rhashtable: Add rhashtable_lookup_get_insert_fast

	return ret == NULL ? 0 : -EEXIST;

}

/**

 * rhashtable_lookup_get_insert_fast - lookup and insert object into hash table

 * @ht:		hash table

 * @obj:	pointer to hash head inside object

 * @params:	hash table parameters

 *

 * Just like rhashtable_lookup_insert_fast(), but this function returns the

 * object if it exists, NULL if it did not and the insertion was successful,

 * and an ERR_PTR otherwise.

 */

static inline void *rhashtable_lookup_get_insert_fast(

	struct rhashtable *ht, struct rhash_head *obj,

	const struct rhashtable_params params)

{

	const char *key = rht_obj(ht, obj);

	BUG_ON(ht->p.obj_hashfn);

	return __rhashtable_insert_fast(ht, key + ht->p.key_offset, obj, params,

					false);

}

/**

 * rhashtable_lookup_insert_key - search and insert object to hash table

 *				  with explicit key