diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index c282bdec1650e076796053758487640a052e89bc..134dea10324726d8c9f7d46b45ae3697bf5da070 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -25,6 +25,7 @@
 #include <asm/proto.h>
 #include <asm/gart.h>
 #include <asm/amd_iommu_types.h>
+#include <asm/amd_iommu.h>
 
 #define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28))
 
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index ec6f13b69d53cb8914d0bd8baaab11c1ef491e5f..bae4a76a3b545449177c1b639c3c9dd89f683d8b 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -23,6 +23,7 @@
 #include <linux/list.h>
 #include <asm/pci-direct.h>
 #include <asm/amd_iommu_types.h>
+#include <asm/amd_iommu.h>
 #include <asm/gart.h>
 
 /*
diff --git a/include/asm-x86/amd_iommu.h b/include/asm-x86/amd_iommu.h
new file mode 100644
index 0000000000000000000000000000000000000000..30a12049353b1bc6c17d9811046f71096b9d6759
--- /dev/null
+++ b/include/asm-x86/amd_iommu.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
+ * Author: Joerg Roedel <joerg.roedel@amd.com>
+ *         Leo Duran <leo.duran@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#ifndef _ASM_X86_AMD_IOMMU_H
+#define _ASM_X86_AMD_IOMMU_H
+
+#ifdef CONFIG_AMD_IOMMU
+extern int amd_iommu_init(void);
+extern int amd_iommu_init_dma_ops(void);
+extern void amd_iommu_detect(void);
+#else
+static inline int amd_iommu_init(void) { return -ENODEV; }
+static inline void amd_iommu_detect(void) { }
+#endif
+
+#endif