linux-kernel - [tip:x86/mm] x86/mm: Initialize pmd_idx in page_table_range_init

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Message-ID: <tip-9962eea9e55f797f05f20ba6448929cab2a9f018@git.kernel.org>
Date:	Mon, 20 Jul 2015 14:18:35 -0700
From:	tip-bot for Minfei Huang <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, mnfhuang@...il.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, mingo@...nel.org
Subject: [tip:x86/mm] x86/mm:
  Initialize pmd_idx in page_table_range_init_count()

Commit-ID:  9962eea9e55f797f05f20ba6448929cab2a9f018
Gitweb:     http://git.kernel.org/tip/9962eea9e55f797f05f20ba6448929cab2a9f018
Author:     Minfei Huang <mnfhuang@...il.com>
AuthorDate: Sun, 12 Jul 2015 20:18:42 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 20 Jul 2015 23:14:47 +0200

x86/mm: Initialize pmd_idx in page_table_range_init_count()

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 <mnfhuang@...il.com>
Cc: tony.luck@...el.com
Cc: wangnan0@...wei.com
Cc: david.vrabel@...rix.com
Reviewed-by: yinghai@...nel.org
Link: http://lkml.kernel.org/r/1436703522-29552-1-git-send-email-mhuang@redhat.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/mm/init_32.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index c8140e1..c23ab1e 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -137,6 +137,7 @@ page_table_range_init_count(unsigned long start, unsigned long end)
 
 	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);
--
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