diff --git a/arch/x86/include/asm/amd_iommu.h b/arch/x86/include/asm/amd_iommu.h
index 4b18089..3604669 100644
--- a/arch/x86/include/asm/amd_iommu.h
+++ b/arch/x86/include/asm/amd_iommu.h
@@ -30,12 +30,10 @@
 extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
 extern void amd_iommu_flush_all_domains(void);
 extern void amd_iommu_flush_all_devices(void);
-extern void amd_iommu_shutdown(void);
 extern void amd_iommu_apply_erratum_63(u16 devid);
 #else
 static inline int amd_iommu_init(void) { return -ENODEV; }
 static inline void amd_iommu_detect(void) { }
-static inline void amd_iommu_shutdown(void) { }
 #endif
 
 #endif /* _ASM_X86_AMD_IOMMU_H */
diff --git a/arch/x86/include/asm/gart.h b/arch/x86/include/asm/gart.h
index 6cfdafa..4fdd5b3 100644
--- a/arch/x86/include/asm/gart.h
+++ b/arch/x86/include/asm/gart.h
@@ -36,7 +36,6 @@
 
 extern void early_gart_iommu_check(void);
 extern void gart_iommu_init(void);
-extern void gart_iommu_shutdown(void);
 extern void __init gart_parse_options(char *);
 extern void gart_iommu_hole_init(void);
 
@@ -51,9 +50,6 @@
 static inline void gart_iommu_init(void)
 {
 }
-static inline void gart_iommu_shutdown(void)
-{
-}
 static inline void gart_parse_options(char *options)
 {
 }
diff --git a/arch/x86/include/asm/iommu.h b/arch/x86/include/asm/iommu.h
index fd6d21b..878b307 100644
--- a/arch/x86/include/asm/iommu.h
+++ b/arch/x86/include/asm/iommu.h
@@ -1,7 +1,7 @@
 #ifndef _ASM_X86_IOMMU_H
 #define _ASM_X86_IOMMU_H
 
-extern void pci_iommu_shutdown(void);
+static inline void iommu_shutdown_noop(void) {}
 extern void no_iommu_init(void);
 extern struct dma_map_ops nommu_dma_ops;
 extern int force_iommu, no_iommu;
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 2c756fd..66008ed 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -121,6 +121,7 @@
 	unsigned long (*calibrate_tsc)(void);
 	unsigned long (*get_wallclock)(void);
 	int (*set_wallclock)(unsigned long nowtime);
+	void (*iommu_shutdown)(void);
 };
 
 extern struct x86_init_ops x86_init;