diff --git a/kernel/sys.c b/kernel/sys.c
index f88dadc80186..dd29555462c3 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -334,6 +334,7 @@ void kernel_restart_prepare(char *cmd)
 void kernel_restart(char *cmd)
 {
 	kernel_restart_prepare(cmd);
+	disable_nonboot_cpus();
 	if (!cmd)
 		printk(KERN_EMERG "Restarting system.\n");
 	else