From patchwork Wed Dec 5 12:28:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 10714045 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EFC0A17D5 for ; Wed, 5 Dec 2018 12:32:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DD3B22CE95 for ; Wed, 5 Dec 2018 12:32:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CCFD32CE99; Wed, 5 Dec 2018 12:32:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BDC352CE95 for ; Wed, 5 Dec 2018 12:32:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=QdC4+j8tQ2Pkbqi2Ve1tHmvnZJcxVxcXc6C7T/gC7EI=; b=FAD8kC4swILg8+xD1otH7t9Oz/ AUb77DQwLPaFgsdnRJCJ2zSF0ONqWWqlFzl03kIGXq4Ul0pfcs33nvOHMZcp/rovfBCnT6Q7kRj+M +kx1P1uTCZD76ACVLw3tY9+l2hk06sY0c20LFAa5AfDUp75Ah35jxGUBuZMZWOAKy24PfxynTPL4b Yx2ok0pbecbrhVR+l4ybjXf//4O93oueTkq87WHuPuo+nZLAELcHf7nWUR8wnhGdwaSz9muK2Eawi jok6tXDui4KwyHNgxBtNiBEZWi6J/7fdKDJdveNwGqR7NKiV2fAnf/XCvq/zLaOjuwi2f7IZoRo0A GB0S/qUg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gUWLT-0004Kk-OF; Wed, 05 Dec 2018 12:32:03 +0000 Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gUWJn-00025Y-Qv; Wed, 05 Dec 2018 12:30:32 +0000 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 308583002315; Wed, 5 Dec 2018 12:30:09 +0000 (UTC) Received: from t460s.redhat.com (ovpn-117-65.ams2.redhat.com [10.36.117.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4AA5C60F89; Wed, 5 Dec 2018 12:30:06 +0000 (UTC) From: David Hildenbrand To: linux-mm@kvack.org Subject: [PATCH RFC 4/7] riscv/vdso: don't clear PG_reserved Date: Wed, 5 Dec 2018 13:28:48 +0100 Message-Id: <20181205122851.5891-5-david@redhat.com> In-Reply-To: <20181205122851.5891-1-david@redhat.com> References: <20181205122851.5891-1-david@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.43]); Wed, 05 Dec 2018 12:30:09 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181205_043020_546782_30D5C4E0 X-CRM114-Status: GOOD ( 12.39 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, Albert Ou , Andrew Morton , David Hildenbrand , Palmer Dabbelt , linux-kernel@vger.kernel.org, Matthew Wilcox , Michal Hocko , linux-m68k@lists.linux-m68k.org, linux-mediatek@lists.infradead.org, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, Tobias Klauser , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The VDSO is part of the kernel image and therefore the struct pages are marked as reserved during boot. As we install a special mapping, the actual struct pages will never be exposed to MM via the page tables. We can therefore leave the pages marked as reserved. Cc: Palmer Dabbelt Cc: Albert Ou Cc: Tobias Klauser Cc: Andrew Morton Cc: Michal Hocko Cc: Matthew Wilcox Signed-off-by: David Hildenbrand Acked-by: Palmer Dabbelt --- arch/riscv/kernel/vdso.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/riscv/kernel/vdso.c b/arch/riscv/kernel/vdso.c index 582cb153eb24..0cd044122234 100644 --- a/arch/riscv/kernel/vdso.c +++ b/arch/riscv/kernel/vdso.c @@ -54,7 +54,6 @@ static int __init vdso_init(void) struct page *pg; pg = virt_to_page(vdso_start + (i << PAGE_SHIFT)); - ClearPageReserved(pg); vdso_pagelist[i] = pg; } vdso_pagelist[i] = virt_to_page(vdso_data);