diff --git a/arch/i386/kernel/cpu/mtrr/Makefile b/arch/i386/kernel/cpu/mtrr/Makefile
index a25b701ab84e..191fc0533649 100644
--- a/arch/i386/kernel/cpu/mtrr/Makefile
+++ b/arch/i386/kernel/cpu/mtrr/Makefile
@@ -1,5 +1,3 @@
 obj-y		:= main.o if.o generic.o state.o
-obj-y		+= amd.o
-obj-y		+= cyrix.o
-obj-y		+= centaur.o
+obj-$(CONFIG_X86_32) += amd.o cyrix.o centaur.o
 
diff --git a/arch/i386/kernel/cpu/mtrr/main.c b/arch/i386/kernel/cpu/mtrr/main.c
index 2b8b0b361ccb..a4de30b9d3d3 100644
--- a/arch/i386/kernel/cpu/mtrr/main.c
+++ b/arch/i386/kernel/cpu/mtrr/main.c
@@ -59,7 +59,11 @@ struct mtrr_ops * mtrr_if = NULL;
 static void set_mtrr(unsigned int reg, unsigned long base,
 		     unsigned long size, mtrr_type type);
 
+#ifndef CONFIG_X86_64
 extern int arr3_protected;
+#else
+#define arr3_protected 0
+#endif
 
 void set_mtrr_ops(struct mtrr_ops * ops)
 {
@@ -544,9 +548,11 @@ extern void centaur_init_mtrr(void);
 
 static void __init init_ifs(void)
 {
+#ifndef CONFIG_X86_64
 	amd_init_mtrr();
 	cyrix_init_mtrr();
 	centaur_init_mtrr();
+#endif
 }
 
 /* The suspend/resume methods are only for CPU without MTRR. CPU using generic