[  504.717378] g_mass_storage: Unknown symbol usb_interface_id (err 0)
[  504.730243] g_mass_storage: Unknown symbol usb_assign_descriptors (err 0)
[  504.737176] g_mass_storage: Unknown symbol usb_string_id (err 0)
[  504.760261] g_mass_storage: Unknown symbol usb_string_ids_tab (err 0)
[  504.767098] g_mass_storage: Unknown symbol usb_composite_unregister (err 0)
[  504.780291] g_mass_storage: Unknown symbol config_ep_by_speed (err 0)
[  504.786907] g_mass_storage: Unknown symbol usb_add_function (err 0)
[  504.800216] g_mass_storage: Unknown symbol usb_composite_probe (err 0)
[  504.806915] g_mass_storage: Unknown symbol usb_composite_overwrite_options (err 0)
[  504.830225] g_mass_storage: Unknown symbol usb_composite_setup_continue (err 0)
[  504.837709] g_mass_storage: Unknown symbol usb_ep_autoconfig (err 0)
[  504.850362] g_mass_storage: Unknown symbol usb_add_config (err 0)
[  504.856603] g_mass_storage: Unknown symbol usb_free_all_descriptors (err 0)
[  514.295700] g_mass_storage: Unknown symbol usb_interface_id (err 0)
[  514.303496] g_mass_storage: Unknown symbol usb_assign_descriptors (err 0)
[  514.311609] g_mass_storage: Unknown symbol usb_string_id (err 0)
[  514.317793] g_mass_storage: Unknown symbol usb_string_ids_tab (err 0)
[  514.324790] g_mass_storage: Unknown symbol usb_composite_unregister (err 0)
[  514.335298] g_mass_storage: Unknown symbol config_ep_by_speed (err 0)
[  514.343276] g_mass_storage: Unknown symbol usb_add_function (err 0)
[  514.349673] g_mass_storage: Unknown symbol usb_composite_probe (err 0)
[  514.356737] g_mass_storage: Unknown symbol usb_composite_overwrite_options (err 0)
[  514.367789] g_mass_storage: Unknown symbol usb_composite_setup_continue (err 0)
[  514.376519] g_mass_storage: Unknown symbol usb_ep_autoconfig (err 0)
[  514.384350] g_mass_storage: Unknown symbol usb_add_config (err 0)
[  514.391769] g_mass_storage: Unknown symbol usb_free_all_descriptors (err 0)
[  696.728263] libcomposite: Unknown symbol usb_gadget_probe_driver (err 0)
[  696.735672] libcomposite: Unknown symbol usb_gadget_unregister_driver (err 0)
[ 6511.018079] couldn't find an available UDC