From patchwork Tue Jun 22 11:41:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12336981 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,SPF_PASS,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 0FE82C2B9F4 for ; Tue, 22 Jun 2021 11:55:52 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B89976100A for ; Tue, 22 Jun 2021 11:55:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B89976100A 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 5AED96B0062; Tue, 22 Jun 2021 07:55:51 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5911D6B006C; Tue, 22 Jun 2021 07:55:51 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 44E7D6B0070; Tue, 22 Jun 2021 07:55:51 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0106.hostedemail.com [216.40.44.106]) by kanga.kvack.org (Postfix) with ESMTP id 817976B0062 for ; Tue, 22 Jun 2021 07:55:50 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 2AB6D8249980 for ; Tue, 22 Jun 2021 11:55:50 +0000 (UTC) X-FDA: 78281205660.13.024EABD Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf17.hostedemail.com (Postfix) with ESMTP id C34BC4006F14 for ; Tue, 22 Jun 2021 11:55:49 +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=4SCmFvTMz8WbZWeYFg3RyglQ4RfNbDDyDvk/e/7SgLw=; b=XZV1Z48ASOEziv5nMwSHUoIRXe ROMS05B8jhm1xw8QaFlbyrIGFWOEeD43gBYroM9HoCJpS7s+rDfIJzmYkG3t497P54C1ohgVde2qx hzWs8lKz0F+ZkJtUlmZEwJBCkPTaIYB8aRiGrwRTadECnfHcLg4f6g5xInPaBDVy+21rGtZe5uFOj WX4FVmnC685Qbsi/OB/2iDRKEYaFR3PUzRnIK9gegMryHScbOqAop4XueH5P9joWyGWttCaY+XYEG rQnOiyryQVNCZxM/PeyWQZNbRFO3kMZKwCjt7h6tgEC617cznBs/gg6DfA1dNYb9Hr3VAg5jQTPht 92m5v9LQ==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1lvey9-00EEL2-KA; Tue, 22 Jun 2021 11:53:43 +0000 From: "Matthew Wilcox (Oracle)" To: akpm@linux-foundation.org Cc: "Matthew Wilcox (Oracle)" , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Christoph Hellwig , Jeff Layton , "Kirill A . Shutemov" , Vlastimil Babka , William Kucharski , David Howells Subject: [PATCH v12 15/33] mm/filemap: Add folio_pos() and folio_file_pos() Date: Tue, 22 Jun 2021 12:41:00 +0100 Message-Id: <20210622114118.3388190-16-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210622114118.3388190-1-willy@infradead.org> References: <20210622114118.3388190-1-willy@infradead.org> MIME-Version: 1.0 X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: C34BC4006F14 Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=XZV1Z48A; spf=none (imf17.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-Stat-Signature: mw17mr7hbn33j5gjgnzm317beks4cqma X-HE-Tag: 1624362949-760916 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: These are just wrappers around page_offset() and page_file_offset() respectively. No change to generated code. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Acked-by: Jeff Layton Acked-by: Kirill A. Shutemov Acked-by: Vlastimil Babka Reviewed-by: William Kucharski Reviewed-by: David Howells --- include/linux/pagemap.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 4b3ce5f76a7b..d073589b7be2 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -561,6 +561,27 @@ static inline loff_t page_file_offset(struct page *page) return ((loff_t)page_index(page)) << PAGE_SHIFT; } +/** + * folio_pos - Returns the byte position of this folio in its file. + * @folio: The folio. + */ +static inline loff_t folio_pos(struct folio *folio) +{ + return page_offset(&folio->page); +} + +/** + * folio_file_pos - Returns the byte position of this folio in its file. + * @folio: The folio. + * + * This differs from folio_pos() for folios which belong to a swap file. + * NFS is the only filesystem today which needs to use folio_file_pos(). + */ +static inline loff_t folio_file_pos(struct folio *folio) +{ + return page_file_offset(&folio->page); +} + extern pgoff_t linear_hugepage_index(struct vm_area_struct *vma, unsigned long address);