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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D5F2C433EF for ; Sat, 29 Jan 2022 21:41:09 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id ACD0C6B007E; Sat, 29 Jan 2022 16:41:08 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A7C6C6B0080; Sat, 29 Jan 2022 16:41:08 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 96B496B0081; Sat, 29 Jan 2022 16:41:08 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0234.hostedemail.com [216.40.44.234]) by kanga.kvack.org (Postfix) with ESMTP id 882BF6B007E for ; Sat, 29 Jan 2022 16:41:08 -0500 (EST) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 3F18F972E4 for ; Sat, 29 Jan 2022 21:41:08 +0000 (UTC) X-FDA: 79084645416.05.E39A5A7 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf27.hostedemail.com (Postfix) with ESMTP id CD13740002 for ; Sat, 29 Jan 2022 21:41:07 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B619FB82817; Sat, 29 Jan 2022 21:41:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32A97C340E5; Sat, 29 Jan 2022 21:41:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1643492465; bh=qEIr/IPucsKWv1MDGWAxkAVSGCf1AA6mpXIOsHuBXkk=; h=Date:From:To:Subject:In-Reply-To:From; b=Rl+5taXV6QT0gqwmYnP6xujVRE4hEEYrETUDdNOKf5+e/h64I8t8TPev1Eu2SoTzI LGKHcgT5Os5tE52Vkz8m0yuf3EajP7dWj7tw9rTsQwKYYADCZu5pdGFbEuf1JW+aNV jj6mOnsDMUhEuSv4ghB8uWvLJS/W5aAwcLfrGUN4= Date: Sat, 29 Jan 2022 13:41:04 -0800 From: Andrew Morton To: akpm@linux-foundation.org, linux-mm@kvack.org, mm-commits@vger.kernel.org, richard.weiyang@gmail.com, torvalds@linux-foundation.org, willy@infradead.org Subject: [patch 05/12] mm: page->mapping folio->mapping should have the same offset Message-ID: <20220129214104.3DnS3zSIS%akpm@linux-foundation.org> In-Reply-To: <20220129134026.8ccf701012f26eb2c2c269c9@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Queue-Id: CD13740002 X-Rspam-User: nil Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=Rl+5taXV; dmarc=none; spf=pass (imf27.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org X-Stat-Signature: 3oweogzgmqpfcsuuguyf6iu3sh771js7 X-Rspamd-Server: rspam08 X-HE-Tag: 1643492467-149715 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Wei Yang Subject: mm: page->mapping folio->mapping should have the same offset As with the other members of folio, the offset of page->mapping and folio->mapping must be the same. The compile-time check was inadvertently removed during development. Add it back. [willy@infradead.org: changelog redo] Link: https://lkml.kernel.org/r/20220104011734.21714-1-richard.weiyang@gmail.com Signed-off-by: Wei Yang Reviewed-by: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton --- include/linux/mm_types.h | 1 + 1 file changed, 1 insertion(+) --- a/include/linux/mm_types.h~mm-page-mapping-folio-mapping-should-have-the-same-offset +++ a/include/linux/mm_types.h @@ -261,6 +261,7 @@ static_assert(sizeof(struct page) == siz static_assert(offsetof(struct page, pg) == offsetof(struct folio, fl)) FOLIO_MATCH(flags, flags); FOLIO_MATCH(lru, lru); +FOLIO_MATCH(mapping, mapping); FOLIO_MATCH(compound_head, lru); FOLIO_MATCH(index, index); FOLIO_MATCH(private, private); _