RING_BD_TOGGLE_INVALID   64 drivers/mailbox/bcm-flexrm-mailbox.c 			(!RING_BD_TOGGLE_INVALID(offset))
RING_BD_TOGGLE_INVALID 1262 drivers/mailbox/bcm-flexrm-mailbox.c 			d = flexrm_null_desc(RING_BD_TOGGLE_INVALID(off));