--- linux-2.6.5-gentoo/arch/x86_64/kernel/io_apic.c.dist	2004-04-09 17:18:36.000000000 +0100
+++ linux-2.6.5-gentoo/arch/x86_64/kernel/io_apic.c	2004-04-10 15:32:26.380122435 +0100
@@ -250,12 +250,14 @@
 				vendor &= 0xffff;
 				switch (vendor) { 
 				case PCI_VENDOR_ID_VIA:
+#ifdef CONFIG_GART_IOMMU
 					if (end_pfn >= (0xffffffff>>PAGE_SHIFT) &&
 					    !iommu_aperture_allowed) { 
 						printk(KERN_INFO
     "Looks like a VIA chipset. Disabling IOMMU. Overwrite with \"iommu=allowed\"\n"); 
 						iommu_aperture_disabled = 1; 
 					} 
+#endif
 					/* FALL THROUGH */
 				case PCI_VENDOR_ID_NVIDIA:
 #ifndef CONFIG_SMP