usb_port_resume_delay
CTLTYPE_UINT | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, &usb_port_resume_delay,
sizeof(usb_port_resume_delay), usb_timings_sysctl_handler, "IU",
unsigned usb_port_resume_delay = USB_PORT_RESUME_DELAY;
extern unsigned usb_port_resume_delay;
usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay));
usb_pause_mtx(NULL, USB_MS_TO_TICKS(usb_port_resume_delay));