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SubjectRe: [PATCH] agp: iommu_gfx_mapped only available if CONFIG_INTEL_IOMMU is set
On Fri, Oct 28, 2011 at 6:56 PM, Keith Packard <> wrote:
> Kernels with no iommu support cannot ever need the Ironlake
> work-around, so never enable it in that case.
> Might be better to completely remove the work-around from the kernel
> in this case?

While I'm not offended by this patch, I am offended by the

extern int intel_iommu_gfx_mapped;

introduced in the previous patches, I dislike having extern
declarations in a C file, a header file is the place for that sort of

Also have a look around some other places that do CONFIG_ stuff, I
think there may be examples of both in which case this approach is
fine, but I do remember there being a fair few,

#define function do while(0)


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