openwrt/target/linux/generic-2.6/patches-2.6.31/999-use_preinit_as_init.patch

--- a/init/main.c
+++ b/init/main.c
@@ -863,10 +863,7 @@ static noinline int init_post(void)
 		printk(KERN_WARNING "Failed to execute %s.  Attempting "
 					"defaults...\n", execute_command);
 	}
-	run_init_process("/sbin/init");
-	run_init_process("/etc/init");
-	run_init_process("/bin/init");
-	run_init_process("/bin/sh");
+	run_init_process("/etc/preinit");
 
 	panic("No init found.  Try passing init= option to kernel.");
 }