fs/btrfs/disk-io.c

1507 		if (!mutex_trylock(&fs_info->cleaner_mutex))
1515 			mutex_unlock(&fs_info->cleaner_mutex);
1525 		mutex_unlock(&fs_info->cleaner_mutex);
1536 		 * acquires fs_info->cleaner_mutex (btrfs_relocate_block_group)
1538 		 * can't hold, nor need to, fs_info->cleaner_mutex when deleting
2800 	mutex_init(&fs_info->cleaner_mutex);
3037 	mutex_lock(&fs_info->cleaner_mutex);
3039 	mutex_unlock(&fs_info->cleaner_mutex);
4164 	mutex_lock(&fs_info->cleaner_mutex);
4166 	mutex_unlock(&fs_info->cleaner_mutex);
4460 	mutex_lock(&fs_info->cleaner_mutex);
4462 	mutex_unlock(&fs_info->cleaner_mutex);