CONFIG_USB_F_MIDI (not configurable)

modulename: usb_f_midi.ko

configname: CONFIG_USB_F_MIDI

Linux Kernel Configuration
└─>Device Drivers
└─>USB support
└─>USB Gadget Support
└─>USB_F_MIDI
In linux kernel since version 3.19 (release Date: 2015-02-08)  
source code:
drivers/usb/gadget/function//