[MICROPATCH] Make x86_64 build work without GART_IOMMU

[Jonathan Corbet]

If you try to build a 2.6.6-rc3 kernel with CONFIG_GART_IOMMU turned off,
the link fails because bad_dma_address is undefined.  This little hack just
defines the variable in pci-nommu.c as well.  It may not be an optimal fix,
but it does make the kernel build.

Why do I care?  My Radeon 9200SE goes nuts if I build a GART-enabled
kernel.  Haven't figured out why...

jon

--- 2.6.6-rc3-slab/arch/x86_64/kernel/pci-nommu.c.orig	2004-02-06 00:51:20.000000000 -0700
+++ 2.6.6-rc3-slab/arch/x86_64/kernel/pci-nommu.c	2004-04-30 13:40:35.000000000 -0600
@@ -5,6 +5,7 @@
 #include <asm/proto.h>
 
 int iommu_merge = 0;
+dma_addr_t bad_dma_address;
 
 /* 
  * Dummy IO MMU functions
-
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