XENDISPL_IN_RING_OFFS  855 include/xen/interface/io/displif.h #define XENDISPL_IN_RING_SIZE (XENDISPL_EVENT_PAGE_SIZE - XENDISPL_IN_RING_OFFS)
XENDISPL_IN_RING_OFFS  858 include/xen/interface/io/displif.h 	((struct xendispl_evt *)((char *)(page) + XENDISPL_IN_RING_OFFS))