Re: [GIT *] iommu fixes for 2.6.28

[Ingo Molnar]

> hm, i just updated to v2.6.28-rc1, and these changes broke the x86 
> 32-bit build:
> 
>   arch/x86/kernel/built-in.o: In function `dma_supported':
>   (.text+0x5797): undefined reference to `forbid_dac'
>   arch/x86/kernel/built-in.o: In function `iommu_setup':
>   pci-dma.c:(.init.text+0x326c): undefined reference to `forbid_dac'

i've applied the fix below to tip/x86/urgent.

	Ingo

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