hashmap__init
hashmap__init(map, hash_fn, equal_fn, ctx);
void hashmap__init(struct hashmap *map, hashmap_hash_fn hash_fn,
hashmap__init(&schash, sc_node_hash, sc_node_equal, /*ctx=*/NULL);
hashmap__init(&slab_hash, slab_cache_hash, slab_cache_equal, /*ctx=*/NULL);
hashmap__init(map, hash_fn, equal_fn, ctx);
void hashmap__init(struct hashmap *map, hashmap_hash_fn hash_fn,
hashmap__init(&hwm->events, hwmon_pmu__event_hashmap_hash,
hashmap__init(&table->shard, key_hash, key_equal, NULL);