> +static const struct attribute_group integrity_group = { Double whitespace before the = > + .name = "integrity", .attrs = integrity_attrs, > }; We generally put each field member on separate lines for readability. > int blk_integrity_add(struct gendisk *disk) > { > + return device_add_groups(disk_to_dev(disk), integrity_groups); > } > > void blk_integrity_del(struct gendisk *disk) > { > + device_remove_groups(disk_to_dev(disk), integrity_groups); Can't we just add integrity_group to disk_attr_groups and remove these calls entirely?