diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index 5de8e92..e3c579e 100644
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -64,12 +64,18 @@
 extern int enable_update_mptable;
 extern int default_mpc_apic_id(struct mpc_cpu *m);
 extern void default_smp_read_mpc_oem(struct mpc_table *mpc);
+# ifdef CONFIG_X86_IO_APIC
+extern void default_mpc_oem_bus_info(struct mpc_bus *m, char *str);
+# else
+#  define default_mpc_oem_bus_info NULL
+# endif
 #else
 static inline void find_smp_config(void) { }
 static inline void early_reserve_e820_mpc_new(void) { }
 #define enable_update_mptable 0
 #define default_mpc_apic_id NULL
 #define default_smp_read_mpc_oem NULL
+#define default_mpc_oem_bus_info NULL
 #endif
 
 void __cpuinit generic_processor_info(int apicid, int version);
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index fd2267b..6121a8a 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -12,7 +12,6 @@
 /*
  * Any setup quirks to be performed?
  */
-struct mpc_bus;
 
 struct x86_quirks {
 	int (*arch_pre_time_init)(void);
@@ -22,8 +21,6 @@
 	int (*arch_trap_init)(void);
 	int (*mach_get_smp_config)(unsigned int early);
 	int (*mach_find_smp_config)(unsigned int reserve);
-
-	void (*mpc_oem_bus_info)(struct mpc_bus *m, char *name);
 };
 
 extern void x86_quirk_intr_init(void);
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 404e2d2..2833a87 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -12,6 +12,7 @@
  * @mpc_apic_id:		platform specific mpc apic id assignment
  * @smp_read_mpc_oem:		platform specific oem mpc table setup
  * @mpc_oem_pci_bus:		platform specific pci bus setup (default NULL)
+ * @mpc_oem_bus_info:		platform specific mpc bus info
  */
 struct x86_init_mpparse {
 	void (*mpc_record)(unsigned int mode);
@@ -19,6 +20,7 @@
 	int (*mpc_apic_id)(struct mpc_cpu *m);
 	void (*smp_read_mpc_oem)(struct mpc_table *mpc);
 	void (*mpc_oem_pci_bus)(struct mpc_bus *m);
+	void (*mpc_oem_bus_info)(struct mpc_bus *m, char *name);
 };
 
 /**
diff --git a/arch/x86/kernel/apic/numaq_32.c b/arch/x86/kernel/apic/numaq_32.c
index feebe8e..700273d 100644
--- a/arch/x86/kernel/apic/numaq_32.c
+++ b/arch/x86/kernel/apic/numaq_32.c
@@ -270,7 +270,6 @@
 	.arch_trap_init			= NULL,
 	.mach_get_smp_config		= NULL,
 	.mach_find_smp_config		= NULL,
-	.mpc_oem_bus_info		= mpc_oem_bus_info,
 };
 
 static __init void early_check_numaq(void)
@@ -293,6 +292,7 @@
 		x86_init.mpparse.mpc_apic_id = mpc_apic_id;
 		x86_init.mpparse.smp_read_mpc_oem = smp_read_mpc_oem;
 		x86_init.mpparse.mpc_oem_pci_bus = mpc_oem_pci_bus;
+		x86_init.mpparse.mpc_oem_bus_info = mpc_oem_bus_info;
 	}
 }
 
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 72e1140..a42f23f 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -72,16 +72,18 @@
 }
 
 #ifdef CONFIG_X86_IO_APIC
+void __init default_mpc_oem_bus_info(struct mpc_bus *m, char *str)
+{
+	memcpy(str, m->bustype, 6);
+	str[6] = 0;
+	apic_printk(APIC_VERBOSE, "Bus #%d is %s\n", m->busid, str);
+}
+
 static void __init MP_bus_info(struct mpc_bus *m)
 {
 	char str[7];
-	memcpy(str, m->bustype, 6);
-	str[6] = 0;
 
-	if (x86_quirks->mpc_oem_bus_info)
-		x86_quirks->mpc_oem_bus_info(m, str);
-	else
-		apic_printk(APIC_VERBOSE, "Bus #%d is %s\n", m->busid, str);
+	x86_init.mpparse.mpc_oem_bus_info(m, str);
 
 #if MAX_MP_BUSSES < 256
 	if (m->busid >= MAX_MP_BUSSES) {
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index fb5d93c..27685ed 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -31,5 +31,6 @@
 		.setup_ioapic_ids	= x86_init_noop,
 		.mpc_apic_id		= default_mpc_apic_id,
 		.smp_read_mpc_oem	= default_smp_read_mpc_oem,
+		.mpc_oem_bus_info	= default_mpc_oem_bus_info,
 	},
 };