linux-kernel - [PATCH] x86/mm: Assign the initail value to the pmd

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Date:	Sun, 12 Jul 2015 20:18:42 +0800
From:	Minfei Huang <mhuang@...hat.com>
To:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	akpm@...ux-foundation.org, tony.luck@...el.com,
	wangnan0@...wei.com, david.vrabel@...rix.com, yinghai@...nel.org
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Minfei Huang <mnfhuang@...il.com>
Subject: [PATCH] x86/mm: Assign the initail value to the pmd_idx

From: Minfei Huang <mnfhuang@...il.com>

The variable pmd_idx is undefined, when we try to start the loop to
calculate the page.

Assign the proper value which indexes the start address to make it work
well.

Signed-off-by: Minfei Huang <mnfhuang@...il.com>
---
 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 8340e45..68aec42 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);
-- 
2.2.2

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