From patchwork Mon Jul 12 03:05:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12369813 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,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 4DB22C07E99 for ; Mon, 12 Jul 2021 03:35:18 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 04DFB610CC for ; Mon, 12 Jul 2021 03:35:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 04DFB610CC 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 2A8FD6B0095; Sun, 11 Jul 2021 23:35:18 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 27F8E6B0098; Sun, 11 Jul 2021 23:35:18 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 147766B0099; Sun, 11 Jul 2021 23:35:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0122.hostedemail.com [216.40.44.122]) by kanga.kvack.org (Postfix) with ESMTP id E769B6B0095 for ; Sun, 11 Jul 2021 23:35:17 -0400 (EDT) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 16036182EE02D for ; Mon, 12 Jul 2021 03:35:17 +0000 (UTC) X-FDA: 78352520274.02.46B707D Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf19.hostedemail.com (Postfix) with ESMTP id C2897B00019A for ; Mon, 12 Jul 2021 03:35:16 +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=g0f91Ce67VZVh40hHvyvzcG6kDKC8un4MCAd5032QwE=; b=bf2gNa1a+p3VR9tVRebBDYrogN FlcM7GbpaGowPayjE3ffHDh4FcAF6thqVaBS4/FrnJHP6DW4RJ0LQN2Wk1wlkPdMe0L92PYklMdp3 G2lnhvf2jzfnj5KIgdKvl9GoZU9OrIWoxw0CzCzBQ8miApIxUsOPF2U1GbiZVyMFDEpbVIt29rTvb YphmcgZDQMePpJcoSCQCKcE1BKySHzGE1AVCN0AJ8YfDRwskX6oCbgh9pGNzXHfeotZ70HgaWeHIw 6C4oxHuW2SgH5ok+l8hG5zGzQWtbL7iC98qLuoKj8LBbWaKsM8a6dqcaGi1gmzYlKDOlmK5iNGcPR 8K4BfqCg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m2mhw-00GogS-IR; Mon, 12 Jul 2021 03:34:21 +0000 From: "Matthew Wilcox (Oracle)" To: linux-kernel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v13 051/137] mm: Add folio_pfn() Date: Mon, 12 Jul 2021 04:05:35 +0100 Message-Id: <20210712030701.4000097-52-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210712030701.4000097-1-willy@infradead.org> References: <20210712030701.4000097-1-willy@infradead.org> MIME-Version: 1.0 X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: C2897B00019A X-Stat-Signature: cs4skd6zpz1ps1mpnb61sqhm4qc1zmme Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=bf2gNa1a; spf=none (imf19.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-HE-Tag: 1626060916-307265 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 is the folio equivalent of page_to_pfn(). Signed-off-by: Matthew Wilcox (Oracle) --- include/linux/mm.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 80f27eb151ba..fa5974870660 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1622,6 +1622,20 @@ static inline unsigned long page_to_section(const struct page *page) } #endif +/** + * folio_pfn - Return the Page Frame Number of a folio. + * @folio: The folio. + * + * A folio may contain multiple pages. The pages have consecutive + * Page Frame Numbers. + * + * Return: The Page Frame Number of the first page in the folio. + */ +static inline unsigned long folio_pfn(struct folio *folio) +{ + return page_to_pfn(&folio->page); +} + /* MIGRATE_CMA and ZONE_MOVABLE do not allow pin pages */ #ifdef CONFIG_MIGRATION static inline bool is_pinnable_page(struct page *page)