From 32b23e9a7331fce57eb0af52e19e8409fdef831b Mon Sep 17 00:00:00 2001
From: Yinghai Lu <yhlu.kernel@gmail.com>
Date: Sun, 13 Jul 2008 14:29:41 -0700
Subject: x86: max_low_pfn_mapped fix #4

only add direct mapping for aperture

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 arch/x86/kernel/pci-gart_64.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index a614ee10f846..c3fe78406d18 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -679,11 +679,8 @@ static __init int init_k8_gatt(struct agp_kern_info *info)
 	/* need to map that range */
 	end_pfn = (aper_base>>PAGE_SHIFT) + (aper_size>>PAGE_SHIFT);
 	if (end_pfn > max_low_pfn_mapped) {
-		start_pfn = max_low_pfn_mapped;
-		max_low_pfn_mapped = init_memory_mapping(start_pfn<<PAGE_SHIFT,
-							 end_pfn<<PAGE_SHIFT);
-		if (max_pfn_mapped < max_low_pfn_mapped)
-			max_pfn_mapped = max_low_pfn_mapped;
+		start_pfn = (aper_base>>PAGE_SHIFT);
+		init_memory_mapping(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
 	}
 	return 0;
 
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