XENFB_OUT_RING_LEN  123 drivers/video/fbdev/xen-fbfront.c 	return prod - cons == XENFB_OUT_RING_LEN;
XENFB_OUT_RING_LEN  106 include/xen/interface/io/fbif.h 	(XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN])