diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index 2b7cc5397f80..ab45a220fac4 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -127,14 +127,12 @@ static inline unsigned int x86_cpuid_family(void)
 }
 
 #ifdef CONFIG_MICROCODE
-int __init microcode_init(void);
 extern void __init load_ucode_bsp(void);
 extern void load_ucode_ap(void);
 void reload_early_microcode(void);
 extern bool get_builtin_firmware(struct cpio_data *cd, const char *name);
 extern bool initrd_gone;
 #else
-static inline int __init microcode_init(void)			{ return 0; };
 static inline void __init load_ucode_bsp(void)			{ }
 static inline void load_ucode_ap(void)				{ }
 static inline void reload_early_microcode(void)			{ }
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index ec6f0415bc6d..b935e1b5f115 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -830,7 +830,7 @@ static const struct attribute_group cpu_root_microcode_group = {
 	.attrs = cpu_root_microcode_attrs,
 };
 
-int __init microcode_init(void)
+static int __init microcode_init(void)
 {
 	struct cpuinfo_x86 *c = &boot_cpu_data;
 	int error;