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-rw-r--r--arch/x86/include/asm/mpspec.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index 5de8e92be2dc..e3c579efde7a 100644
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -64,12 +64,18 @@ extern void early_reserve_e820_mpc_new(void);
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);
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