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intel-iommu: Fix one last ia64 build problem in Pass Through Support 

On ia64 with CONFIG_DMAR=n and CONFIG_SWIOTLB=y (as used in
arch/ia64/configs/tiger_defconfig) there is still a link
error with iommu_pass_through listed as an undefined symbol:

arch/ia64/kernel/built-in.o: In function `pci_swiotlb_init':
(.init.text+0x7f70): undefined reference to `iommu_pass_through'

Fix it by #defining iommu_pass_through away in asm/iommu.h

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Luck, Tony 2009-05-26 15:45:12 -07:00 committed by David Woodhouse
parent 93a23a7271
commit 008fe148cb
1 changed files with 4 additions and 0 deletions
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4
arch/ia64/include/asm/iommu.h
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@ -9,7 +9,11 @@ extern void pci_iommu_shutdown(void);
extern void no_iommu_init(void);
extern int force_iommu, no_iommu;
extern int iommu_detected;
#ifdef CONFIG_DMAR
extern int iommu_pass_through;
#else
#define iommu_pass_through (0)
#endif
extern void iommu_dma_init(void);
extern void machvec_init(const char *name);