xengnt_grant_access
int xengnt_grant_access(domid_t, paddr_t, int, grant_ref_t *);
if (__predict_false(xengnt_grant_access(
if (xengnt_grant_access(otherend_id, trunc_page(ma),
if ((ret = xengnt_grant_access(mga->domid, ma, ro, &id)) != 0) {
if (__predict_false(xengnt_grant_access(
if (xengnt_grant_access(
int err = xengnt_grant_access(dev->xbusd_otherend_id, ring_pa,