diff --git a/init/main.c b/init/main.c
index bce0eb7..ae04eb7 100644
--- a/init/main.c
+++ b/init/main.c
@@ -446,10 +446,17 @@
 	cpu_set(cpu, cpu_possible_map);
 }
 
+void __init __attribute__((weak)) smp_setup_processor_id(void)
+{
+}
+
 asmlinkage void __init start_kernel(void)
 {
 	char * command_line;
 	extern struct kernel_param __start___param[], __stop___param[];
+
+	smp_setup_processor_id();
+
 /*
  * Interrupts are still disabled. Do necessary setups, then
  * enable them