diff --git a/arch/m68k/emu/nfblock.c b/arch/m68k/emu/nfblock.c
index 92d26c812441..ba808543161a 100644
--- a/arch/m68k/emu/nfblock.c
+++ b/arch/m68k/emu/nfblock.c
@@ -61,7 +61,7 @@ struct nfhd_device {
 
 static blk_qc_t nfhd_submit_bio(struct bio *bio)
 {
-	struct nfhd_device *dev = bio->bi_disk->private_data;
+	struct nfhd_device *dev = bio->bi_bdev->bd_disk->private_data;
 	struct bio_vec bvec;
 	struct bvec_iter iter;
 	int dir, len, shift;
diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c
index 3447556d276d..fc09be7b1347 100644
--- a/arch/xtensa/platforms/iss/simdisk.c
+++ b/arch/xtensa/platforms/iss/simdisk.c
@@ -103,7 +103,7 @@ static void simdisk_transfer(struct simdisk *dev, unsigned long sector,
 
 static blk_qc_t simdisk_submit_bio(struct bio *bio)
 {
-	struct simdisk *dev = bio->bi_disk->private_data;
+	struct simdisk *dev = bio->bi_bdev->bd_disk->private_data;
 	struct bio_vec bvec;
 	struct bvec_iter iter;
 	sector_t sector = bio->bi_iter.bi_sector;
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 9ffd7e289554..c3e5abcfdc98 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -140,7 +140,7 @@ int bio_integrity_add_page(struct bio *bio, struct page *page,
 	iv = bip->bip_vec + bip->bip_vcnt;
 
 	if (bip->bip_vcnt &&
-	    bvec_gap_to_prev(bio->bi_disk->queue,
+	    bvec_gap_to_prev(bio->bi_bdev->bd_disk->queue,
 			     &bip->bip_vec[bip->bip_vcnt - 1], offset))
 		return 0;
 
@@ -162,7 +162,7 @@ EXPORT_SYMBOL(bio_integrity_add_page);
 static blk_status_t bio_integrity_process(struct bio *bio,
 		struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn)
 {
-	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
 	struct blk_integrity_iter iter;
 	struct bvec_iter bviter;
 	struct bio_vec bv;
@@ -171,7 +171,7 @@ static blk_status_t bio_integrity_process(struct bio *bio,
 	void *prot_buf = page_address(bip->bip_vec->bv_page) +
 		bip->bip_vec->bv_offset;
 
-	iter.disk_name = bio->bi_disk->disk_name;
+	iter.disk_name = bio->bi_bdev->bd_disk->disk_name;
 	iter.interval = 1 << bi->interval_exp;
 	iter.seed = proc_iter->bi_sector;
 	iter.prot_buf = prot_buf;
@@ -208,8 +208,8 @@ static blk_status_t bio_integrity_process(struct bio *bio,
 bool bio_integrity_prep(struct bio *bio)
 {
 	struct bio_integrity_payload *bip;
-	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
-	struct request_queue *q = bio->bi_disk->queue;
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
+	struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 	void *buf;
 	unsigned long start, end;
 	unsigned int len, nr_pages;
@@ -329,7 +329,7 @@ static void bio_integrity_verify_fn(struct work_struct *work)
 	struct bio_integrity_payload *bip =
 		container_of(work, struct bio_integrity_payload, bip_work);
 	struct bio *bio = bip->bip_bio;
-	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
 
 	/*
 	 * At the moment verify is called bio's iterator was advanced
@@ -355,7 +355,7 @@ static void bio_integrity_verify_fn(struct work_struct *work)
  */
 bool __bio_integrity_endio(struct bio *bio)
 {
-	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
 	struct bio_integrity_payload *bip = bio_integrity(bio);
 
 	if (bio_op(bio) == REQ_OP_READ && !bio->bi_status &&
@@ -381,7 +381,7 @@ bool __bio_integrity_endio(struct bio *bio)
 void bio_integrity_advance(struct bio *bio, unsigned int bytes_done)
 {
 	struct bio_integrity_payload *bip = bio_integrity(bio);
-	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
 	unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9);
 
 	bip->bip_iter.bi_sector += bytes_done >> 9;
@@ -397,7 +397,7 @@ void bio_integrity_advance(struct bio *bio, unsigned int bytes_done)
 void bio_integrity_trim(struct bio *bio)
 {
 	struct bio_integrity_payload *bip = bio_integrity(bio);
-	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
 
 	bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio));
 }
diff --git a/block/bio.c b/block/bio.c
index 1f2cc1fbe283..0b70ade17da6 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -607,16 +607,7 @@ void bio_truncate(struct bio *bio, unsigned new_size)
  */
 void guard_bio_eod(struct bio *bio)
 {
-	sector_t maxsector;
-	struct block_device *part;
-
-	rcu_read_lock();
-	part = __disk_get_part(bio->bi_disk, bio->bi_partno);
-	if (part)
-		maxsector = bdev_nr_sectors(part);
-	else	
-		maxsector = get_capacity(bio->bi_disk);
-	rcu_read_unlock();
+	sector_t maxsector = bdev_nr_sectors(bio->bi_bdev);
 
 	if (!maxsector)
 		return;
@@ -676,11 +667,10 @@ void __bio_clone_fast(struct bio *bio, struct bio *bio_src)
 	BUG_ON(bio->bi_pool && BVEC_POOL_IDX(bio));
 
 	/*
-	 * most users will be overriding ->bi_disk with a new target,
+	 * most users will be overriding ->bi_bdev with a new target,
 	 * so we don't set nor calculate new physical/hw segment counts here
 	 */
-	bio->bi_disk = bio_src->bi_disk;
-	bio->bi_partno = bio_src->bi_partno;
+	bio->bi_bdev = bio_src->bi_bdev;
 	bio_set_flag(bio, BIO_CLONED);
 	if (bio_flagged(bio_src, BIO_THROTTLED))
 		bio_set_flag(bio, BIO_THROTTLED);
@@ -730,7 +720,7 @@ EXPORT_SYMBOL(bio_clone_fast);
 
 const char *bio_devname(struct bio *bio, char *buf)
 {
-	return disk_name(bio->bi_disk, bio->bi_partno, buf);
+	return bdevname(bio->bi_bdev, buf);
 }
 EXPORT_SYMBOL(bio_devname);
 
@@ -1037,7 +1027,7 @@ static int __bio_iov_append_get_pages(struct bio *bio, struct iov_iter *iter)
 {
 	unsigned short nr_pages = bio->bi_max_vecs - bio->bi_vcnt;
 	unsigned short entries_left = bio->bi_max_vecs - bio->bi_vcnt;
-	struct request_queue *q = bio->bi_disk->queue;
+	struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 	unsigned int max_append_sectors = queue_max_zone_append_sectors(q);
 	struct bio_vec *bv = bio->bi_io_vec + bio->bi_vcnt;
 	struct page **pages = (struct page **)bv;
@@ -1145,7 +1135,8 @@ static void submit_bio_wait_endio(struct bio *bio)
  */
 int submit_bio_wait(struct bio *bio)
 {
-	DECLARE_COMPLETION_ONSTACK_MAP(done, bio->bi_disk->lockdep_map);
+	DECLARE_COMPLETION_ONSTACK_MAP(done,
+			bio->bi_bdev->bd_disk->lockdep_map);
 	unsigned long hang_check;
 
 	bio->bi_private = &done;
@@ -1422,8 +1413,8 @@ again:
 	if (!bio_integrity_endio(bio))
 		return;
 
-	if (bio->bi_disk)
-		rq_qos_done_bio(bio->bi_disk->queue, bio);
+	if (bio->bi_bdev)
+		rq_qos_done_bio(bio->bi_bdev->bd_disk->queue, bio);
 
 	/*
 	 * Need to have a real endio function for chained bios, otherwise
@@ -1438,8 +1429,8 @@ again:
 		goto again;
 	}
 
-	if (bio->bi_disk && bio_flagged(bio, BIO_TRACE_COMPLETION)) {
-		trace_block_bio_complete(bio->bi_disk->queue, bio);
+	if (bio->bi_bdev && bio_flagged(bio, BIO_TRACE_COMPLETION)) {
+		trace_block_bio_complete(bio->bi_bdev->bd_disk->queue, bio);
 		bio_clear_flag(bio, BIO_TRACE_COMPLETION);
 	}
 
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 031114d454a6..3465d6ee708e 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1800,7 +1800,8 @@ static inline struct blkcg_gq *blkg_tryget_closest(struct bio *bio,
 	struct blkcg_gq *blkg, *ret_blkg = NULL;
 
 	rcu_read_lock();
-	blkg = blkg_lookup_create(css_to_blkcg(css), bio->bi_disk->queue);
+	blkg = blkg_lookup_create(css_to_blkcg(css),
+				  bio->bi_bdev->bd_disk->queue);
 	while (blkg) {
 		if (blkg_tryget(blkg)) {
 			ret_blkg = blkg;
@@ -1836,8 +1837,8 @@ void bio_associate_blkg_from_css(struct bio *bio,
 	if (css && css->parent) {
 		bio->bi_blkg = blkg_tryget_closest(bio, css);
 	} else {
-		blkg_get(bio->bi_disk->queue->root_blkg);
-		bio->bi_blkg = bio->bi_disk->queue->root_blkg;
+		blkg_get(bio->bi_bdev->bd_disk->queue->root_blkg);
+		bio->bi_blkg = bio->bi_bdev->bd_disk->queue->root_blkg;
 	}
 }
 EXPORT_SYMBOL_GPL(bio_associate_blkg_from_css);
diff --git a/block/blk-core.c b/block/blk-core.c
index 08ff8ca32529..a3a54cd86c9c 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -476,7 +476,7 @@ int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags)
 
 static inline int bio_queue_enter(struct bio *bio)
 {
-	struct request_queue *q = bio->bi_disk->queue;
+	struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 	bool nowait = bio->bi_opf & REQ_NOWAIT;
 	int ret;
 
@@ -712,7 +712,7 @@ static inline bool bio_check_ro(struct bio *bio, struct block_device *part)
 
 static noinline int should_fail_bio(struct bio *bio)
 {
-	if (should_fail_request(bio->bi_disk->part0, bio->bi_iter.bi_size))
+	if (should_fail_request(bdev_whole(bio->bi_bdev), bio->bi_iter.bi_size))
 		return -EIO;
 	return 0;
 }
@@ -741,13 +741,9 @@ static inline int bio_check_eod(struct bio *bio, sector_t maxsector)
  */
 static inline int blk_partition_remap(struct bio *bio)
 {
-	struct block_device *p;
+	struct block_device *p = bio->bi_bdev;
 	int ret = -EIO;
 
-	rcu_read_lock();
-	p = __disk_get_part(bio->bi_disk, bio->bi_partno);
-	if (unlikely(!p))
-		goto out;
 	if (unlikely(should_fail_request(p, bio->bi_iter.bi_size)))
 		goto out;
 	if (unlikely(bio_check_ro(bio, p)))
@@ -761,10 +757,9 @@ static inline int blk_partition_remap(struct bio *bio)
 				      bio->bi_iter.bi_sector -
 				      p->bd_start_sect);
 	}
-	bio->bi_partno = 0;
+	bio->bi_bdev = bdev_whole(p);
 	ret = 0;
 out:
-	rcu_read_unlock();
 	return ret;
 }
 
@@ -805,7 +800,8 @@ static inline blk_status_t blk_check_zone_append(struct request_queue *q,
 
 static noinline_for_stack bool submit_bio_checks(struct bio *bio)
 {
-	struct request_queue *q = bio->bi_disk->queue;
+	struct block_device *bdev = bio->bi_bdev;
+	struct request_queue *q = bdev->bd_disk->queue;
 	blk_status_t status = BLK_STS_IOERR;
 	struct blk_plug *plug;
 
@@ -825,13 +821,13 @@ static noinline_for_stack bool submit_bio_checks(struct bio *bio)
 	if (should_fail_bio(bio))
 		goto end_io;
 
-	if (bio->bi_partno) {
+	if (bio->bi_bdev->bd_partno) {
 		if (unlikely(blk_partition_remap(bio)))
 			goto end_io;
 	} else {
-		if (unlikely(bio_check_ro(bio, bio->bi_disk->part0)))
+		if (unlikely(bio_check_ro(bio, bdev_whole(bdev))))
 			goto end_io;
-		if (unlikely(bio_check_eod(bio, get_capacity(bio->bi_disk))))
+		if (unlikely(bio_check_eod(bio, get_capacity(bdev->bd_disk))))
 			goto end_io;
 	}
 
@@ -924,7 +920,7 @@ end_io:
 
 static blk_qc_t __submit_bio(struct bio *bio)
 {
-	struct gendisk *disk = bio->bi_disk;
+	struct gendisk *disk = bio->bi_bdev->bd_disk;
 	blk_qc_t ret = BLK_QC_T_NONE;
 
 	if (blk_crypto_bio_prep(&bio)) {
@@ -966,7 +962,7 @@ static blk_qc_t __submit_bio_noacct(struct bio *bio)
 	current->bio_list = bio_list_on_stack;
 
 	do {
-		struct request_queue *q = bio->bi_disk->queue;
+		struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 		struct bio_list lower, same;
 
 		if (unlikely(bio_queue_enter(bio) != 0))
@@ -987,7 +983,7 @@ static blk_qc_t __submit_bio_noacct(struct bio *bio)
 		bio_list_init(&lower);
 		bio_list_init(&same);
 		while ((bio = bio_list_pop(&bio_list_on_stack[0])) != NULL)
-			if (q == bio->bi_disk->queue)
+			if (q == bio->bi_bdev->bd_disk->queue)
 				bio_list_add(&same, bio);
 			else
 				bio_list_add(&lower, bio);
@@ -1012,7 +1008,7 @@ static blk_qc_t __submit_bio_noacct_mq(struct bio *bio)
 	current->bio_list = bio_list;
 
 	do {
-		struct gendisk *disk = bio->bi_disk;
+		struct gendisk *disk = bio->bi_bdev->bd_disk;
 
 		if (unlikely(bio_queue_enter(bio) != 0))
 			continue;
@@ -1055,7 +1051,7 @@ blk_qc_t submit_bio_noacct(struct bio *bio)
 		return BLK_QC_T_NONE;
 	}
 
-	if (!bio->bi_disk->fops->submit_bio)
+	if (!bio->bi_bdev->bd_disk->fops->submit_bio)
 		return __submit_bio_noacct_mq(bio);
 	return __submit_bio_noacct(bio);
 }
@@ -1067,7 +1063,7 @@ EXPORT_SYMBOL(submit_bio_noacct);
  *
  * submit_bio() is used to submit I/O requests to block devices.  It is passed a
  * fully set up &struct bio that describes the I/O that needs to be done.  The
- * bio will be send to the device described by the bi_disk and bi_partno fields.
+ * bio will be send to the device described by the bi_bdev field.
  *
  * The success/failure status of the request, along with notification of
  * completion, is delivered asynchronously through the ->bi_end_io() callback
@@ -1087,7 +1083,8 @@ blk_qc_t submit_bio(struct bio *bio)
 		unsigned int count;
 
 		if (unlikely(bio_op(bio) == REQ_OP_WRITE_SAME))
-			count = queue_logical_block_size(bio->bi_disk->queue) >> 9;
+			count = queue_logical_block_size(
+					bio->bi_bdev->bd_disk->queue) >> 9;
 		else
 			count = bio_sectors(bio);
 
diff --git a/block/blk-crypto-fallback.c b/block/blk-crypto-fallback.c
index c162b754efbd..8f1e18176731 100644
--- a/block/blk-crypto-fallback.c
+++ b/block/blk-crypto-fallback.c
@@ -167,7 +167,7 @@ static struct bio *blk_crypto_clone_bio(struct bio *bio_src)
 	bio = bio_alloc_bioset(GFP_NOIO, bio_segments(bio_src), NULL);
 	if (!bio)
 		return NULL;
-	bio->bi_disk		= bio_src->bi_disk;
+	bio->bi_bdev		= bio_src->bi_bdev;
 	bio->bi_opf		= bio_src->bi_opf;
 	bio->bi_ioprio		= bio_src->bi_ioprio;
 	bio->bi_write_hint	= bio_src->bi_write_hint;
diff --git a/block/blk-crypto.c b/block/blk-crypto.c
index 5da43f0973b4..09fcb18fa778 100644
--- a/block/blk-crypto.c
+++ b/block/blk-crypto.c
@@ -280,7 +280,7 @@ bool __blk_crypto_bio_prep(struct bio **bio_ptr)
 	 * Success if device supports the encryption context, or if we succeeded
 	 * in falling back to the crypto API.
 	 */
-	if (blk_ksm_crypto_cfg_supported(bio->bi_disk->queue->ksm,
+	if (blk_ksm_crypto_cfg_supported(bio->bi_bdev->bd_disk->queue->ksm,
 					 &bc_key->crypto_cfg))
 		return true;
 
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 808768f6b174..ffb4aa0ea68b 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -298,14 +298,13 @@ split:
  * Split a bio into two bios, chain the two bios, submit the second half and
  * store a pointer to the first half in *@bio. If the second bio is still too
  * big it will be split by a recursive call to this function. Since this
- * function may allocate a new bio from @bio->bi_disk->queue->bio_split, it is
- * the responsibility of the caller to ensure that
- * @bio->bi_disk->queue->bio_split is only released after processing of the
- * split bio has finished.
+ * function may allocate a new bio from q->bio_split, it is the responsibility
+ * of the caller to ensure that q->bio_split is only released after processing
+ * of the split bio has finished.
  */
 void __blk_queue_split(struct bio **bio, unsigned int *nr_segs)
 {
-	struct request_queue *q = (*bio)->bi_disk->queue;
+	struct request_queue *q = (*bio)->bi_bdev->bd_disk->queue;
 	struct bio *split = NULL;
 
 	switch (bio_op(*bio)) {
@@ -358,9 +357,9 @@ void __blk_queue_split(struct bio **bio, unsigned int *nr_segs)
  *
  * Split a bio into two bios, chains the two bios, submit the second half and
  * store a pointer to the first half in *@bio. Since this function may allocate
- * a new bio from @bio->bi_disk->queue->bio_split, it is the responsibility of
- * the caller to ensure that @bio->bi_disk->queue->bio_split is only released
- * after processing of the split bio has finished.
+ * a new bio from q->bio_split, it is the responsibility of the caller to ensure
+ * that q->bio_split is only released after processing of the split bio has
+ * finished.
  */
 void blk_queue_split(struct bio **bio)
 {
@@ -866,7 +865,7 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
 		return false;
 
 	/* must be same device */
-	if (rq->rq_disk != bio->bi_disk)
+	if (rq->rq_disk != bio->bi_bdev->bd_disk)
 		return false;
 
 	/* only merge integrity protected bio into ditto rq */
diff --git a/block/blk-mq.c b/block/blk-mq.c
index f285a9123a8b..74b17b396f4c 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2128,7 +2128,7 @@ static void blk_add_rq_to_plug(struct blk_plug *plug, struct request *rq)
  */
 blk_qc_t blk_mq_submit_bio(struct bio *bio)
 {
-	struct request_queue *q = bio->bi_disk->queue;
+	struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 	const int is_sync = op_is_sync(bio->bi_opf);
 	const int is_flush_fua = op_is_flush(bio->bi_opf);
 	struct blk_mq_alloc_data data = {
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index d52cac9f3a7c..b1b22d863bdf 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -2178,7 +2178,7 @@ static inline void throtl_update_latency_buckets(struct throtl_data *td)
 
 bool blk_throtl_bio(struct bio *bio)
 {
-	struct request_queue *q = bio->bi_disk->queue;
+	struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 	struct blkcg_gq *blkg = bio->bi_blkg;
 	struct throtl_qnode *qn = NULL;
 	struct throtl_grp *tg = blkg_to_tg(blkg);
diff --git a/block/blk.h b/block/blk.h
index 7550364c326c..10ab7c0d0766 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -202,8 +202,6 @@ static inline void elevator_exit(struct request_queue *q,
 	__elevator_exit(q, e);
 }
 
-struct block_device *__disk_get_part(struct gendisk *disk, int partno);
-
 ssize_t part_size_show(struct device *dev, struct device_attribute *attr,
 		char *buf);
 ssize_t part_stat_show(struct device *dev, struct device_attribute *attr,
diff --git a/block/bounce.c b/block/bounce.c
index d3f51acd6e3b..a22a8a1942b2 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -246,7 +246,7 @@ static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask,
 	bio = bio_alloc_bioset(gfp_mask, bio_segments(bio_src), bs);
 	if (!bio)
 		return NULL;
-	bio->bi_disk		= bio_src->bi_disk;
+	bio->bi_bdev		= bio_src->bi_bdev;
 	bio->bi_opf		= bio_src->bi_opf;
 	bio->bi_ioprio		= bio_src->bi_ioprio;
 	bio->bi_write_hint	= bio_src->bi_write_hint;
diff --git a/block/genhd.c b/block/genhd.c
index ca5d880af512..e536d0b4bbae 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -161,7 +161,7 @@ static void part_in_flight_rw(struct block_device *part,
 		inflight[1] = 0;
 }
 
-struct block_device *__disk_get_part(struct gendisk *disk, int partno)
+static struct block_device *__disk_get_part(struct gendisk *disk, int partno)
 {
 	struct disk_part_tbl *ptbl = rcu_dereference(disk->part_tbl);
 
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index c7c821419079..18bf99906662 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -284,7 +284,7 @@ out:
 
 static blk_qc_t brd_submit_bio(struct bio *bio)
 {
-	struct brd_device *brd = bio->bi_disk->private_data;
+	struct brd_device *brd = bio->bi_bdev->bd_disk->private_data;
 	sector_t sector = bio->bi_iter.bi_sector;
 	struct bio_vec bvec;
 	struct bvec_iter iter;
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 8f879e5c2f67..b2c93a29c251 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1579,8 +1579,8 @@ static inline void drbd_submit_bio_noacct(struct drbd_device *device,
 					     int fault_type, struct bio *bio)
 {
 	__release(local);
-	if (!bio->bi_disk) {
-		drbd_err(device, "drbd_submit_bio_noacct: bio->bi_disk == NULL\n");
+	if (!bio->bi_bdev) {
+		drbd_err(device, "drbd_submit_bio_noacct: bio->bi_bdev == NULL\n");
 		bio->bi_status = BLK_STS_IOERR;
 		bio_endio(bio);
 		return;
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 330f851cb8f0..ea0f31ab3343 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -1595,7 +1595,7 @@ void do_submit(struct work_struct *ws)
 
 blk_qc_t drbd_submit_bio(struct bio *bio)
 {
-	struct drbd_device *device = bio->bi_disk->private_data;
+	struct drbd_device *device = bio->bi_bdev->bd_disk->private_data;
 	unsigned long start_jif;
 
 	blk_queue_split(&bio);
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index 5357c3a4a36f..d6c821d48090 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1420,7 +1420,7 @@ static blk_qc_t null_submit_bio(struct bio *bio)
 {
 	sector_t sector = bio->bi_iter.bi_sector;
 	sector_t nr_sectors = bio_sectors(bio);
-	struct nullb *nullb = bio->bi_disk->private_data;
+	struct nullb *nullb = bio->bi_bdev->bd_disk->private_data;
 	struct nullb_queue *nq = nullb_to_queue(nullb);
 	struct nullb_cmd *cmd;
 
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index b8bb8ec7538d..658a0981cb54 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2374,7 +2374,7 @@ static blk_qc_t pkt_submit_bio(struct bio *bio)
 
 	blk_queue_split(&bio);
 
-	pd = bio->bi_disk->queue->queuedata;
+	pd = bio->bi_bdev->bd_disk->queue->queuedata;
 	if (!pd) {
 		pr_err("%s incorrect request queue\n", bio_devname(bio, b));
 		goto end_io;
@@ -2418,7 +2418,7 @@ static blk_qc_t pkt_submit_bio(struct bio *bio)
 			split = bio;
 		}
 
-		pkt_make_request_write(bio->bi_disk->queue, split);
+		pkt_make_request_write(bio->bi_bdev->bd_disk->queue, split);
 	} while (split != bio);
 
 	return BLK_QC_T_NONE;
diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
index b71d28372ef3..1d738999fb69 100644
--- a/drivers/block/ps3vram.c
+++ b/drivers/block/ps3vram.c
@@ -581,7 +581,7 @@ out:
 
 static blk_qc_t ps3vram_submit_bio(struct bio *bio)
 {
-	struct ps3_system_bus_device *dev = bio->bi_disk->private_data;
+	struct ps3_system_bus_device *dev = bio->bi_bdev->bd_disk->private_data;
 	struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 	int busy;
 
diff --git a/drivers/block/rsxx/dev.c b/drivers/block/rsxx/dev.c
index edacefff6e35..9a28322a8cd8 100644
--- a/drivers/block/rsxx/dev.c
+++ b/drivers/block/rsxx/dev.c
@@ -122,7 +122,7 @@ static void bio_dma_done_cb(struct rsxx_cardinfo *card,
 
 static blk_qc_t rsxx_submit_bio(struct bio *bio)
 {
-	struct rsxx_cardinfo *card = bio->bi_disk->private_data;
+	struct rsxx_cardinfo *card = bio->bi_bdev->bd_disk->private_data;
 	struct rsxx_bio_meta *bio_meta;
 	blk_status_t st = BLK_STS_IOERR;
 
diff --git a/drivers/block/umem.c b/drivers/block/umem.c
index 2b95d7b33b91..982732dbe82e 100644
--- a/drivers/block/umem.c
+++ b/drivers/block/umem.c
@@ -521,7 +521,7 @@ static int mm_check_plugged(struct cardinfo *card)
 
 static blk_qc_t mm_submit_bio(struct bio *bio)
 {
-	struct cardinfo *card = bio->bi_disk->private_data;
+	struct cardinfo *card = bio->bi_bdev->bd_disk->private_data;
 
 	pr_debug("mm_make_request %llu %u\n",
 		 (unsigned long long)bio->bi_iter.bi_sector,
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index e2933cb7a82a..d6243dbc53cc 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -1596,7 +1596,7 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
  */
 static blk_qc_t zram_submit_bio(struct bio *bio)
 {
-	struct zram *zram = bio->bi_disk->private_data;
+	struct zram *zram = bio->bi_bdev->bd_disk->private_data;
 
 	if (!valid_io_request(zram, bio->bi_iter.bi_sector,
 					bio->bi_iter.bi_size)) {
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index b6246f73895c..5924f09c217b 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -49,7 +49,7 @@ struct bio_set pblk_bio_set;
 
 static blk_qc_t pblk_submit_bio(struct bio *bio)
 {
-	struct pblk *pblk = bio->bi_disk->queue->queuedata;
+	struct pblk *pblk = bio->bi_bdev->bd_disk->queue->queuedata;
 
 	if (bio_op(bio) == REQ_OP_DISCARD) {
 		pblk_discard(pblk, bio);
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index b00fd08d696b..058dd8014428 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -114,7 +114,7 @@ void bch_data_verify(struct cached_dev *dc, struct bio *bio)
 	check = bio_kmalloc(GFP_NOIO, bio_segments(bio));
 	if (!check)
 		return;
-	check->bi_disk = bio->bi_disk;
+	check->bi_bdev = bio->bi_bdev;
 	check->bi_opf = REQ_OP_READ;
 	check->bi_iter.bi_sector = bio->bi_iter.bi_sector;
 	check->bi_iter.bi_size = bio->bi_iter.bi_size;
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 85b1f2a9b72d..dfc35d6d05ed 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -894,7 +894,8 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
 	    !(bio->bi_opf & (REQ_META|REQ_PRIO)) &&
 	    s->iop.c->gc_stats.in_use < CUTOFF_CACHE_READA)
 		reada = min_t(sector_t, dc->readahead >> 9,
-			      get_capacity(bio->bi_disk) - bio_end_sector(bio));
+			      get_capacity(bio->bi_bdev->bd_disk) -
+			      bio_end_sector(bio));
 
 	s->insert_bio_sectors = min(sectors, bio_sectors(bio) + reada);
 
@@ -1167,7 +1168,7 @@ static void quit_max_writeback_rate(struct cache_set *c,
 blk_qc_t cached_dev_submit_bio(struct bio *bio)
 {
 	struct search *s;
-	struct bcache_device *d = bio->bi_disk->private_data;
+	struct bcache_device *d = bio->bi_bdev->bd_disk->private_data;
 	struct cached_dev *dc = container_of(d, struct cached_dev, disk);
 	int rw = bio_data_dir(bio);
 
@@ -1274,7 +1275,7 @@ blk_qc_t flash_dev_submit_bio(struct bio *bio)
 {
 	struct search *s;
 	struct closure *cl;
-	struct bcache_device *d = bio->bi_disk->private_data;
+	struct bcache_device *d = bio->bi_bdev->bd_disk->private_data;
 
 	if (unlikely(d->c && test_bit(CACHE_SET_IO_DISABLE, &d->c->flags))) {
 		bio->bi_status = BLK_STS_IOERR;
diff --git a/drivers/md/dm-bio-record.h b/drivers/md/dm-bio-record.h
index 2ea0360108e1..a3b71350eec8 100644
--- a/drivers/md/dm-bio-record.h
+++ b/drivers/md/dm-bio-record.h
@@ -18,8 +18,7 @@
  */
 
 struct dm_bio_details {
-	struct gendisk *bi_disk;
-	u8 bi_partno;
+	struct block_device *bi_bdev;
 	int __bi_remaining;
 	unsigned long bi_flags;
 	struct bvec_iter bi_iter;
@@ -31,8 +30,7 @@ struct dm_bio_details {
 
 static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
 {
-	bd->bi_disk = bio->bi_disk;
-	bd->bi_partno = bio->bi_partno;
+	bd->bi_bdev = bio->bi_bdev;
 	bd->bi_flags = bio->bi_flags;
 	bd->bi_iter = bio->bi_iter;
 	bd->__bi_remaining = atomic_read(&bio->__bi_remaining);
@@ -44,8 +42,7 @@ static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
 
 static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
 {
-	bio->bi_disk = bd->bi_disk;
-	bio->bi_partno = bd->bi_partno;
+	bio->bi_bdev = bd->bi_bdev;
 	bio->bi_flags = bd->bi_flags;
 	bio->bi_iter = bd->bi_iter;
 	atomic_set(&bio->__bi_remaining, bd->__bi_remaining);
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index fa09bc4e4c54..b0a82f29a2e4 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -145,7 +145,7 @@ static void dispatch_bios(void *context, struct bio_list *bio_list)
 
 struct dm_raid1_bio_record {
 	struct mirror *m;
-	/* if details->bi_disk == NULL, details were not saved */
+	/* if details->bi_bdev == NULL, details were not saved */
 	struct dm_bio_details details;
 	region_t write_region;
 };
@@ -1190,7 +1190,7 @@ static int mirror_map(struct dm_target *ti, struct bio *bio)
 	struct dm_raid1_bio_record *bio_record =
 	  dm_per_bio_data(bio, sizeof(struct dm_raid1_bio_record));
 
-	bio_record->details.bi_disk = NULL;
+	bio_record->details.bi_bdev = NULL;
 
 	if (rw == WRITE) {
 		/* Save region for mirror_end_io() handler */
@@ -1257,7 +1257,7 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio,
 		goto out;
 
 	if (unlikely(*error)) {
-		if (!bio_record->details.bi_disk) {
+		if (!bio_record->details.bi_bdev) {
 			/*
 			 * There wasn't enough memory to record necessary
 			 * information for a retry or there was no other
@@ -1282,7 +1282,7 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio,
 			bd = &bio_record->details;
 
 			dm_bio_restore(bd, bio);
-			bio_record->details.bi_disk = NULL;
+			bio_record->details.bi_bdev = NULL;
 			bio->bi_status = 0;
 
 			queue_bio(ms, bio, rw);
@@ -1292,7 +1292,7 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio,
 	}
 
 out:
-	bio_record->details.bi_disk = NULL;
+	bio_record->details.bi_bdev = NULL;
 
 	return DM_ENDIO_DONE;
 }
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 7bac564f3faa..479ec5bea09e 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -977,16 +977,17 @@ static void clone_endio(struct bio *bio)
 	struct mapped_device *md = tio->io->md;
 	dm_endio_fn endio = tio->ti->type->end_io;
 	struct bio *orig_bio = io->orig_bio;
+	struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 
 	if (unlikely(error == BLK_STS_TARGET)) {
 		if (bio_op(bio) == REQ_OP_DISCARD &&
-		    !bio->bi_disk->queue->limits.max_discard_sectors)
+		    !q->limits.max_discard_sectors)
 			disable_discard(md);
 		else if (bio_op(bio) == REQ_OP_WRITE_SAME &&
-			 !bio->bi_disk->queue->limits.max_write_same_sectors)
+			 !q->limits.max_write_same_sectors)
 			disable_write_same(md);
 		else if (bio_op(bio) == REQ_OP_WRITE_ZEROES &&
-			 !bio->bi_disk->queue->limits.max_write_zeroes_sectors)
+			 !q->limits.max_write_zeroes_sectors)
 			disable_write_zeroes(md);
 	}
 
@@ -996,7 +997,7 @@ static void clone_endio(struct bio *bio)
 	 */
 	if (bio_op(orig_bio) == REQ_OP_ZONE_APPEND) {
 		sector_t written_sector = bio->bi_iter.bi_sector;
-		struct request_queue *q = orig_bio->bi_disk->queue;
+		struct request_queue *q = orig_bio->bi_bdev->bd_disk->queue;
 		u64 mask = (u64)blk_queue_zone_sectors(q) - 1;
 
 		orig_bio->bi_iter.bi_sector += written_sector & mask;
@@ -1422,8 +1423,7 @@ static int __send_empty_flush(struct clone_info *ci)
 	 */
 	bio_init(&flush_bio, NULL, 0);
 	flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
-	flush_bio.bi_disk = ci->io->md->disk;
-	bio_associate_blkg(&flush_bio);
+	bio_set_dev(&flush_bio, ci->io->md->disk->part0);
 
 	ci->bio = &flush_bio;
 	ci->sector_count = 0;
@@ -1626,7 +1626,7 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md,
 
 static blk_qc_t dm_submit_bio(struct bio *bio)
 {
-	struct mapped_device *md = bio->bi_disk->private_data;
+	struct mapped_device *md = bio->bi_bdev->bd_disk->private_data;
 	blk_qc_t ret = BLK_QC_T_NONE;
 	int srcu_idx;
 	struct dm_table *map;
diff --git a/drivers/md/md-linear.c b/drivers/md/md-linear.c
index 68cac7d19278..63ed8329a98d 100644
--- a/drivers/md/md-linear.c
+++ b/drivers/md/md-linear.c
@@ -252,7 +252,7 @@ static bool linear_make_request(struct mddev *mddev, struct bio *bio)
 		start_sector + data_offset;
 
 	if (unlikely((bio_op(bio) == REQ_OP_DISCARD) &&
-		     !blk_queue_discard(bio->bi_disk->queue))) {
+		     !blk_queue_discard(bio->bi_bdev->bd_disk->queue))) {
 		/* Just ignore it */
 		bio_endio(bio);
 	} else {
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 04384452a7ab..cf06dbb1aa53 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -486,7 +486,7 @@ static void md_end_io(struct bio *bio)
 static blk_qc_t md_submit_bio(struct bio *bio)
 {
 	const int rw = bio_data_dir(bio);
-	struct mddev *mddev = bio->bi_disk->private_data;
+	struct mddev *mddev = bio->bi_bdev->bd_disk->private_data;
 
 	if (mddev == NULL || mddev->pers == NULL) {
 		bio_io_error(bio);
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 34070ab30a8a..f13290ccc1c2 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -556,7 +556,7 @@ static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sect
 
 static inline void md_sync_acct_bio(struct bio *bio, unsigned long nr_sectors)
 {
-	atomic_add(nr_sectors, &bio->bi_disk->sync_io);
+	md_sync_acct(bio->bi_bdev, nr_sectors);
 }
 
 struct md_personality
@@ -793,14 +793,14 @@ static inline void mddev_clear_unsupported_flags(struct mddev *mddev,
 static inline void mddev_check_writesame(struct mddev *mddev, struct bio *bio)
 {
 	if (bio_op(bio) == REQ_OP_WRITE_SAME &&
-	    !bio->bi_disk->queue->limits.max_write_same_sectors)
+	    !bio->bi_bdev->bd_disk->queue->limits.max_write_same_sectors)
 		mddev->queue->limits.max_write_same_sectors = 0;
 }
 
 static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio)
 {
 	if (bio_op(bio) == REQ_OP_WRITE_ZEROES &&
-	    !bio->bi_disk->queue->limits.max_write_zeroes_sectors)
+	    !bio->bi_bdev->bd_disk->queue->limits.max_write_zeroes_sectors)
 		mddev->queue->limits.max_write_zeroes_sectors = 0;
 }
 
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index c0347997f6ff..3b19141cdb4b 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -794,13 +794,13 @@ static void flush_bio_list(struct r1conf *conf, struct bio *bio)
 
 	while (bio) { /* submit pending writes */
 		struct bio *next = bio->bi_next;
-		struct md_rdev *rdev = (void *)bio->bi_disk;
+		struct md_rdev *rdev = (void *)bio->bi_bdev;
 		bio->bi_next = NULL;
 		bio_set_dev(bio, rdev->bdev);
 		if (test_bit(Faulty, &rdev->flags)) {
 			bio_io_error(bio);
 		} else if (unlikely((bio_op(bio) == REQ_OP_DISCARD) &&
-				    !blk_queue_discard(bio->bi_disk->queue)))
+				    !blk_queue_discard(bio->bi_bdev->bd_disk->queue)))
 			/* Just ignore it */
 			bio_endio(bio);
 		else
@@ -1520,7 +1520,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 			trace_block_bio_remap(mbio, disk_devt(mddev->gendisk),
 					      r1_bio->sector);
 		/* flush_pending_writes() needs access to the rdev so...*/
-		mbio->bi_disk = (void *)conf->mirrors[i].rdev;
+		mbio->bi_bdev = (void *)conf->mirrors[i].rdev;
 
 		cb = blk_check_plugged(raid1_unplug, mddev, sizeof(*plug));
 		if (cb)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index c5d88ef6a45c..be8f14afb6d1 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -882,13 +882,13 @@ static void flush_pending_writes(struct r10conf *conf)
 
 		while (bio) { /* submit pending writes */
 			struct bio *next = bio->bi_next;
-			struct md_rdev *rdev = (void*)bio->bi_disk;
+			struct md_rdev *rdev = (void*)bio->bi_bdev;
 			bio->bi_next = NULL;
 			bio_set_dev(bio, rdev->bdev);
 			if (test_bit(Faulty, &rdev->flags)) {
 				bio_io_error(bio);
 			} else if (unlikely((bio_op(bio) ==  REQ_OP_DISCARD) &&
-					    !blk_queue_discard(bio->bi_disk->queue)))
+					    !blk_queue_discard(bio->bi_bdev->bd_disk->queue)))
 				/* Just ignore it */
 				bio_endio(bio);
 			else
@@ -1075,13 +1075,13 @@ static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)
 
 	while (bio) { /* submit pending writes */
 		struct bio *next = bio->bi_next;
-		struct md_rdev *rdev = (void*)bio->bi_disk;
+		struct md_rdev *rdev = (void*)bio->bi_bdev;
 		bio->bi_next = NULL;
 		bio_set_dev(bio, rdev->bdev);
 		if (test_bit(Faulty, &rdev->flags)) {
 			bio_io_error(bio);
 		} else if (unlikely((bio_op(bio) ==  REQ_OP_DISCARD) &&
-				    !blk_queue_discard(bio->bi_disk->queue)))
+				    !blk_queue_discard(bio->bi_bdev->bd_disk->queue)))
 			/* Just ignore it */
 			bio_endio(bio);
 		else
@@ -1253,7 +1253,7 @@ static void raid10_write_one_disk(struct mddev *mddev, struct r10bio *r10_bio,
 		trace_block_bio_remap(mbio, disk_devt(conf->mddev->gendisk),
 				      r10_bio->sector);
 	/* flush_pending_writes() needs access to the rdev so...*/
-	mbio->bi_disk = (void *)rdev;
+	mbio->bi_bdev = (void *)rdev;
 
 	atomic_inc(&r10_bio->remaining);
 
@@ -3003,7 +3003,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 
 	/* Again, very different code for resync and recovery.
 	 * Both must result in an r10bio with a list of bios that
-	 * have bi_end_io, bi_sector, bi_disk set,
+	 * have bi_end_io, bi_sector, bi_bdev set,
 	 * and bi_private set to the r10bio.
 	 * For recovery, we may actually create several r10bios
 	 * with 2 bios in each, that correspond to the bios in the main one.
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 3a90cc0e43ca..f411b9e5c332 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5310,7 +5310,7 @@ static int in_chunk_boundary(struct mddev *mddev, struct bio *bio)
 	unsigned int chunk_sectors;
 	unsigned int bio_sectors = bio_sectors(bio);
 
-	WARN_ON_ONCE(bio->bi_partno);
+	WARN_ON_ONCE(bio->bi_bdev->bd_partno);
 
 	chunk_sectors = min(conf->chunk_sectors, conf->prev_chunk_sectors);
 	return  chunk_sectors >=
diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c
index 22e5617b2cea..e03a1f38d750 100644
--- a/drivers/nvdimm/blk.c
+++ b/drivers/nvdimm/blk.c
@@ -165,7 +165,7 @@ static int nsblk_do_bvec(struct nd_namespace_blk *nsblk,
 static blk_qc_t nd_blk_submit_bio(struct bio *bio)
 {
 	struct bio_integrity_payload *bip;
-	struct nd_namespace_blk *nsblk = bio->bi_disk->private_data;
+	struct nd_namespace_blk *nsblk = bio->bi_bdev->bd_disk->private_data;
 	struct bvec_iter iter;
 	unsigned long start;
 	struct bio_vec bvec;
@@ -177,7 +177,7 @@ static blk_qc_t nd_blk_submit_bio(struct bio *bio)
 
 	bip = bio_integrity(bio);
 	rw = bio_data_dir(bio);
-	do_acct = blk_queue_io_stat(bio->bi_disk->queue);
+	do_acct = blk_queue_io_stat(bio->bi_bdev->bd_disk->queue);
 	if (do_acct)
 		start = bio_start_io_acct(bio);
 	bio_for_each_segment(bvec, bio, iter) {
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 12ff6f8784ac..41aa1f01fc07 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -1442,7 +1442,7 @@ static int btt_do_bvec(struct btt *btt, struct bio_integrity_payload *bip,
 static blk_qc_t btt_submit_bio(struct bio *bio)
 {
 	struct bio_integrity_payload *bip = bio_integrity(bio);
-	struct btt *btt = bio->bi_disk->private_data;
+	struct btt *btt = bio->bi_bdev->bd_disk->private_data;
 	struct bvec_iter iter;
 	unsigned long start;
 	struct bio_vec bvec;
@@ -1452,7 +1452,7 @@ static blk_qc_t btt_submit_bio(struct bio *bio)
 	if (!bio_integrity_prep(bio))
 		return BLK_QC_T_NONE;
 
-	do_acct = blk_queue_io_stat(bio->bi_disk->queue);
+	do_acct = blk_queue_io_stat(bio->bi_bdev->bd_disk->queue);
 	if (do_acct)
 		start = bio_start_io_acct(bio);
 	bio_for_each_segment(bvec, bio, iter) {
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 875076b0ea6c..72740835c85c 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -197,13 +197,13 @@ static blk_qc_t pmem_submit_bio(struct bio *bio)
 	unsigned long start;
 	struct bio_vec bvec;
 	struct bvec_iter iter;
-	struct pmem_device *pmem = bio->bi_disk->private_data;
+	struct pmem_device *pmem = bio->bi_bdev->bd_disk->private_data;
 	struct nd_region *nd_region = to_region(pmem);
 
 	if (bio->bi_opf & REQ_PREFLUSH)
 		ret = nvdimm_flush(nd_region, bio);
 
-	do_acct = blk_queue_io_stat(bio->bi_disk->queue);
+	do_acct = blk_queue_io_stat(bio->bi_bdev->bd_disk->queue);
 	if (do_acct)
 		start = bio_start_io_acct(bio);
 	bio_for_each_segment(bvec, bio, iter) {
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 566788ba4e7d..a39befb4deba 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1113,7 +1113,7 @@ static int nvme_submit_user_cmd(struct request_queue *q,
 {
 	bool write = nvme_is_write(cmd);
 	struct nvme_ns *ns = q->queuedata;
-	struct gendisk *disk = ns ? ns->disk : NULL;
+	struct block_device *bdev = ns ? ns->disk->part0 : NULL;
 	struct request *req;
 	struct bio *bio = NULL;
 	void *meta = NULL;
@@ -1133,8 +1133,8 @@ static int nvme_submit_user_cmd(struct request_queue *q,
 		if (ret)
 			goto out;
 		bio = req->bio;
-		bio->bi_disk = disk;
-		if (disk && meta_buffer && meta_len) {
+		bio->bi_bdev = bdev;
+		if (bdev && meta_buffer && meta_len) {
 			meta = nvme_add_user_metadata(bio, meta_buffer, meta_len,
 					meta_seed, write);
 			if (IS_ERR(meta)) {
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 470cef3abec3..6c8eab8de288 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -757,7 +757,6 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
 {
 	bool write = nvme_is_write((struct nvme_command *)vcmd);
 	struct nvm_dev *dev = ns->ndev;
-	struct gendisk *disk = ns->disk;
 	struct request *rq;
 	struct bio *bio = NULL;
 	__le64 *ppa_list = NULL;
@@ -817,7 +816,7 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
 			vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma);
 		}
 
-		bio->bi_disk = disk;
+		bio->bi_bdev = ns->disk->part0;
 	}
 
 	blk_execute_rq(q, NULL, rq, 0);
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 9ac762b28811..a6d44e7a775f 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -296,7 +296,7 @@ static bool nvme_available_path(struct nvme_ns_head *head)
 
 blk_qc_t nvme_ns_head_submit_bio(struct bio *bio)
 {
-	struct nvme_ns_head *head = bio->bi_disk->private_data;
+	struct nvme_ns_head *head = bio->bi_bdev->bd_disk->private_data;
 	struct device *dev = disk_to_dev(head->disk);
 	struct nvme_ns *ns;
 	blk_qc_t ret = BLK_QC_T_NONE;
@@ -312,7 +312,7 @@ blk_qc_t nvme_ns_head_submit_bio(struct bio *bio)
 	srcu_idx = srcu_read_lock(&head->srcu);
 	ns = nvme_find_path(head);
 	if (likely(ns)) {
-		bio->bi_disk = ns->disk;
+		bio->bi_bdev = ns->disk->part0;
 		bio->bi_opf |= REQ_NVME_MPATH;
 		trace_block_bio_remap(bio, disk_devt(ns->head->disk),
 				      bio->bi_iter.bi_sector);
@@ -352,7 +352,7 @@ static void nvme_requeue_work(struct work_struct *work)
 		 * Reset disk to the mpath node and resubmit to select a new
 		 * path.
 		 */
-		bio->bi_disk = head->disk;
+		bio->bi_bdev = head->disk->part0;
 		submit_bio_noacct(bio);
 	}
 }
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index b7ce4f221d99..f5ef3edeb2fd 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1468,7 +1468,7 @@ static int nvme_rdma_map_sg_pi(struct nvme_rdma_queue *queue,
 	if (unlikely(nr))
 		goto mr_put;
 
-	nvme_rdma_set_sig_attrs(blk_get_integrity(bio->bi_disk), c,
+	nvme_rdma_set_sig_attrs(blk_get_integrity(bio->bi_bdev->bd_disk), c,
 				req->mr->sig_attrs, ns->pi_type);
 	nvme_rdma_set_prot_checks(c, &req->mr->sig_attrs->check_mask);
 
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 5c5cff3f2374..da33cb4cba28 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -879,7 +879,7 @@ dcssblk_submit_bio(struct bio *bio)
 	blk_queue_split(&bio);
 
 	bytes_done = 0;
-	dev_info = bio->bi_disk->private_data;
+	dev_info = bio->bi_bdev->bd_disk->private_data;
 	if (dev_info == NULL)
 		goto fail;
 	if ((bio->bi_iter.bi_sector & 7) != 0 ||
diff --git a/drivers/s390/block/xpram.c b/drivers/s390/block/xpram.c
index c2536f7767b3..d1ed39162943 100644
--- a/drivers/s390/block/xpram.c
+++ b/drivers/s390/block/xpram.c
@@ -184,7 +184,7 @@ static unsigned long xpram_highest_page_index(void)
  */
 static blk_qc_t xpram_submit_bio(struct bio *bio)
 {
-	xpram_device_t *xdev = bio->bi_disk->private_data;
+	xpram_device_t *xdev = bio->bi_bdev->bd_disk->private_data;
 	struct bio_vec bvec;
 	struct bvec_iter iter;
 	unsigned int index;
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 6ff44e53814c..113cb85c1fd4 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -2674,7 +2674,7 @@ static void __btrfsic_submit_bio(struct bio *bio)
 	mutex_lock(&btrfsic_mutex);
 	/* since btrfsic_submit_bio() is also called before
 	 * btrfsic_mount(), this might return NULL */
-	dev_state = btrfsic_dev_state_lookup(bio_dev(bio) + bio->bi_partno);
+	dev_state = btrfsic_dev_state_lookup(bio->bi_bdev->bd_dev);
 	if (NULL != dev_state &&
 	    (bio_op(bio) == REQ_OP_WRITE) && bio_has_data(bio)) {
 		unsigned int i = 0;
@@ -2690,9 +2690,9 @@ static void __btrfsic_submit_bio(struct bio *bio)
 		bio_is_patched = 0;
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			pr_info("submit_bio(rw=%d,0x%x, bi_vcnt=%u, bi_sector=%llu (bytenr %llu), bi_disk=%p)\n",
+			pr_info("submit_bio(rw=%d,0x%x, bi_vcnt=%u, bi_sector=%llu (bytenr %llu), bi_bdev=%p)\n",
 			       bio_op(bio), bio->bi_opf, segs,
-			       bio->bi_iter.bi_sector, dev_bytenr, bio->bi_disk);
+			       bio->bi_iter.bi_sector, dev_bytenr, bio->bi_bdev);
 
 		mapped_datav = kmalloc_array(segs,
 					     sizeof(*mapped_datav), GFP_NOFS);
@@ -2721,8 +2721,8 @@ static void __btrfsic_submit_bio(struct bio *bio)
 	} else if (NULL != dev_state && (bio->bi_opf & REQ_PREFLUSH)) {
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
-			pr_info("submit_bio(rw=%d,0x%x FLUSH, disk=%p)\n",
-			       bio_op(bio), bio->bi_opf, bio->bi_disk);
+			pr_info("submit_bio(rw=%d,0x%x FLUSH, bdev=%p)\n",
+			       bio_op(bio), bio->bi_opf, bio->bi_bdev);
 		if (!dev_state->dummy_block_for_bio_bh_flush.is_iodone) {
 			if ((dev_state->state->print_mask &
 			     (BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH |
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 93fbf87bdc8d..b2204a2942cb 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -1105,8 +1105,7 @@ static int rbio_add_io_page(struct btrfs_raid_bio *rbio,
 		 * devices or if they are not contiguous
 		 */
 		if (last_end == disk_start && !last->bi_status &&
-		    last->bi_disk == stripe->dev->bdev->bd_disk &&
-		    last->bi_partno == stripe->dev->bdev->bd_partno) {
+		    last->bi_bdev == stripe->dev->bdev) {
 			ret = bio_add_page(last, page, PAGE_SIZE, 0);
 			if (ret == PAGE_SIZE)
 				return 0;
@@ -1357,9 +1356,7 @@ static int find_bio_stripe(struct btrfs_raid_bio *rbio,
 	for (i = 0; i < rbio->bbio->num_stripes; i++) {
 		stripe = &rbio->bbio->stripes[i];
 		if (in_range(physical, stripe->physical, rbio->stripe_len) &&
-		    stripe->dev->bdev &&
-		    bio->bi_disk == stripe->dev->bdev->bd_disk &&
-		    bio->bi_partno == stripe->dev->bdev->bd_partno) {
+		    stripe->dev->bdev && bio->bi_bdev == stripe->dev->bdev) {
 			return i;
 		}
 	}
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 5f4f88a4d2c8..33f8f0f108bf 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1695,7 +1695,7 @@ static void scrub_wr_submit(struct scrub_ctx *sctx)
 
 	sbio = sctx->wr_curr_bio;
 	sctx->wr_curr_bio = NULL;
-	WARN_ON(!sbio->bio->bi_disk);
+	WARN_ON(!sbio->bio->bi_bdev);
 	scrub_pending_bio_inc(sctx);
 	/* process all writes in a single worker thread. Then the block layer
 	 * orders the requests before sending them to the driver which
diff --git a/fs/direct-io.c b/fs/direct-io.c
index d53fa92a1ab6..2660e744da2d 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -434,7 +434,7 @@ static inline void dio_bio_submit(struct dio *dio, struct dio_submit *sdio)
 	if (dio->is_async && dio->op == REQ_OP_READ && dio->should_dirty)
 		bio_set_pages_dirty(bio);
 
-	dio->bio_disk = bio->bi_disk;
+	dio->bio_disk = bio->bi_bdev->bd_disk;
 
 	if (sdio->submit_io) {
 		sdio->submit_io(bio, dio->inode, sdio->logical_offset_in_bio);
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index aa34d620bec9..8cbf03159752 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -427,16 +427,6 @@ int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
 	return 0;
 }
 
-/*
- * Return true, if pre_bio's bdev is same as its target device.
- */
-static bool __same_bdev(struct f2fs_sb_info *sbi,
-				block_t blk_addr, struct bio *bio)
-{
-	struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
-	return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
-}
-
 static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
 {
 	struct f2fs_sb_info *sbi = fio->sbi;
@@ -741,7 +731,7 @@ static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
 		return false;
 	if (last_blkaddr + 1 != cur_blkaddr)
 		return false;
-	return __same_bdev(sbi, cur_blkaddr, bio);
+	return bio->bi_bdev == f2fs_target_device(sbi, cur_blkaddr, NULL);
 }
 
 static bool io_type_is_mergeable(struct f2fs_bio_info *io,
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 1edda614f7ce..12af7aa5db37 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -483,24 +483,22 @@ extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int);
 extern unsigned int bvec_nr_vecs(unsigned short idx);
 extern const char *bio_devname(struct bio *bio, char *buffer);
 
-#define bio_set_dev(bio, bdev) 			\
-do {						\
-	if ((bio)->bi_disk != (bdev)->bd_disk)	\
-		bio_clear_flag(bio, BIO_THROTTLED);\
-	(bio)->bi_disk = (bdev)->bd_disk;	\
-	(bio)->bi_partno = (bdev)->bd_partno;	\
-	bio_associate_blkg(bio);		\
+#define bio_set_dev(bio, bdev) 				\
+do {							\
+	if ((bio)->bi_bdev != (bdev))			\
+		bio_clear_flag(bio, BIO_THROTTLED);	\
+	(bio)->bi_bdev = (bdev);			\
+	bio_associate_blkg(bio);			\
 } while (0)
 
 #define bio_copy_dev(dst, src)			\
 do {						\
-	(dst)->bi_disk = (src)->bi_disk;	\
-	(dst)->bi_partno = (src)->bi_partno;	\
+	(dst)->bi_bdev = (src)->bi_bdev;	\
 	bio_clone_blkg_association(dst, src);	\
 } while (0)
 
 #define bio_dev(bio) \
-	disk_devt((bio)->bi_disk)
+	disk_devt((bio)->bi_bdev->bd_disk)
 
 #ifdef CONFIG_BLK_CGROUP
 void bio_associate_blkg(struct bio *bio);
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index d705b174d346..6b410dab48ee 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -602,8 +602,8 @@ static inline void blk_rq_bio_prep(struct request *rq, struct bio *bio,
 	rq->bio = rq->biotail = bio;
 	rq->ioprio = bio_prio(bio);
 
-	if (bio->bi_disk)
-		rq->rq_disk = bio->bi_disk;
+	if (bio->bi_bdev)
+		rq->rq_disk = bio->bi_bdev->bd_disk;
 }
 
 blk_qc_t blk_mq_submit_bio(struct bio *bio);
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 866f74261b3b..8ebd8be3e050 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -222,7 +222,7 @@ static inline void bio_issue_init(struct bio_issue *issue,
  */
 struct bio {
 	struct bio		*bi_next;	/* request queue link */
-	struct gendisk		*bi_disk;
+	struct block_device	*bi_bdev;
 	unsigned int		bi_opf;		/* bottom bits req flags,
 						 * top bits REQ_OP. Use
 						 * accessors.
@@ -231,7 +231,6 @@ struct bio {
 	unsigned short		bi_ioprio;
 	unsigned short		bi_write_hint;
 	blk_status_t		bi_status;
-	u8			bi_partno;
 	atomic_t		__bi_remaining;
 
 	struct bvec_iter	bi_iter;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index f94ee3089e01..b55bd534b2e1 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1967,7 +1967,8 @@ void part_end_io_acct(struct block_device *part, struct bio *bio,
  */
 static inline unsigned long bio_start_io_acct(struct bio *bio)
 {
-	return disk_start_io_acct(bio->bi_disk, bio_sectors(bio), bio_op(bio));
+	return disk_start_io_acct(bio->bi_bdev->bd_disk, bio_sectors(bio),
+				  bio_op(bio));
 }
 
 /**
@@ -1977,7 +1978,7 @@ static inline unsigned long bio_start_io_acct(struct bio *bio)
  */
 static inline void bio_end_io_acct(struct bio *bio, unsigned long start_time)
 {
-	return disk_end_io_acct(bio->bi_disk, bio_op(bio), start_time);
+	return disk_end_io_acct(bio->bi_bdev->bd_disk, bio_op(bio), start_time);
 }
 
 int bdev_read_only(struct block_device *bdev);
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index fb0fe4c66b84..9e9ee4945043 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -903,7 +903,7 @@ static void blk_add_trace_bio(struct request_queue *q, struct bio *bio,
 
 static void blk_add_trace_bio_bounce(void *ignore, struct bio *bio)
 {
-	blk_add_trace_bio(bio->bi_disk->queue, bio, BLK_TA_BOUNCE, 0);
+	blk_add_trace_bio(bio->bi_bdev->bd_disk->queue, bio, BLK_TA_BOUNCE, 0);
 }
 
 static void blk_add_trace_bio_complete(void *ignore,
@@ -915,22 +915,24 @@ static void blk_add_trace_bio_complete(void *ignore,
 
 static void blk_add_trace_bio_backmerge(void *ignore, struct bio *bio)
 {
-	blk_add_trace_bio(bio->bi_disk->queue, bio, BLK_TA_BACKMERGE, 0);
+	blk_add_trace_bio(bio->bi_bdev->bd_disk->queue, bio, BLK_TA_BACKMERGE,
+			0);
 }
 
 static void blk_add_trace_bio_frontmerge(void *ignore, struct bio *bio)
 {
-	blk_add_trace_bio(bio->bi_disk->queue, bio, BLK_TA_FRONTMERGE, 0);
+	blk_add_trace_bio(bio->bi_bdev->bd_disk->queue, bio, BLK_TA_FRONTMERGE,
+			0);
 }
 
 static void blk_add_trace_bio_queue(void *ignore, struct bio *bio)
 {
-	blk_add_trace_bio(bio->bi_disk->queue, bio, BLK_TA_QUEUE, 0);
+	blk_add_trace_bio(bio->bi_bdev->bd_disk->queue, bio, BLK_TA_QUEUE, 0);
 }
 
 static void blk_add_trace_getrq(void *ignore, struct bio *bio)
 {
-	blk_add_trace_bio(bio->bi_disk->queue, bio, BLK_TA_GETRQ, 0);
+	blk_add_trace_bio(bio->bi_bdev->bd_disk->queue, bio, BLK_TA_GETRQ, 0);
 }
 
 static void blk_add_trace_plug(void *ignore, struct request_queue *q)
@@ -967,7 +969,7 @@ static void blk_add_trace_unplug(void *ignore, struct request_queue *q,
 
 static void blk_add_trace_split(void *ignore, struct bio *bio, unsigned int pdu)
 {
-	struct request_queue *q = bio->bi_disk->queue;
+	struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 	struct blk_trace *bt;
 
 	rcu_read_lock();
@@ -997,7 +999,7 @@ static void blk_add_trace_split(void *ignore, struct bio *bio, unsigned int pdu)
 static void blk_add_trace_bio_remap(void *ignore, struct bio *bio, dev_t dev,
 				    sector_t from)
 {
-	struct request_queue *q = bio->bi_disk->queue;
+	struct request_queue *q = bio->bi_bdev->bd_disk->queue;
 	struct blk_trace *bt;
 	struct blk_io_trace_remap r;
 
diff --git a/mm/page_io.c b/mm/page_io.c
index 9bca17ecc4df..a75f35464a4e 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -433,7 +433,7 @@ int swap_readpage(struct page *page, bool synchronous)
 		ret = -ENOMEM;
 		goto out;
 	}
-	disk = bio->bi_disk;
+	disk = bio->bi_bdev->bd_disk;
 	/*
 	 * Keep this task valid during swap readpage because the oom killer may
 	 * attempt to access it in the page fault retry time check.