rdsk_node_t
rdsk_node_t tmpnode;
rdsk_node_t *node;
rdsk_node_t *rn = arg;
rdsk_node_t *slice;
sizeof (rdsk_node_t), offsetof(rdsk_node_t, rn_node));
slice = zutil_alloc(hdl, sizeof (rdsk_node_t));
const char *nm1 = ((rdsk_node_t *)arg1)->rn_name;
const char *nm2 = ((rdsk_node_t *)arg2)->rn_name;