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=-8.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 10438C49EA5 for ; Thu, 24 Jun 2021 15:12:47 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C8D69613DC for ; Thu, 24 Jun 2021 15:12:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C8D69613DC 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 B4A536B0036; Thu, 24 Jun 2021 11:12:45 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AFA926B005D; Thu, 24 Jun 2021 11:12:45 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 973486B006C; Thu, 24 Jun 2021 11:12:45 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0077.hostedemail.com [216.40.44.77]) by kanga.kvack.org (Postfix) with ESMTP id 58DEA6B0036 for ; Thu, 24 Jun 2021 11:12:45 -0400 (EDT) Received: from smtpin32.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 64A071E067 for ; Thu, 24 Jun 2021 15:12:45 +0000 (UTC) X-FDA: 78288959490.32.498C52C Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf16.hostedemail.com (Postfix) with ESMTP id A54D68019364 for ; Thu, 24 Jun 2021 15:12:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=OX+lANPiZGvxTlDQ96tEYd1zyjA1DvX076Imm4QeeNY=; b=if2/Xho/z/d98VtoDncnYkqWbb 12naERzdbyXq3MXtuFRNqloUyIy4xhAidr1ZQQr+3ArrKrYlwqP8rlNGYOf/fuxIYBc09awxNef3p u3d0hEJMcVObM85Uel/TSl+J9mwl5jaSzIXey4c/vFVluWKzZW5id6qT6spcDLwsf/kJiQdC+OvH6 ub260sxVgEv93k419eSdK+Y3Zm6FIqBWsQKWLDyE7us7Z5mW6xpdhYVOlwrFXFlxlkWZisYtNS10X GAu9r2+68361gE4GFQX2Y7zQPbY0kpXzwKnDlPbI7zcT8M9fS/6G9LkXrfwEgFQea2Tdl1uZNzAtx 19iAJMzg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1lwR1R-00GhlE-IM; Thu, 24 Jun 2021 15:12:08 +0000 Date: Thu, 24 Jun 2021 16:12:05 +0100 From: Matthew Wilcox To: Christoph Hellwig Cc: akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 01/46] mm: Add folio_to_pfn() Message-ID: References: <20210622121551.3398730-1-willy@infradead.org> <20210622121551.3398730-2-willy@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: A54D68019364 Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b="if2/Xho/"; spf=none (imf16.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: gqysnum8ykwftsrepn497fue4wbbmauw X-HE-Tag: 1624547563-599473 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: On Wed, Jun 23, 2021 at 08:49:55AM +0100, Christoph Hellwig wrote: > On Tue, Jun 22, 2021 at 01:15:06PM +0100, Matthew Wilcox (Oracle) wrote: > > The pfn of a folio is the pfn of its head page. > > > > Signed-off-by: Matthew Wilcox (Oracle) > > Maybe add a kerneldoc comment stating that? /** * folio_to_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. */