* - array of hash-head starting from hsb_head[0], hash-head can be one of
* . cfs_hash_head_t
* . cfs_hash_head_dep_t
- * . cfs_hash_dhead_t
- * . cfs_hash_dhead_dep_t
+ * . struct cfs_hash_dhead
+ * . struct cfs_hash_dhead_dep
* which depends on requirement of user
* - some extra bytes (caller can require it while creating hash)
*/