Unable to enable or use the internuclear module (s)

I have a function in kernel 1 driver (KD1.ko):

static void test (void);
EXPORT_SYMBOL(test);

static void test() {
    printk("<<< MISSION DONE >>>.\n");
}

In kernel 2 driver (KD2.ko):

extern static void test (void);

which I tried to name.

I managed to embed KD1.ko, but I could not insert KD2.ko. Did I miss something?