usb_pc_load_mem
usb_pc_load_mem(xfer->frbuffers,
usb_pc_load_mem(xfer->frbuffers + nframes,
uint8_t usb_pc_load_mem(struct usb_page_cache *pc, usb_size_t size,
if (usb_pc_load_mem(pc, size, 1 /* synchronous */ )) {