Symbol: USB_LALTBIT
usr/src/uts/common/io/usb/clients/usbkbm/usbkbm.c
1740
if ((mkb & USB_LALTBIT) != (lastmkb & USB_LALTBIT)) {
usr/src/uts/common/io/usb/clients/usbkbm/usbkbm.c
1741
(*func)(usbkbmd, USB_LALTKEY, mkb & USB_LALTBIT ?