CONFIG_USB_F_ACM (not configurable)

modulename: usb_f_acm.ko

configname: CONFIG_USB_F_ACM

Linux Kernel Configuration
└─>Device Drivers
└─>USB support
└─>USB Gadget Support
└─>USB_F_ACM
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/usb/gadget/