diff -ur linux-2.6.16.9/arch/x86_64/kernel/pci-gart.c linux-2.6.16.9-ndt/arch/x86_64/kernel/pci-gart.c
--- linux-2.6.16.9/arch/x86_64/kernel/pci-gart.c	2006-04-19 07:10:14.000000000 +0100
+++ linux-2.6.16.9-ndt/arch/x86_64/kernel/pci-gart.c	2006-04-24 15:53:33.000000000 +0100
@@ -114,10 +114,6 @@
 static void free_iommu(unsigned long offset, int size)
 { 
 	unsigned long flags;
-	if (size == 1) { 
-		clear_bit(offset, iommu_gart_bitmap); 
-		return;
-	}
 	spin_lock_irqsave(&iommu_bitmap_lock, flags);
 	__clear_bit_string(iommu_gart_bitmap, offset, size);
 	spin_unlock_irqrestore(&iommu_bitmap_lock, flags);