HelenOS sources

usb_device_bus_exchange_begin   83 uspace/drv/bus/usb/usbhub/port.c 	async_exch_t *exch = usb_device_bus_exchange_begin(port->hub->usb_device);
usb_device_bus_exchange_begin  195 uspace/drv/bus/usb/usbhub/port.c 	async_exch_t *exch = usb_device_bus_exchange_begin(port->hub->usb_device);
usb_device_bus_exchange_begin   62 uspace/drv/bus/usb/usbmid/usbmid.c 	async_exch_t *exch = usb_device_bus_exchange_begin(usb_dev);
usb_device_bus_exchange_begin   77 uspace/lib/usbdev/include/usb/dev/device.h async_exch_t *usb_device_bus_exchange_begin(usb_device_t *);