diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index 5d24c17..1217ceb 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -267,7 +267,20 @@
  */
 u32 cpu_get_stepping(void);
 
+/**
+ * board_final_init() - Final initialization hook (optional)
+ *
+ * Implements a custom initialization for boards that need to do it
+ * before the system is ready.
+ */
 void board_final_init(void);
+
+/**
+ * board_final_cleanup() - Final cleanup hook (optional)
+ *
+ * Implements a custom cleanup for boards that need to do it before
+ * booting the OS.
+ */
 void board_final_cleanup(void);
 
 #ifndef CONFIG_EFI_STUB