vm_domain_alloc_fail
static int vm_domain_alloc_fail(struct vm_domain *vmd, vm_object_t object,
(void)vm_domain_alloc_fail(vmd, object, req);
(void)vm_domain_alloc_fail(VM_DOMAIN(domain), object, req);
if (!vm_domain_alloc_fail(vmd, NULL, req))
if (!vm_domain_alloc_fail(VM_DOMAIN(domain), NULL, req))