wb_list_data
sc->wb_ldata = contigmalloc(sizeof(struct wb_list_data) + 8, M_DEVBUF,
contigfree(sc->wb_ldata_ptr, sizeof(struct wb_list_data) + 8,
struct wb_list_data *ld;
struct wb_list_data *ld;
struct wb_list_data *wb_ldata;