From b1992df3f070475b243b12ca1241a5938ef5f9bc Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@novell.com>
Date: Fri, 19 Oct 2007 20:35:03 +0200
Subject: [PATCH] x86: honor _PAGE_PSE bit on page walks
[ tglx: arch/x86 adaptation ]
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/mm/fault_32.c | 3 ++-
arch/x86/mm/fault_64.c | 2 +-
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 6555c3d143716..c9a03f73986e9 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -564,7 +564,8 @@ no_context:
* it's allocated already.
*/
if ((page >> PAGE_SHIFT) < max_low_pfn
- && (page & _PAGE_PRESENT)) {
+ && (page & _PAGE_PRESENT)
+ && !(page & _PAGE_PSE)) {
page &= PAGE_MASK;
page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT)
& (PTRS_PER_PTE - 1)];
diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c
index a881f0796169b..1e631745ca41b 100644
--- a/arch/x86/mm/fault_64.c
+++ b/arch/x86/mm/fault_64.c
@@ -169,7 +169,7 @@ void dump_pagetable(unsigned long address)
pmd = pmd_offset(pud, address);
if (bad_address(pmd)) goto bad;
printk("PMD %lx ", pmd_val(*pmd));
- if (!pmd_present(*pmd)) goto ret;
+ if (!pmd_present(*pmd) || pmd_large(*pmd)) goto ret;
pte = pte_offset_kernel(pmd, address);
if (bad_address(pte)) goto bad;
--
2.30.2