Hi,

Lu Baolu <baolu.lu@linux.intel.com> writes:
> The component u_serial provides a glue layer between TTY layer
> and a USB gadget device needed to provide a basic serial port
> functionality. Currently, u_serial sits under gadget/function
> and depends on CONFIG_USB_GADGET to be compiled and used.
>
> Most of the serial gadget devices are based on a UDC (USB device
> controller) and implemented by making use of the Linux gadget
> frameworks. But we are facing other implementions as well. One
> example can be found with xHCI debug capability. The xHCI debug
> capability implements a serial gadget with hardware and firmware,
> and provides an interface similar with xHCI host for submitting
> and reaping the transfer requests.
>
> In order to make better use of u_serial when implementing xHCI
> debug capability in xHCI driver, this patch moves u_serial.c
> from gadget/function to usb/common, and moves u_serial.h from
> gadget/function to include/linux/usb.
>
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>

NAK, u_serial uses the gadget API. It's definitely not COMMON.

-- 
balbi