hashfn
hval = hashfn(hdp, clp->path);
hval = hashfn(hdp, link);
hval = hashfn(hdp, clp->path);
static uint_t hashfn(struct di_devlink_handle *hdp, const char *str);
h->hashfn = hashf;
unsigned int i = h->hashfn(k);
unsigned int (*hashfn) (void *k);