XENBUS_MAX_RING_GRANT_ORDER
unsigned int xen_blkif_max_ring_order = XENBUS_MAX_RING_GRANT_ORDER;
if (xen_blkif_max_ring_order > XENBUS_MAX_RING_GRANT_ORDER) {
xen_blkif_max_ring_order, XENBUS_MAX_RING_GRANT_ORDER);
xen_blkif_max_ring_order = XENBUS_MAX_RING_GRANT_ORDER;
if (xen_blkif_max_ring_order > XENBUS_MAX_RING_GRANT_ORDER) {
xen_blkif_max_ring_order, XENBUS_MAX_RING_GRANT_ORDER);
xen_blkif_max_ring_order = XENBUS_MAX_RING_GRANT_ORDER;
#define MAX_RING_ORDER XENBUS_MAX_RING_GRANT_ORDER
#define PVCALLS_RING_ORDER XENBUS_MAX_RING_GRANT_ORDER
#define XENBUS_MAX_RING_GRANTS (1U << XENBUS_MAX_RING_GRANT_ORDER)