u0_a54@android:/ $ su
# cd /system/vendor/modules
# ls
8188eu.ko
8189es.ko
8192cu.ko
8723as.ko
8723au.ko
Module.symvers
afa750.ko
ar6302.ko
ath3k.ko
ath6k
bcm203x.ko
bcm40181_dhd.ko
bcm40181_fw.bin
bcm40181_nvram.txt
bcm40183.hcd
bcm40183_dhd.ko
bcm40183_fw.bin
bcm40183_nvram.txt
bcm4330.ko
bcmdhd.ko
bfusb.ko
bma250.ko
bpa10x.ko
btmrvl.ko
btmrvl_sdio.ko
btusb.ko
camera.ko
device.ko
disp.ko
dmard10.ko
example.ko
ft5x_ts.ko
fxos8700.ko
gc0307.ko
gc0308.ko
gc0309.ko
gc0329.ko
gc2015.ko
gc2035.ko
gpio-sunxi.ko
gslX680.ko
gspca_main.ko
gt2005.ko
gt811.ko
gt82x.ko
gt9xx_ts.ko
hci_vhci.ko
hdmi.ko
hi253.ko
hi704.ko
hid-logitech-dj.ko
joydev.ko
kxtik.ko
l3gd20_gyr.ko
lcd.ko
lis3de_acc.ko
lis3dh_acc.ko
lsm303d.ko
mali.ko
mma7660.ko
mma8452.ko
mma865x.ko
mt9d112.ko
mt9m112.ko
mt9m113.ko
nand.ko
ov2643.ko
ov2655.ko
ov5640.ko
rt2500usb.ko
rt2800lib.ko
rt2800usb.ko
rt2x00lib.ko
rt2x00usb.ko
rt73usb.ko
s5k4ec.ko
scsi_wait_scan.ko
sp0838.ko
sun7i_tvd.ko
sunxi-ts.ko
sunxi_csi0.ko
sunxi_csi1.ko
sunxi_gmac.ko
ump.ko
videobuf-core.ko
videobuf-dma-contig.ko
zet622x.ko
# insmod /system/vendor/modules/rt2800usb.ko
insmod: init_module '/system/vendor/modules/rt2800usb.ko' failed (No such file or directory)

in dmesg this

<4>[  118.868050] rt2800usb: Unknown symbol rt2x00mac_sw_scan_complete (err 0)
<4>[  118.868096] rt2800usb: Unknown symbol rt2800_config_shared_key (err 0)
<4>[  118.868114] rt2800usb: Unknown symbol rt2x00mac_add_interface (err 0)
<4>[  118.868132] rt2800usb: Unknown symbol rt2800_enable_radio (err 0)
<4>[  118.868149] rt2800usb: Unknown symbol rt2800_reset_tuner (err 0)
<4>[  118.868166] rt2800usb: Unknown symbol rt2x00mac_get_stats (err 0)
<4>[  118.868182] rt2800usb: Unknown symbol rt2x00mac_sta_remove (err 0)
<4>[  118.868200] rt2800usb: Unknown symbol rt2800_validate_eeprom (err 0)
<4>[  118.868218] rt2800usb: Unknown symbol rt2x00lib_txdone_noinfo (err 0)
<4>[  118.868706] rt2800usb: Unknown symbol rt2800_link_stats (err 0)
<4>[  118.868747] rt2800usb: Unknown symbol rt2x00usb_disable_radio (err 0)
<4>[  118.868766] rt2800usb: Unknown symbol rt2800_rfkill_poll (err 0)
<4>[  118.868783] rt2800usb: Unknown symbol rt2800_txdone_entry (err 0)
<4>[  118.868800] rt2800usb: Unknown symbol rt2800_probe_hw_mode (err 0)
<4>[  118.868829] rt2800usb: Unknown symbol rt2800_read_eeprom_efuse (err 0)
<4>[  118.868846] rt2800usb: Unknown symbol rt2x00mac_set_key (err 0)
<4>[  118.868863] rt2800usb: Unknown symbol rt2800_efuse_detect (err 0)
<4>[  118.868880] rt2800usb: Unknown symbol rt2800_config_filter (err 0)
<4>[  118.868897] rt2800usb: Unknown symbol rt2800_conf_tx (err 0)
<4>[  118.868913] rt2800usb: Unknown symbol rt2x00mac_sw_scan_start (err 0)
<4>[  118.868931] rt2800usb: Unknown symbol rt2x00mac_tx_frames_pending (err 0)
<4>[  118.868948] rt2800usb: Unknown symbol rt2800_check_firmware (err 0)
<4>[  118.868967] rt2800usb: Unknown symbol rt2800_rt2x00debug (err 0)
<4>[  118.869299] rt2800usb: Unknown symbol rt2x00usb_vendor_request_buff (err 0)
<4>[  118.869337] rt2800usb: Unknown symbol rt2800_mcu_request (err 0)
<4>[  118.869355] rt2800usb: Unknown symbol rt2800_init_eeprom (err 0)
<4>[  118.869373] rt2800usb: Unknown symbol rt2800_config_pairwise_key (err 0)
<4>[  118.869390] rt2800usb: Unknown symbol rt2800_wait_csr_ready (err 0)
<4>[  118.869419] rt2800usb: Unknown symbol rt2x00queue_get_entry (err 0)
<4>[  118.869447] rt2800usb: Unknown symbol rt2800_clear_beacon (err 0)
<4>[  118.869464] rt2800usb: Unknown symbol rt2800_get_tsf (err 0)
<4>[  118.869480] rt2800usb: Unknown symbol rt2x00mac_remove_interface (err 0)
<4>[  118.869610] rt2800usb: Unknown symbol rt2x00usb_vendor_request (err 0)
<4>[  118.869632] rt2800usb: Unknown symbol rt2x00usb_probe (err 0)
<4>[  118.869650] rt2800usb: Unknown symbol rt2x00usb_watchdog (err 0)
<4>[  118.869684] rt2800usb: Unknown symbol rt2800_load_firmware (err 0)
<4>[  118.869702] rt2800usb: Unknown symbol rt2x00mac_config (err 0)
<4>[  118.869727] rt2800usb: Unknown symbol rt2x00usb_suspend (err 0)
<4>[  118.869744] rt2800usb: Unknown symbol rt2x00usb_clear_entry (err 0)
<4>[  118.869769] rt2800usb: Unknown symbol rt2x00mac_start (err 0)
<4>[  118.869900] rt2800usb: Unknown symbol rt2x00mac_rfkill_poll (err 0)
<4>[  118.869921] rt2800usb: Unknown symbol rt2800_process_rxwi (err 0)
<4>[  118.869938] rt2800usb: Unknown symbol rt2x00mac_set_tim (err 0)
<4>[  118.869955] rt2800usb: Unknown symbol rt2x00mac_stop (err 0)
<4>[  118.869972] rt2800usb: Unknown symbol rt2800_link_tuner (err 0)
<4>[  118.870012] rt2800usb: Unknown symbol rt2800_config_intf (err 0)
<4>[  118.870030] rt2800usb: Unknown symbol rt2800_set_rts_threshold (err 0)
<4>[  118.870047] rt2800usb: Unknown symbol rt2800_wait_wpdma_ready (err 0)
<4>[  118.870064] rt2800usb: Unknown symbol rt2x00mac_configure_filter (err 0)
<4>[  118.870083] rt2800usb: Unknown symbol rt2x00usb_disconnect (err 0)
<4>[  118.870100] rt2800usb: Unknown symbol rt2800_sta_remove (err 0)
<4>[  118.870116] rt2800usb: Unknown symbol rt2x00mac_flush (err 0)
<4>[  118.870133] rt2800usb: Unknown symbol rt2800_get_tkip_seq (err 0)
<4>[  118.870150] rt2800usb: Unknown symbol rt2800_write_tx_data (err 0)
<4>[  118.870175] rt2800usb: Unknown symbol rt2800_disable_radio (err 0)
<4>[  118.870200] rt2800usb: Unknown symbol rt2800_ampdu_action (err 0)
<4>[  118.870216] rt2800usb: Unknown symbol rt2800_config_ant (err 0)
<4>[  118.870233] rt2800usb: Unknown symbol rt2x00usb_register_read_async (err 0)
<4>[  118.870251] rt2800usb: Unknown symbol rt2x00mac_tx (err 0)
<4>[  118.870267] rt2800usb: Unknown symbol rt2800_sta_add (err 0)
<4>[  118.870284] rt2800usb: Unknown symbol rt2x00mac_sta_add (err 0)
<4>[  118.870311] rt2800usb: Unknown symbol rt2800_config (err 0)
<4>[  118.870328] rt2800usb: Unknown symbol rt2x00usb_vendor_req_buff_lock (err 0)
<4>[  118.870354] rt2800usb: Unknown symbol rt2x00usb_regbusy_read (err 0)
<4>[  118.870372] rt2800usb: Unknown symbol rt2x00usb_kick_queue (err 0)
<4>[  118.870389] rt2800usb: Unknown symbol rt2800_write_beacon (err 0)
<4>[  118.870405] rt2800usb: Unknown symbol rt2800_gain_calibration (err 0)
<4>[  118.870422] rt2800usb: Unknown symbol rt2x00usb_resume (err 0)
<4>[  118.870446] rt2800usb: Unknown symbol rt2x00usb_uninitialize (err 0)
<4>[  118.870463] rt2800usb: Unknown symbol rt2x00usb_initialize (err 0)
<4>[  118.870480] rt2800usb: Unknown symbol rt2800_get_survey (err 0)
<4>[  118.870504] rt2800usb: Unknown symbol rt2800_config_erp (err 0)
<4>[  118.870521] rt2800usb: Unknown symbol rt2x00usb_flush_queue (err 0)
<4>[  118.870538] rt2800usb: Unknown symbol rt2x00mac_get_ringparam (err 0)
<4>[  118.870557] rt2800usb: Unknown symbol rt2x00mac_bss_info_changed (err 0)