ser_str
struct ser_str sl_stream; /* data path device points thru here */
struct ser_str *stp = (struct ser_str *)wq->q_ptr;
struct ser_str *zsh_str = NULL;
struct ser_str *stp;
stp = kmem_zalloc(sizeof (struct ser_str), KM_NOSLEEP);
struct ser_str *stp;
stp = (struct ser_str *)rq->q_ptr;
kmem_free(stp, sizeof (struct ser_str));
struct ser_str *stp = (struct ser_str *)wq->q_ptr;