diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index fc505a84aa93..c986e32b5a48 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -154,7 +154,6 @@ static inline int apic_force_enable(unsigned long addr)
 extern int apic_force_enable(unsigned long addr);
 #endif
 
-extern void apic_bsp_setup(bool upmode);
 extern void apic_ap_setup(void);
 
 /*
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 93de7862eef8..dc4ed655dbbb 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1350,6 +1350,8 @@ void __init init_bsp_APIC(void)
 	apic_write(APIC_LVT1, value);
 }
 
+static void __init apic_bsp_setup(bool upmode);
+
 /* Init the interrupt delivery mode for the BSP */
 void __init apic_intr_mode_init(void)
 {
@@ -2414,11 +2416,8 @@ static void __init apic_bsp_up_setup(void)
 /**
  * apic_bsp_setup - Setup function for local apic and io-apic
  * @upmode:		Force UP mode (for APIC_init_uniprocessor)
- *
- * Returns:
- * apic_id of BSP APIC
  */
-void __init apic_bsp_setup(bool upmode)
+static void __init apic_bsp_setup(bool upmode)
 {
 	connect_bsp_APIC();
 	if (upmode)