feature_get_refcount
(void) feature_get_refcount(spa,
(void) feature_get_refcount(spa,
(void) feature_get_refcount(spa,
(void) feature_get_refcount(spa,
extern int feature_get_refcount(struct spa *, zfeature_info_t *, uint64_t *);
VERIFY3U(feature_get_refcount(spa, feature, &refcount), !=, ENOTSUP);
err = feature_get_refcount(spa, &spa_feature_table[fid], &refcount);
err = feature_get_refcount(spa, &spa_feature_table[fid], &refcount);