ちなみに、lsmodの結果です。

Module Size Used by Nottainted
rtl_sched 44352 0 (unused)
rtl_fifo 11200 0 (unused)
rtl_posixio 7904 0 [rtl_fifo]
rtl_time 12360 0 [rtl_sched rtl_posixio]
rtl 30048 0 rtl_sched rtl_fifo rtl posixio rtl_time]

rtl_schedとrtl_fifoの(unused)が気になるのですが、、、