btrfs_sysfs_add_device
ret = btrfs_sysfs_add_device(tgt_device);
ret = btrfs_sysfs_add_device(device);
ret = btrfs_sysfs_add_device(device);
int btrfs_sysfs_add_device(struct btrfs_device *device);
btrfs_sysfs_add_device(device);