diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index 6789530ef33b..2b98e6ab1bf9 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -56,9 +56,6 @@ MODULE_LICENSE("GPL v2");
 	((((struct microcode_amd *)mc)->hdr.mc_patch_data_len * 28) \
 	 + MC_HEADER_SIZE)
 
-extern int microcode_init(void *opaque, struct module *module);
-extern void microcode_exit(void);
-
 /* serialize access to the physical write */
 static DEFINE_SPINLOCK(microcode_update_lock);