj9O+WuLBhoJ7gcSATQnyvKylBit8HpQoKQR3ojsCLBlURouUF8l 9yW3cn8Y3S4fDDoRUfJx4WU7xsox5XqnC978ArWE1dUd0MyOf37Wt4dJbKRQsA93FSX9BaPMCmnId /HLFC98w==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lRfvz-004zUL-KU; Wed, 31 Mar 2021 18:51:27 +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 Subject: [PATCH v6 11/27] mm/filemap: Add folio_next_index Date: Wed, 31 Mar 2021 19:47:12 +0100 Message-Id: <20210331184728.1188084-12-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210331184728.1188084-1-willy@infradead.org> References: <20210331184728.1188084-1-willy@infradead.org> MIME-Version: 1.0 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 1EA40E0011C4 X-Stat-Signature: tbf7kjmwfqntx4g8gq3thzo7nyn3rkrq 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: 1617216719-651778 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 --- include/linux/pagemap.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 6749c47d3c33..3aefe6558f7d 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.