struct bio *bio = bio_alloc(GFP_NOIO, 1);
struct page *page =  alloc_page(GFP_KERNEL)
struct completion event;
bio->bi_bdev = conf->disks[0].rdev;
bio->bi_sector = (sector_t) 0;
bio_add_page(bio, page, (sizeof(struct nuda_table)) * conf->nbr_chunk, 0);
init_completion(&event);
bio->bi_private = &event;
bio->bi_end_io = readComplete;

submit_bio(READ | REQ_SYNC, bio);
wait_for_completion(&event);
bio_put(bio);