Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753665Ab1DLLTj (ORCPT ); Tue, 12 Apr 2011 07:19:39 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:21414 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752033Ab1DLLTi (ORCPT ); Tue, 12 Apr 2011 07:19:38 -0400 X-IronPort-AV: E=Sophos;i="4.64,195,1301889600"; d="scan'208";a="144559606" From: stefano.stabellini@eu.citrix.com To: linux-kernel@vger.kernel.org Cc: xen-devel@lists.xensource.com, konrad.wilk@oracle.com, jeremy@goop.org, Stefano.Stabellini@eu.citrix.com, yinghai@kernel.org, hpa@linux.intel.com, mingo@elte.hu, Stefano Stabellini Subject: [PATCH 1/4] xen: mask_rw_pte mark RO all pagetable pages up to pgt_buf_top Date: Tue, 12 Apr 2011 12:19:49 +0100 Message-Id: <1302607192-21355-1-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: References: X-OriginalArrivalTime: 12 Apr 2011 11:19:37.0489 (UTC) FILETIME=[82348810:01CBF903] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1154 Lines: 33 From: Stefano Stabellini mask_rw_pte is currently checking if a pfn is a pagetable page if it falls in the range pgt_buf_start - pgt_buf_end but that is incorrect because pgt_buf_end is a moving target: pgt_buf_top is the real boundary. Signed-off-by: Stefano Stabellini --- arch/x86/xen/mmu.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index c82df6c..6b833db 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1491,7 +1491,7 @@ static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte) * it is RO. */ if (((!is_early_ioremap_ptep(ptep) && - pfn >= pgt_buf_start && pfn < pgt_buf_end)) || + pfn >= pgt_buf_start && pfn < pgt_buf_top)) || (is_early_ioremap_ptep(ptep) && pfn != (pgt_buf_end - 1))) pte = pte_wrprotect(pte); -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/