From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:55449 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754197AbbIZU5U (ORCPT ); Sat, 26 Sep 2015 16:57:20 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Minfei Huang , tony.luck@intel.com, wangnan0@huawei.com, david.vrabel@citrix.com, yinghai@kernel.org, Thomas Gleixner Subject: [PATCH 4.2 063/134] x86/mm: Initialize pmd_idx in page_table_range_init_count() Date: Sat, 26 Sep 2015 13:55:15 -0700 Message-Id: <20150926205315.620836773@linuxfoundation.org> In-Reply-To: <20150926205311.819185658@linuxfoundation.org> References: <20150926205311.819185658@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: stable-owner@vger.kernel.org List-ID: 4.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Minfei Huang commit 9962eea9e55f797f05f20ba6448929cab2a9f018 upstream. The variable pmd_idx is not initialized for the first iteration of the for loop. Assign the proper value which indexes the start address. Fixes: 719272c45b82 'x86, mm: only call early_ioremap_page_table_range_init() once' Signed-off-by: Minfei Huang Cc: tony.luck@intel.com Cc: wangnan0@huawei.com Cc: david.vrabel@citrix.com Reviewed-by: yinghai@kernel.org Link: http://lkml.kernel.org/r/1436703522-29552-1-git-send-email-mhuang@redhat.com Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman --- arch/x86/mm/init_32.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -137,6 +137,7 @@ page_table_range_init_count(unsigned lon vaddr = start; pgd_idx = pgd_index(vaddr); + pmd_idx = pmd_index(vaddr); for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd_idx++) { for (; (pmd_idx < PTRS_PER_PMD) && (vaddr != end);