insmod /lib/modules/4.9.0-xilinx-v2017.4/kernel/drivers/mtd/tests/mtd_speedtest.ko dev=0                                                                                                          
rmmod mtd_speedtest.ko                                                                                       
insmod /lib/modules/4.9.0-xilinx-v2017.4/kernel/drivers/mtd/tests/mtd_speedtest.ko dev=1                     
rmmod mtd_speedtest.ko  
insmod /lib/modules/4.9.0-xilinx-v2017.4/kernel/drivers/mtd/tests/mtd_speedtest.ko dev=2                     
rmmod mtd_speedtest.ko