* @list: List head for list of arenas
* @debugfs_dir: Debugfs dentry
* @flags: Arena flags - may signify error states.
+ * @err_lock: Mutex for synchronizing error clearing.
*
* arena_info is a per-arena handle. Once an arena is narrowed down for an
* IO, this struct is passed around for the duration of the IO.
* @init_lock: Mutex used for the BTT initialization
* @init_state: Flag describing the initialization state for the BTT
* @num_arenas: Number of arenas in the BTT instance
+ * @phys_bb: Pointer to the namespace's badblocks structure
*/
struct btt {
struct gendisk *btt_disk;