BTRFS_PROP_HANDLERS_HT_BITS   15 fs/btrfs/props.c static DEFINE_HASHTABLE(prop_handlers_ht, BTRFS_PROP_HANDLERS_HT_BITS);
BTRFS_PROP_HANDLERS_HT_BITS   30 fs/btrfs/props.c 	h = &prop_handlers_ht[hash_min(hash, BTRFS_PROP_HANDLERS_HT_BITS)];