xen_sysctl_t
xen_sysctl_t op;
HYPERVISOR_sysctl(xen_sysctl_t *sysctl)
DEFINE_XEN_GUEST_HANDLE(xen_sysctl_t);
xen_sysctl_t xs;
(xen_sysctl_t *)hc->arg[0]);
privcmd_HYPERVISOR_sysctl(xen_sysctl_t *opp)
xen_sysctl_t op, dop;
xen_sysctl_t op;
extern long HYPERVISOR_sysctl(xen_sysctl_t *);