Received: by 2002:a25:868d:0:0:0:0:0 with SMTP id z13csp500866ybk; Fri, 15 May 2020 06:21:23 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwk9xw0htdAuOHiJMCZmy1mYHAUiwMSX0UheBln0qBb+629WrnpQelOlnIJJ491tXYFWZon X-Received: by 2002:a17:906:7a1c:: with SMTP id d28mr2637355ejo.10.1589548883368; Fri, 15 May 2020 06:21:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1589548883; cv=none; d=google.com; s=arc-20160816; b=YlAanrzRQkgajbdmIL2rUMSjSJctsSg5GRSR/427AvqFmsLpttKxgFPMTNmU56RNF5 JeoqXiSymr/DmXnyZTpFKEhAgj9iX+pT0riqbl/i4WLeT+RTXODEovn6esECJDJaCA31 kLdi9IsDHai2rZEfHoKS2jpGnJAXarwAULQqC1/MmJ7y1GN8rSKhwZl63bobcQ/UNT8w sTGSr4lrooueP/kjjEL3GULqm1yujWOhKeQXh7MO41XifqZAQH9JDODODkgg4wudD1Gp jfdVxCPSM5qJ9CyIZRnS4MxHE4JRsGqC6thBebgyNkvaUn4/n0ik2HiLM5KWj7GLraqE lXGw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=EpnkLjZqk1S3DSmVdcLM12MdJ2sgIE4S7yU2k8eu7Iw=; b=M4+0IjyTXXPkavcZBpBu2CltyZGC9QCMu3waU7RK02l9W7vpRIoGFHn6i06a8T6yiI +G3hYo5rsCvypjwrRvFOyd+qka3WKgrkRE16IY8ghaitxsYc55aYxrOTWuCVqmhDhj3j jywPAAfbGNDcaKQV+h/LByjL+9zllfhz212YJTzknbm2dWH57I0fYjulgjVFBmA7L9Vy sxUXQTl2RRV2+aEe1B9CvQ/u1QlCIMAxOoDh4nSwwdbj0Zu2IgO8VJXb+35EMh9t6nXy dUEHUOSVQTHhtqVOwu29nAWiR4kC3bvcf4E9ITriJUvSbUbwO8HxvZHyLqUqTt2vtPdK sshw== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=Ouac5fKO; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id co1si1077471edb.82.2020.05.15.06.21.00; Fri, 15 May 2020 06:21:23 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=Ouac5fKO; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726863AbgEONR0 (ORCPT + 99 others); Fri, 15 May 2020 09:17:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726624AbgEONRE (ORCPT ); Fri, 15 May 2020 09:17:04 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05727C05BD1F; Fri, 15 May 2020 06:17:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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=EpnkLjZqk1S3DSmVdcLM12MdJ2sgIE4S7yU2k8eu7Iw=; b=Ouac5fKOcAvAmnZMVvgIPIulHz DBYXu8tRuuU2a1+ObC+C8BwL0TvJlGyVB2yuMmX+Yt5T2jW2NDuiC1XnYHtaW2rmMH15oyeWPkVDd uWHxTwHy06J+v1q+Z7YcZmhjqG+5wkRycaYFO6Td47uoQiauEsfZWpQJH/MOutPZmGXJt7AW20Nfq NZU/AQg9di4fKaqnG3jm/1CZ4gb0IFH/WgWCC2yb1Aw8MlUVSooBh2QbM+UrqLwZ2kGNSKXsN0qO1 F/QddNe1SrlYeEjhcgOYx2ZIpQmezI0VcBi2wn45FMUyqdG8I6/gQwedLDAzNeQUhpUCoCbspc1Tb slpHaFWA==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZaD0-0005nF-Jh; Fri, 15 May 2020 13:17:02 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 30/36] mm: Support tail pages in wait_for_stable_page Date: Fri, 15 May 2020 06:16:50 -0700 Message-Id: <20200515131656.12890-31-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200515131656.12890-1-willy@infradead.org> References: <20200515131656.12890-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Matthew Wilcox (Oracle)" page->mapping is undefined for tail pages, so operate exclusively on the head page. Signed-off-by: Matthew Wilcox (Oracle) --- mm/page-writeback.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 7326b54ab728..e2da7d7e93b8 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2841,6 +2841,7 @@ EXPORT_SYMBOL_GPL(wait_on_page_writeback); */ void wait_for_stable_page(struct page *page) { + page = compound_head(page); if (bdi_cap_stable_pages_required(inode_to_bdi(page->mapping->host))) wait_on_page_writeback(page); } -- 2.26.2