dm_delay_info
sizeof(struct dm_delay_info));
ti->per_io_data_size = sizeof(struct dm_delay_info);
struct dm_delay_info *delayed;
delayed = dm_per_bio_data(bio, sizeof(struct dm_delay_info));
struct dm_delay_info *delayed = dm_per_bio_data(bio, sizeof(struct dm_delay_info));
struct dm_delay_info *delayed, *next;