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-rw-r--r--include/asm-x86/smp.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
index c0d693ca4357..b35566264879 100644
--- a/include/asm-x86/smp.h
+++ b/include/asm-x86/smp.h
@@ -174,10 +174,15 @@ static inline int logical_smp_processor_id(void)
return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
}
+#ifdef CONFIG_X86_32_SMP
static inline unsigned int read_apic_id(void)
{
return *(u32 *)(APIC_BASE + APIC_ID);
}
+#else
+extern unsigned int read_apic_id(void);
+#endif
+
# ifdef APIC_DEFINITION
extern int hard_smp_processor_id(void);
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