iommu: Cleanup ifdefs in detect_intel_iommu()

Signed-off-by: Suresh Siddha <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
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Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Ingo Molnar <[e-mail]>

arch/ia64/include/asm/iommu.h

···
 
 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 force_iommu, no_iommu;
 extern int iommu_pass_through;
+extern int iommu_detected;
 #else
 #define iommu_pass_through	(0)
+#define no_iommu		(1)
+#define iommu_detected		(0)
 #endif
 extern void iommu_dma_init(void);
 extern void machvec_init(const char *name);

drivers/iommu/dmar.c

···
 	if (ret)
 		ret = check_zero_address();
 	{
-#ifdef CONFIG_INTR_REMAP
 		struct acpi_table_dmar *dmar;
 
 		dmar = (struct acpi_table_dmar *) dmar_tbl;
-		if (ret && cpu_has_x2apic && dmar->flags & 0x1)
+
+		if (ret && intr_remapping_enabled && cpu_has_x2apic &&
+		    dmar->flags & 0x1)
 			printk(KERN_INFO
-			       "Queued invalidation will be enabled to support "
-			       "x2apic and Intr-remapping.\n");
-#endif
-#ifdef CONFIG_DMAR
+			       "Queued invalidation will be enabled to support x2apic and Intr-remapping.\n");
+
 		if (ret && !no_iommu && !iommu_detected && !dmar_disabled) {
 			iommu_detected = 1;
 			/* Make sure ACS will be enabled */
 			pci_request_acs();
 		}
-#endif
+
 #ifdef CONFIG_X86
 		if (ret)
 			x86_init.iommu.iommu_init = intel_iommu_init;

include/linux/dma_remapping.h

···
 extern void free_dmar_iommu(struct intel_iommu *iommu);
 extern int iommu_calculate_agaw(struct intel_iommu *iommu);
 extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
+extern int dmar_disabled;
 #else
 static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
 {
···
 static inline void free_dmar_iommu(struct intel_iommu *iommu)
 {
 }
+#define dmar_disabled	(1)
 #endif
 
-extern int dmar_disabled;
 
 #endif