nfs4_delmap_args_t
nfs4_delmap_args_t *dmapp;
dmapp = kmem_alloc(sizeof (nfs4_delmap_args_t), KM_SLEEP);
nfs4_delmap_args_t *dmapp = (nfs4_delmap_args_t *)arg;
kmem_free(dmapp, sizeof (nfs4_delmap_args_t));