common: guard iommu symbols with CONFIG_HAS_PASSTHROUGH
The variables iommu_enabled and iommu_dont_flush_iotlb are defined in
drivers/passthrough/iommu.c and are referenced in common code, which
causes the link to fail when !CONFIG_HAS_PASSTHROUGH.
Guard references to these variables in common code so that xen
builds when !CONFIG_HAS_PASSTHROUGH.
Signed-off-by: Connor Davis <connojdavis@gmail.com>
[jb: further massage xen/iommu.h adjustment] Acked-by: Jan Beulich <jbeulich@suse.com>
projects / xen.git / commit