don't require a struct block_device to submit a bio

don't require a struct block_device to submit a bio

[Christoph Hellwig]

Hi Jens,

this series removes the need to have a struct block_device ready to
submit a bio.   We basically don't use it anywhere in the block stack
anyway - we always go for the gendisk or request_queue.  The only
exception is partition remapping for which we'll now need an additional
partition index.  This helps with cases where we submit I/O from a
character device (nvme or lightnvm passthrough) or a different block
device (upcoming nvme multipath support).

[PATCH 1/6] btrfs: index check-integrity state hash by a dev_t

[Christoph Hellwig]

We won't have the struct block_device available in the bio soon, so switch
to the numerical dev_t instead of the block_device pointer for looking up
the check-integrity state.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/btrfs/check-integrity.c | 31 +++++++++++++------------------
 1 file changed, 13 insertions(+), 18 deletions(-)

diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 11d37c94ce05..9d3854839038 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -296,8 +296,7 @@ static void btrfsic_dev_state_hashtable_add(
 		struct btrfsic_dev_state *ds,
 		struct btrfsic_dev_state_hashtable *h);
 static void btrfsic_dev_state_hashtable_remove(struct btrfsic_dev_state *ds);
-static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(
-		struct block_device *bdev,
+static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(dev_t dev,
 		struct btrfsic_dev_state_hashtable *h);
 static struct btrfsic_stack_frame *btrfsic_stack_frame_alloc(void);
 static void btrfsic_stack_frame_free(struct btrfsic_stack_frame *sf);
@@ -385,8 +384,7 @@ static int btrfsic_process_superblock_dev_mirror(
 		int superblock_mirror_num,
 		struct btrfsic_dev_state **selected_dev_state,
 		struct btrfs_super_block *selected_super);
-static struct btrfsic_dev_state *btrfsic_dev_state_lookup(
-		struct block_device *bdev);
+static struct btrfsic_dev_state *btrfsic_dev_state_lookup(dev_t dev);
 static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 					   u64 bytenr,
 					   struct btrfsic_dev_state *dev_state,
@@ -626,17 +624,15 @@ static void btrfsic_dev_state_hashtable_remove(struct btrfsic_dev_state *ds)
 	list_del(&ds->collision_resolving_node);
 }
 
-static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(
-		struct block_device *bdev,
+static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(dev_t dev,
 		struct btrfsic_dev_state_hashtable *h)
 {
 	const unsigned int hashval =
-	    (((unsigned int)((uintptr_t)bdev)) &
-	     (BTRFSIC_DEV2STATE_HASHTABLE_SIZE - 1));
+		dev & (BTRFSIC_DEV2STATE_HASHTABLE_SIZE - 1);
 	struct btrfsic_dev_state *ds;
 
 	list_for_each_entry(ds, h->table + hashval, collision_resolving_node) {
-		if (ds->bdev == bdev)
+		if (ds->bdev->bd_dev == dev)
 			return ds;
 	}
 
@@ -668,7 +664,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
 		if (!device->bdev || !device->name)
 			continue;
 
-		dev_state = btrfsic_dev_state_lookup(device->bdev);
+		dev_state = btrfsic_dev_state_lookup(device->bdev->bd_dev);
 		BUG_ON(NULL == dev_state);
 		for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
 			ret = btrfsic_process_superblock_dev_mirror(
@@ -1556,7 +1552,7 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len,
 	}
 
 	device = multi->stripes[0].dev;
-	block_ctx_out->dev = btrfsic_dev_state_lookup(device->bdev);
+	block_ctx_out->dev = btrfsic_dev_state_lookup(device->bdev->bd_dev);
 	block_ctx_out->dev_bytenr = multi->stripes[0].physical;
 	block_ctx_out->start = bytenr;
 	block_ctx_out->len = len;
@@ -2654,7 +2650,7 @@ static struct btrfsic_block *btrfsic_block_lookup_or_add(
 			pr_info("btrfsic: error, kmalloc failed!\n");
 			return NULL;
 		}
-		dev_state = btrfsic_dev_state_lookup(block_ctx->dev->bdev);
+		dev_state = btrfsic_dev_state_lookup(block_ctx->dev->bdev->bd_dev);
 		if (NULL == dev_state) {
 			pr_info("btrfsic: error, lookup dev_state failed!\n");
 			btrfsic_block_free(block);
@@ -2734,10 +2730,9 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 	}
 }
 
-static struct btrfsic_dev_state *btrfsic_dev_state_lookup(
-		struct block_device *bdev)
+static struct btrfsic_dev_state *btrfsic_dev_state_lookup(dev_t dev)
 {
-	return btrfsic_dev_state_hashtable_lookup(bdev,
+	return btrfsic_dev_state_hashtable_lookup(dev,
 						  &btrfsic_dev_state_hashtable);
 }
 
@@ -2751,7 +2746,7 @@ int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)
 	mutex_lock(&btrfsic_mutex);
 	/* since btrfsic_submit_bh() might also be called before
 	 * btrfsic_mount(), this might return NULL */
-	dev_state = btrfsic_dev_state_lookup(bh->b_bdev);
+	dev_state = btrfsic_dev_state_lookup(bh->b_bdev->bd_dev);
 
 	/* Only called to write the superblock (incl. FLUSH/FUA) */
 	if (NULL != dev_state &&
@@ -2808,7 +2803,7 @@ 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->bi_bdev);
+	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;
@@ -2998,7 +2993,7 @@ void btrfsic_unmount(struct btrfs_fs_devices *fs_devices)
 			continue;
 
 		ds = btrfsic_dev_state_hashtable_lookup(
-				device->bdev,
+				device->bdev->bd_dev,
 				&btrfsic_dev_state_hashtable);
 		if (NULL != ds) {
 			state = ds->state;
-- 
2.11.0

Re: [PATCH 1/6] btrfs: index check-integrity state hash by a dev_t

[Liu Bo]

On Wed, Aug 23, 2017 at 07:10:27PM +0200, Christoph Hellwig wrote:
> We won't have the struct block_device available in the bio soon, so switch
> to the numerical dev_t instead of the block_device pointer for looking up
> the check-integrity state.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>

Thanks,

-liubo

> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  fs/btrfs/check-integrity.c | 31 +++++++++++++------------------
>  1 file changed, 13 insertions(+), 18 deletions(-)
> 
> diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
> index 11d37c94ce05..9d3854839038 100644
> --- a/fs/btrfs/check-integrity.c
> +++ b/fs/btrfs/check-integrity.c
> @@ -296,8 +296,7 @@ static void btrfsic_dev_state_hashtable_add(
>  		struct btrfsic_dev_state *ds,
>  		struct btrfsic_dev_state_hashtable *h);
>  static void btrfsic_dev_state_hashtable_remove(struct btrfsic_dev_state *ds);
> -static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(
> -		struct block_device *bdev,
> +static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(dev_t dev,
>  		struct btrfsic_dev_state_hashtable *h);
>  static struct btrfsic_stack_frame *btrfsic_stack_frame_alloc(void);
>  static void btrfsic_stack_frame_free(struct btrfsic_stack_frame *sf);
> @@ -385,8 +384,7 @@ static int btrfsic_process_superblock_dev_mirror(
>  		int superblock_mirror_num,
>  		struct btrfsic_dev_state **selected_dev_state,
>  		struct btrfs_super_block *selected_super);
> -static struct btrfsic_dev_state *btrfsic_dev_state_lookup(
> -		struct block_device *bdev);
> +static struct btrfsic_dev_state *btrfsic_dev_state_lookup(dev_t dev);
>  static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
>  					   u64 bytenr,
>  					   struct btrfsic_dev_state *dev_state,
> @@ -626,17 +624,15 @@ static void btrfsic_dev_state_hashtable_remove(struct btrfsic_dev_state *ds)
>  	list_del(&ds->collision_resolving_node);
>  }
>  
> -static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(
> -		struct block_device *bdev,
> +static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(dev_t dev,
>  		struct btrfsic_dev_state_hashtable *h)
>  {
>  	const unsigned int hashval =
> -	    (((unsigned int)((uintptr_t)bdev)) &
> -	     (BTRFSIC_DEV2STATE_HASHTABLE_SIZE - 1));
> +		dev & (BTRFSIC_DEV2STATE_HASHTABLE_SIZE - 1);
>  	struct btrfsic_dev_state *ds;
>  
>  	list_for_each_entry(ds, h->table + hashval, collision_resolving_node) {
> -		if (ds->bdev == bdev)
> +		if (ds->bdev->bd_dev == dev)
>  			return ds;
>  	}
>  
> @@ -668,7 +664,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
>  		if (!device->bdev || !device->name)
>  			continue;
>  
> -		dev_state = btrfsic_dev_state_lookup(device->bdev);
> +		dev_state = btrfsic_dev_state_lookup(device->bdev->bd_dev);
>  		BUG_ON(NULL == dev_state);
>  		for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
>  			ret = btrfsic_process_superblock_dev_mirror(
> @@ -1556,7 +1552,7 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len,
>  	}
>  
>  	device = multi->stripes[0].dev;
> -	block_ctx_out->dev = btrfsic_dev_state_lookup(device->bdev);
> +	block_ctx_out->dev = btrfsic_dev_state_lookup(device->bdev->bd_dev);
>  	block_ctx_out->dev_bytenr = multi->stripes[0].physical;
>  	block_ctx_out->start = bytenr;
>  	block_ctx_out->len = len;
> @@ -2654,7 +2650,7 @@ static struct btrfsic_block *btrfsic_block_lookup_or_add(
>  			pr_info("btrfsic: error, kmalloc failed!\n");
>  			return NULL;
>  		}
> -		dev_state = btrfsic_dev_state_lookup(block_ctx->dev->bdev);
> +		dev_state = btrfsic_dev_state_lookup(block_ctx->dev->bdev->bd_dev);
>  		if (NULL == dev_state) {
>  			pr_info("btrfsic: error, lookup dev_state failed!\n");
>  			btrfsic_block_free(block);
> @@ -2734,10 +2730,9 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
>  	}
>  }
>  
> -static struct btrfsic_dev_state *btrfsic_dev_state_lookup(
> -		struct block_device *bdev)
> +static struct btrfsic_dev_state *btrfsic_dev_state_lookup(dev_t dev)
>  {
> -	return btrfsic_dev_state_hashtable_lookup(bdev,
> +	return btrfsic_dev_state_hashtable_lookup(dev,
>  						  &btrfsic_dev_state_hashtable);
>  }
>  
> @@ -2751,7 +2746,7 @@ int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)
>  	mutex_lock(&btrfsic_mutex);
>  	/* since btrfsic_submit_bh() might also be called before
>  	 * btrfsic_mount(), this might return NULL */
> -	dev_state = btrfsic_dev_state_lookup(bh->b_bdev);
> +	dev_state = btrfsic_dev_state_lookup(bh->b_bdev->bd_dev);
>  
>  	/* Only called to write the superblock (incl. FLUSH/FUA) */
>  	if (NULL != dev_state &&
> @@ -2808,7 +2803,7 @@ 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->bi_bdev);
> +	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;
> @@ -2998,7 +2993,7 @@ void btrfsic_unmount(struct btrfs_fs_devices *fs_devices)
>  			continue;
>  
>  		ds = btrfsic_dev_state_hashtable_lookup(
> -				device->bdev,
> +				device->bdev->bd_dev,
>  				&btrfsic_dev_state_hashtable);
>  		if (NULL != ds) {
>  			state = ds->state;
> -- 
> 2.11.0
> 
> --
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> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

[PATCH 2/6] raid5: remove a call to get_start_sect

[Christoph Hellwig]

The block layer always remaps partitions before calling into the
->make_request methods of drivers.  Thus the call to get_start_sect in
in_chunk_boundary will always return 0 and can be removed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/md/raid5.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 0fc2748aaf95..d687aeb1b538 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5092,10 +5092,12 @@ static int raid5_congested(struct mddev *mddev, int bits)
 static int in_chunk_boundary(struct mddev *mddev, struct bio *bio)
 {
 	struct r5conf *conf = mddev->private;
-	sector_t sector = bio->bi_iter.bi_sector + get_start_sect(bio->bi_bdev);
+	sector_t sector = bio->bi_iter.bi_sector;
 	unsigned int chunk_sectors;
 	unsigned int bio_sectors = bio_sectors(bio);
 
+	WARN_ON_ONCE(bio->bi_partno);
+
 	chunk_sectors = min(conf->chunk_sectors, conf->prev_chunk_sectors);
 	return  chunk_sectors >=
 		((sector & (chunk_sectors - 1)) + bio_sectors);
-- 
2.11.0

Re: [PATCH 2/6] raid5: remove a call to get_start_sect

[Shaohua Li]

On Wed, Aug 23, 2017 at 07:10:28PM +0200, Christoph Hellwig wrote:
> The block layer always remaps partitions before calling into the
> ->make_request methods of drivers.  Thus the call to get_start_sect in
> in_chunk_boundary will always return 0 and can be removed.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/md/raid5.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
> index 0fc2748aaf95..d687aeb1b538 100644
> --- a/drivers/md/raid5.c
> +++ b/drivers/md/raid5.c
> @@ -5092,10 +5092,12 @@ static int raid5_congested(struct mddev *mddev, int bits)
>  static int in_chunk_boundary(struct mddev *mddev, struct bio *bio)
>  {
>  	struct r5conf *conf = mddev->private;
> -	sector_t sector = bio->bi_iter.bi_sector + get_start_sect(bio->bi_bdev);
> +	sector_t sector = bio->bi_iter.bi_sector;
>  	unsigned int chunk_sectors;
>  	unsigned int bio_sectors = bio_sectors(bio);
>  
> +	WARN_ON_ONCE(bio->bi_partno);
> +
>  	chunk_sectors = min(conf->chunk_sectors, conf->prev_chunk_sectors);
>  	return  chunk_sectors >=
>  		((sector & (chunk_sectors - 1)) + bio_sectors);

Reviewed-by: Shaohua Li <shli@fb.com>

Re: [PATCH 2/6] raid5: remove a call to get_start_sect

[Christoph Hellwig]

On Wed, Aug 23, 2017 at 11:23:38AM -0700, Shaohua Li wrote:
> On Wed, Aug 23, 2017 at 07:10:28PM +0200, Christoph Hellwig wrote:
> > The block layer always remaps partitions before calling into the
> > ->make_request methods of drivers.  Thus the call to get_start_sect in
> > in_chunk_boundary will always return 0 and can be removed.
> > 
> > Signed-off-by: Christoph Hellwig <hch@lst.de>
> > ---
> >  drivers/md/raid5.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
> > index 0fc2748aaf95..d687aeb1b538 100644
> > --- a/drivers/md/raid5.c
> > +++ b/drivers/md/raid5.c
> > @@ -5092,10 +5092,12 @@ static int raid5_congested(struct mddev *mddev, int bits)
> >  static int in_chunk_boundary(struct mddev *mddev, struct bio *bio)
> >  {
> >  	struct r5conf *conf = mddev->private;
> > -	sector_t sector = bio->bi_iter.bi_sector + get_start_sect(bio->bi_bdev);
> > +	sector_t sector = bio->bi_iter.bi_sector;
> >  	unsigned int chunk_sectors;
> >  	unsigned int bio_sectors = bio_sectors(bio);
> >  
> > +	WARN_ON_ONCE(bio->bi_partno);
> > +

Meh, of course bi_partno is only added a few patches later, so this
breaks bisectability.  But given that the patch is already in there's
probably nothing I can do here.

[PATCH 3/6] block: reject attempts to allocate more than DISK_MAX_PARTS partitions

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/genhd.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/block/genhd.c b/block/genhd.c
index 2367087cdb7c..3380a1e73ea0 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1357,6 +1357,13 @@ struct gendisk *alloc_disk_node(int minors, int node_id)
 	struct gendisk *disk;
 	struct disk_part_tbl *ptbl;
 
+	if (minors > DISK_MAX_PARTS) {
+		printk(KERN_ERR
+			"block: can't allocated more than %d partitions\n",
+			DISK_MAX_PARTS);
+		minors = DISK_MAX_PARTS;
+	}
+
 	disk = kzalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id);
 	if (disk) {
 		if (!init_part_stats(&disk->part0)) {
-- 
2.11.0

[PATCH 4/6] block: add a __disk_get_part helper

[Christoph Hellwig]

This helper allows looking up a partion under RCU protection without
grabbing a reference to it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/blk.h   |  2 ++
 block/genhd.c | 26 +++++++++++++-------------
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/block/blk.h b/block/blk.h
index 3a3d715bd725..fde8b351c166 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -204,6 +204,8 @@ static inline void elv_deactivate_rq(struct request_queue *q, struct request *rq
 		e->type->ops.sq.elevator_deactivate_req_fn(q, rq);
 }
 
+struct hd_struct *__disk_get_part(struct gendisk *disk, int partno);
+
 #ifdef CONFIG_FAIL_IO_TIMEOUT
 int blk_should_fake_timeout(struct request_queue *);
 ssize_t part_timeout_show(struct device *, struct device_attribute *, char *);
diff --git a/block/genhd.c b/block/genhd.c
index 3380a1e73ea0..713b7d4fe7a1 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -82,6 +82,15 @@ void part_in_flight(struct request_queue *q, struct hd_struct *part,
 	}
 }
 
+struct hd_struct *__disk_get_part(struct gendisk *disk, int partno)
+{
+	struct disk_part_tbl *ptbl = rcu_dereference(disk->part_tbl);
+
+	if (unlikely(partno < 0 || partno >= ptbl->len))
+		return NULL;
+	return rcu_dereference(ptbl->part[partno]);
+}
+
 /**
  * disk_get_part - get partition
  * @disk: disk to look partition from
@@ -98,21 +107,12 @@ void part_in_flight(struct request_queue *q, struct hd_struct *part,
  */
 struct hd_struct *disk_get_part(struct gendisk *disk, int partno)
 {
-	struct hd_struct *part = NULL;
-	struct disk_part_tbl *ptbl;
-
-	if (unlikely(partno < 0))
-		return NULL;
+	struct hd_struct *part;
 
 	rcu_read_lock();
-
-	ptbl = rcu_dereference(disk->part_tbl);
-	if (likely(partno < ptbl->len)) {
-		part = rcu_dereference(ptbl->part[partno]);
-		if (part)
-			get_device(part_to_dev(part));
-	}
-
+	part = __disk_get_part(disk, partno);
+	if (part)
+		get_device(part_to_dev(part));
 	rcu_read_unlock();
 
 	return part;
-- 
2.11.0

[PATCH 5/6] block: cache the partition index in struct block_device

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/block_dev.c     | 1 +
 include/linux/fs.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 9941dc8342df..d29d1c70f833 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1451,6 +1451,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
 		bdev->bd_disk = disk;
 		bdev->bd_queue = disk->queue;
 		bdev->bd_contains = bdev;
+		bdev->bd_partno = partno;
 
 		if (!partno) {
 			ret = -ENXIO;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6e1fd5d21248..706dd3a972d2 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -427,6 +427,7 @@ struct block_device {
 #endif
 	struct block_device *	bd_contains;
 	unsigned		bd_block_size;
+	u8			bd_partno;
 	struct hd_struct *	bd_part;
 	/* number of times partitions within this device have been opened. */
 	unsigned		bd_part_count;
-- 
2.11.0

[PATCH 6/6] block: replace bi_bdev with a gendisk pointer and partitions index

[Christoph Hellwig]

This way we don't need a block_device structure to submit I/O.  The
block_device has different life time rules from the gendisk and
request_queue and is usually only available when the block device node
is open.  Other callers need to explicitly create one (e.g. the lightnvm
passthrough code, or the new nvme multipathing code).

For the actual I/O path all that we need is the gendisk, which exists
once per block device.  But given that the block layer also does
partition remapping we additionally need a partition index, which is
used for said remapping in generic_make_request.

Note that all the block drivers generally want request_queue or
sometimes the gendisk, so this removes a layer of indirection all
over the stack.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/powerpc/sysdev/axonram.c       |   2 +-
 block/bio-integrity.c               |  18 +++----
 block/bio.c                         |  10 ++--
 block/blk-core.c                    | 100 ++++++++++++++++++------------------
 block/blk-flush.c                   |   2 +-
 block/blk-lib.c                     |   8 +--
 block/blk-merge.c                   |   2 +-
 block/blk-zoned.c                   |   4 +-
 drivers/block/brd.c                 |   5 +-
 drivers/block/drbd/drbd_actlog.c    |   2 +-
 drivers/block/drbd/drbd_bitmap.c    |   2 +-
 drivers/block/drbd/drbd_int.h       |   4 +-
 drivers/block/drbd/drbd_receiver.c  |   4 +-
 drivers/block/drbd/drbd_req.c       |   2 +-
 drivers/block/drbd/drbd_worker.c    |   2 +-
 drivers/block/floppy.c              |   2 +-
 drivers/block/pktcdvd.c             |  11 ++--
 drivers/block/xen-blkback/blkback.c |   4 +-
 drivers/md/bcache/debug.c           |   2 +-
 drivers/md/bcache/io.c              |   2 +-
 drivers/md/bcache/journal.c         |   6 +--
 drivers/md/bcache/request.c         |  16 +++---
 drivers/md/bcache/super.c           |   6 +--
 drivers/md/bcache/writeback.c       |   5 +-
 drivers/md/dm-bio-record.h          |   9 ++--
 drivers/md/dm-bufio.c               |   2 +-
 drivers/md/dm-cache-target.c        |   4 +-
 drivers/md/dm-crypt.c               |   4 +-
 drivers/md/dm-delay.c               |   4 +-
 drivers/md/dm-era-target.c          |   2 +-
 drivers/md/dm-flakey.c              |   2 +-
 drivers/md/dm-integrity.c           |  11 ++--
 drivers/md/dm-io.c                  |   2 +-
 drivers/md/dm-linear.c              |   2 +-
 drivers/md/dm-log-writes.c          |   8 +--
 drivers/md/dm-mpath.c               |   2 +-
 drivers/md/dm-raid1.c               |  12 ++---
 drivers/md/dm-snap.c                |  16 +++---
 drivers/md/dm-stripe.c              |  10 ++--
 drivers/md/dm-switch.c              |   2 +-
 drivers/md/dm-thin.c                |   6 +--
 drivers/md/dm-verity-target.c       |   2 +-
 drivers/md/dm-zoned-metadata.c      |   6 +--
 drivers/md/dm-zoned-target.c        |   4 +-
 drivers/md/dm.c                     |  10 ++--
 drivers/md/faulty.c                 |   4 +-
 drivers/md/linear.c                 |   6 +--
 drivers/md/md.c                     |  10 ++--
 drivers/md/md.h                     |   9 +++-
 drivers/md/multipath.c              |   8 +--
 drivers/md/raid0.c                  |   7 ++-
 drivers/md/raid1.c                  |  34 ++++++------
 drivers/md/raid10.c                 |  50 +++++++++---------
 drivers/md/raid5-cache.c            |   6 +--
 drivers/md/raid5-ppl.c              |   6 +--
 drivers/md/raid5.c                  |  12 ++---
 drivers/nvdimm/nd.h                 |   4 +-
 drivers/nvme/host/core.c            |  11 +---
 drivers/nvme/host/lightnvm.c        |  15 +-----
 drivers/nvme/target/io-cmd.c        |   6 +--
 drivers/s390/block/dcssblk.c        |   4 +-
 drivers/s390/block/xpram.c          |   2 +-
 drivers/target/target_core_iblock.c |   4 +-
 fs/block_dev.c                      |   4 +-
 fs/btrfs/check-integrity.c          |  12 ++---
 fs/btrfs/disk-io.c                  |   2 +-
 fs/btrfs/extent_io.c                |   6 +--
 fs/btrfs/raid56.c                   |   8 +--
 fs/btrfs/scrub.c                    |  12 ++---
 fs/btrfs/volumes.c                  |   2 +-
 fs/buffer.c                         |   4 +-
 fs/crypto/bio.c                     |   2 +-
 fs/direct-io.c                      |   8 +--
 fs/exofs/ore.c                      |   2 +-
 fs/ext4/page-io.c                   |   4 +-
 fs/ext4/readpage.c                  |   2 +-
 fs/f2fs/data.c                      |   5 +-
 fs/f2fs/segment.c                   |   2 +-
 fs/gfs2/lops.c                      |   2 +-
 fs/gfs2/meta_io.c                   |   2 +-
 fs/gfs2/ops_fstype.c                |   2 +-
 fs/hfsplus/wrapper.c                |   2 +-
 fs/iomap.c                          |   4 +-
 fs/jfs/jfs_logmgr.c                 |   4 +-
 fs/jfs/jfs_metapage.c               |   4 +-
 fs/mpage.c                          |   2 +-
 fs/nfs/blocklayout/blocklayout.c    |   2 +-
 fs/nilfs2/segbuf.c                  |   2 +-
 fs/ocfs2/cluster/heartbeat.c        |   2 +-
 fs/xfs/xfs_aops.c                   |   2 +-
 fs/xfs/xfs_buf.c                    |   2 +-
 include/linux/bio.h                 |  18 +++++++
 include/linux/blk_types.h           |   3 +-
 include/trace/events/bcache.h       |   6 +--
 include/trace/events/block.h        |  16 +++---
 include/trace/events/f2fs.h         |   2 +-
 kernel/power/swap.c                 |   5 +-
 kernel/trace/blktrace.c             |   2 +-
 mm/page_io.c                        |  17 +++---
 99 files changed, 358 insertions(+), 357 deletions(-)

diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c
index 2799706106c6..1e15deacccaf 100644
--- a/arch/powerpc/sysdev/axonram.c
+++ b/arch/powerpc/sysdev/axonram.c
@@ -110,7 +110,7 @@ axon_ram_irq_handler(int irq, void *dev)
 static blk_qc_t
 axon_ram_make_request(struct request_queue *queue, struct bio *bio)
 {
-	struct axon_ram_bank *bank = bio->bi_bdev->bd_disk->private_data;
+	struct axon_ram_bank *bank = bio->bi_disk->private_data;
 	unsigned long phys_mem, phys_end;
 	void *user_mem;
 	struct bio_vec vec;
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 5fa9a740fd99..fc71e6172869 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -146,7 +146,7 @@ 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(bdev_get_queue(bio->bi_bdev),
+	    bvec_gap_to_prev(bio->bi_disk->queue,
 			     &bip->bip_vec[bip->bip_vcnt - 1], offset))
 		return 0;
 
@@ -190,7 +190,7 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
 static blk_status_t bio_integrity_process(struct bio *bio,
 		struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn)
 {
-	struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev);
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
 	struct blk_integrity_iter iter;
 	struct bvec_iter bviter;
 	struct bio_vec bv;
@@ -199,7 +199,7 @@ 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_bdev->bd_disk->disk_name;
+	iter.disk_name = bio->bi_disk->disk_name;
 	iter.interval = 1 << bi->interval_exp;
 	iter.seed = proc_iter->bi_sector;
 	iter.prot_buf = prot_buf;
@@ -236,8 +236,8 @@ 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;
-	struct request_queue *q;
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
+	struct request_queue *q = bio->bi_disk->queue;
 	void *buf;
 	unsigned long start, end;
 	unsigned int len, nr_pages;
@@ -245,11 +245,9 @@ bool bio_integrity_prep(struct bio *bio)
 	unsigned int intervals;
 	blk_status_t status;
 
-	bi = bdev_get_integrity(bio->bi_bdev);
 	if (!bi)
 		return true;
 
-	q = bdev_get_queue(bio->bi_bdev);
 	if (bio_op(bio) != REQ_OP_READ && bio_op(bio) != REQ_OP_WRITE)
 		return true;
 
@@ -354,7 +352,7 @@ 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 = bdev_get_integrity(bio->bi_bdev);
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
 	struct bvec_iter iter = bio->bi_iter;
 
 	/*
@@ -411,7 +409,7 @@ 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 = bdev_get_integrity(bio->bi_bdev);
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
 	unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9);
 
 	bip->bip_iter.bi_sector += bytes_done >> 9;
@@ -428,7 +426,7 @@ EXPORT_SYMBOL(bio_integrity_advance);
 void bio_integrity_trim(struct bio *bio)
 {
 	struct bio_integrity_payload *bip = bio_integrity(bio);
-	struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev);
+	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
 
 	bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio));
 }
diff --git a/block/bio.c b/block/bio.c
index ecd1a9c7a301..6745759028da 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -593,10 +593,10 @@ 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_bdev with a new target,
+	 * most users will be overriding ->bi_disk with a new target,
 	 * so we don't set nor calculate new physical/hw segment counts here
 	 */
-	bio->bi_bdev = bio_src->bi_bdev;
+	bio->bi_disk = bio_src->bi_disk;
 	bio_set_flag(bio, BIO_CLONED);
 	bio->bi_opf = bio_src->bi_opf;
 	bio->bi_write_hint = bio_src->bi_write_hint;
@@ -681,7 +681,7 @@ struct bio *bio_clone_bioset(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_bdev		= bio_src->bi_bdev;
+	bio->bi_disk		= bio_src->bi_disk;
 	bio->bi_opf		= bio_src->bi_opf;
 	bio->bi_write_hint	= bio_src->bi_write_hint;
 	bio->bi_iter.bi_sector	= bio_src->bi_iter.bi_sector;
@@ -1830,8 +1830,8 @@ void bio_endio(struct bio *bio)
 		goto again;
 	}
 
-	if (bio->bi_bdev && bio_flagged(bio, BIO_TRACE_COMPLETION)) {
-		trace_block_bio_complete(bdev_get_queue(bio->bi_bdev), bio,
+	if (bio->bi_disk && bio_flagged(bio, BIO_TRACE_COMPLETION)) {
+		trace_block_bio_complete(bio->bi_disk->queue, bio,
 					 blk_status_to_errno(bio->bi_status));
 		bio_clear_flag(bio, BIO_TRACE_COMPLETION);
 	}
diff --git a/block/blk-core.c b/block/blk-core.c
index d579501f24ba..fc1af9097dff 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1910,40 +1910,15 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio)
 	return BLK_QC_T_NONE;
 }
 
-/*
- * If bio->bi_dev is a partition, remap the location
- */
-static inline void blk_partition_remap(struct bio *bio)
-{
-	struct block_device *bdev = bio->bi_bdev;
-
-	/*
-	 * Zone reset does not include bi_size so bio_sectors() is always 0.
-	 * Include a test for the reset op code and perform the remap if needed.
-	 */
-	if (bdev != bdev->bd_contains &&
-	    (bio_sectors(bio) || bio_op(bio) == REQ_OP_ZONE_RESET)) {
-		struct hd_struct *p = bdev->bd_part;
-
-		bio->bi_iter.bi_sector += p->start_sect;
-		bio->bi_bdev = bdev->bd_contains;
-
-		trace_block_bio_remap(bdev_get_queue(bio->bi_bdev), bio,
-				      bdev->bd_dev,
-				      bio->bi_iter.bi_sector - p->start_sect);
-	}
-}
-
 static void handle_bad_sector(struct bio *bio)
 {
 	char b[BDEVNAME_SIZE];
 
 	printk(KERN_INFO "attempt to access beyond end of device\n");
 	printk(KERN_INFO "%s: rw=%d, want=%Lu, limit=%Lu\n",
-			bdevname(bio->bi_bdev, b),
-			bio->bi_opf,
+			bio_devname(bio, b), bio->bi_opf,
 			(unsigned long long)bio_end_sector(bio),
-			(long long)(i_size_read(bio->bi_bdev->bd_inode) >> 9));
+			(long long)get_capacity(bio->bi_disk));
 }
 
 #ifdef CONFIG_FAIL_MAKE_REQUEST
@@ -1982,6 +1957,38 @@ static inline bool should_fail_request(struct hd_struct *part,
 #endif /* CONFIG_FAIL_MAKE_REQUEST */
 
 /*
+ * Remap block n of partition p to block n+start(p) of the disk.
+ */
+static inline int blk_partition_remap(struct bio *bio)
+{
+	struct hd_struct *p;
+	int ret = 0;
+
+	/*
+	 * Zone reset does not include bi_size so bio_sectors() is always 0.
+	 * Include a test for the reset op code and perform the remap if needed.
+	 */
+	if (!bio->bi_partno ||
+	    (!bio_sectors(bio) && bio_op(bio) != REQ_OP_ZONE_RESET))
+		return 0;
+
+	rcu_read_lock();
+	p = __disk_get_part(bio->bi_disk, bio->bi_partno);
+	if (likely(p && !should_fail_request(p, bio->bi_iter.bi_size))) {
+		bio->bi_iter.bi_sector += p->start_sect;
+		bio->bi_partno = 0;
+		trace_block_bio_remap(bio->bi_disk->queue, bio, part_devt(p),
+				bio->bi_iter.bi_sector - p->start_sect);
+	} else {
+		printk("%s: fail for partition %d\n", __func__, bio->bi_partno);
+		ret = -EIO;
+	}
+	rcu_read_unlock();
+
+	return ret;
+}
+
+/*
  * Check whether this bio extends beyond the end of the device.
  */
 static inline int bio_check_eod(struct bio *bio, unsigned int nr_sectors)
@@ -1992,7 +1999,7 @@ static inline int bio_check_eod(struct bio *bio, unsigned int nr_sectors)
 		return 0;
 
 	/* Test device or partition size, when known. */
-	maxsector = i_size_read(bio->bi_bdev->bd_inode) >> 9;
+	maxsector = get_capacity(bio->bi_disk);
 	if (maxsector) {
 		sector_t sector = bio->bi_iter.bi_sector;
 
@@ -2017,20 +2024,18 @@ generic_make_request_checks(struct bio *bio)
 	int nr_sectors = bio_sectors(bio);
 	blk_status_t status = BLK_STS_IOERR;
 	char b[BDEVNAME_SIZE];
-	struct hd_struct *part;
 
 	might_sleep();
 
 	if (bio_check_eod(bio, nr_sectors))
 		goto end_io;
 
-	q = bdev_get_queue(bio->bi_bdev);
+	q = bio->bi_disk->queue;
 	if (unlikely(!q)) {
 		printk(KERN_ERR
 		       "generic_make_request: Trying to access "
 			"nonexistent block-device %s (%Lu)\n",
-			bdevname(bio->bi_bdev, b),
-			(long long) bio->bi_iter.bi_sector);
+			bio_devname(bio, b), (long long)bio->bi_iter.bi_sector);
 		goto end_io;
 	}
 
@@ -2042,17 +2047,11 @@ generic_make_request_checks(struct bio *bio)
 	if ((bio->bi_opf & REQ_NOWAIT) && !queue_is_rq_based(q))
 		goto not_supported;
 
-	part = bio->bi_bdev->bd_part;
-	if (should_fail_request(part, bio->bi_iter.bi_size) ||
-	    should_fail_request(&part_to_disk(part)->part0,
-				bio->bi_iter.bi_size))
+	if (should_fail_request(&bio->bi_disk->part0, bio->bi_iter.bi_size))
 		goto end_io;
 
-	/*
-	 * If this device has partitions, remap block n
-	 * of partition p to block n+start(p) of the disk.
-	 */
-	blk_partition_remap(bio);
+	if (blk_partition_remap(bio))
+		goto end_io;
 
 	if (bio_check_eod(bio, nr_sectors))
 		goto end_io;
@@ -2081,16 +2080,16 @@ generic_make_request_checks(struct bio *bio)
 			goto not_supported;
 		break;
 	case REQ_OP_WRITE_SAME:
-		if (!bdev_write_same(bio->bi_bdev))
+		if (!q->limits.max_write_same_sectors)
 			goto not_supported;
 		break;
 	case REQ_OP_ZONE_REPORT:
 	case REQ_OP_ZONE_RESET:
-		if (!bdev_is_zoned(bio->bi_bdev))
+		if (!blk_queue_is_zoned(q))
 			goto not_supported;
 		break;
 	case REQ_OP_WRITE_ZEROES:
-		if (!bdev_write_zeroes_sectors(bio->bi_bdev))
+		if (!q->limits.max_write_zeroes_sectors)
 			goto not_supported;
 		break;
 	default:
@@ -2197,7 +2196,7 @@ blk_qc_t generic_make_request(struct bio *bio)
 	bio_list_init(&bio_list_on_stack[0]);
 	current->bio_list = bio_list_on_stack;
 	do {
-		struct request_queue *q = bdev_get_queue(bio->bi_bdev);
+		struct request_queue *q = bio->bi_disk->queue;
 
 		if (likely(blk_queue_enter(q, bio->bi_opf & REQ_NOWAIT) == 0)) {
 			struct bio_list lower, same;
@@ -2215,7 +2214,7 @@ blk_qc_t generic_make_request(struct bio *bio)
 			bio_list_init(&lower);
 			bio_list_init(&same);
 			while ((bio = bio_list_pop(&bio_list_on_stack[0])) != NULL)
-				if (q == bdev_get_queue(bio->bi_bdev))
+				if (q == bio->bi_disk->queue)
 					bio_list_add(&same, bio);
 				else
 					bio_list_add(&lower, bio);
@@ -2258,7 +2257,7 @@ blk_qc_t submit_bio(struct bio *bio)
 		unsigned int count;
 
 		if (unlikely(bio_op(bio) == REQ_OP_WRITE_SAME))
-			count = bdev_logical_block_size(bio->bi_bdev) >> 9;
+			count = queue_logical_block_size(bio->bi_disk->queue);
 		else
 			count = bio_sectors(bio);
 
@@ -2275,8 +2274,7 @@ blk_qc_t submit_bio(struct bio *bio)
 			current->comm, task_pid_nr(current),
 				op_is_write(bio_op(bio)) ? "WRITE" : "READ",
 				(unsigned long long)bio->bi_iter.bi_sector,
-				bdevname(bio->bi_bdev, b),
-				count);
+				bio_devname(bio, b), count);
 		}
 	}
 
@@ -3049,8 +3047,8 @@ void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
 	rq->__data_len = bio->bi_iter.bi_size;
 	rq->bio = rq->biotail = bio;
 
-	if (bio->bi_bdev)
-		rq->rq_disk = bio->bi_bdev->bd_disk;
+	if (bio->bi_disk)
+		rq->rq_disk = bio->bi_disk;
 }
 
 #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
diff --git a/block/blk-flush.c b/block/blk-flush.c
index ed5fe322abba..83b7d5b41c79 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -525,7 +525,7 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
 		return -ENXIO;
 
 	bio = bio_alloc(gfp_mask, 0);
-	bio->bi_bdev = bdev;
+	bio_set_dev(bio, bdev);
 	bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
 
 	ret = submit_bio_wait(bio);
diff --git a/block/blk-lib.c b/block/blk-lib.c
index 3fe0aec90597..e01adb5145b3 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -77,7 +77,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
 
 		bio = next_bio(bio, 0, gfp_mask);
 		bio->bi_iter.bi_sector = sector;
-		bio->bi_bdev = bdev;
+		bio_set_dev(bio, bdev);
 		bio_set_op_attrs(bio, op, 0);
 
 		bio->bi_iter.bi_size = req_sects << 9;
@@ -168,7 +168,7 @@ static int __blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
 	while (nr_sects) {
 		bio = next_bio(bio, 1, gfp_mask);
 		bio->bi_iter.bi_sector = sector;
-		bio->bi_bdev = bdev;
+		bio_set_dev(bio, bdev);
 		bio->bi_vcnt = 1;
 		bio->bi_io_vec->bv_page = page;
 		bio->bi_io_vec->bv_offset = 0;
@@ -241,7 +241,7 @@ static int __blkdev_issue_write_zeroes(struct block_device *bdev,
 	while (nr_sects) {
 		bio = next_bio(bio, 0, gfp_mask);
 		bio->bi_iter.bi_sector = sector;
-		bio->bi_bdev = bdev;
+		bio_set_dev(bio, bdev);
 		bio->bi_opf = REQ_OP_WRITE_ZEROES;
 		if (flags & BLKDEV_ZERO_NOUNMAP)
 			bio->bi_opf |= REQ_NOUNMAP;
@@ -323,7 +323,7 @@ int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
 		bio = next_bio(bio, __blkdev_sectors_to_bio_pages(nr_sects),
 			       gfp_mask);
 		bio->bi_iter.bi_sector = sector;
-		bio->bi_bdev   = bdev;
+		bio_set_dev(bio, bdev);
 		bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 
 		while (nr_sects != 0) {
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 05f116bfb99d..aa524cad5bea 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -786,7 +786,7 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
 		return false;
 
 	/* must be same device and not a special request */
-	if (rq->rq_disk != bio->bi_bdev->bd_disk || req_no_special_merge(rq))
+	if (rq->rq_disk != bio->bi_disk || req_no_special_merge(rq))
 		return false;
 
 	/* only merge integrity protected bio into ditto rq */
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 3bd15d8095b1..ff57fb51b338 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -116,7 +116,7 @@ int blkdev_report_zones(struct block_device *bdev,
 	if (!bio)
 		return -ENOMEM;
 
-	bio->bi_bdev = bdev;
+	bio_set_dev(bio, bdev);
 	bio->bi_iter.bi_sector = blk_zone_start(q, sector);
 	bio_set_op_attrs(bio, REQ_OP_ZONE_REPORT, 0);
 
@@ -234,7 +234,7 @@ int blkdev_reset_zones(struct block_device *bdev,
 
 		bio = bio_alloc(gfp_mask, 0);
 		bio->bi_iter.bi_sector = sector;
-		bio->bi_bdev = bdev;
+		bio_set_dev(bio, bdev);
 		bio_set_op_attrs(bio, REQ_OP_ZONE_RESET, 0);
 
 		ret = submit_bio_wait(bio);
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 104b71c0490d..006e1cb7e6f0 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -294,14 +294,13 @@ static int brd_do_bvec(struct brd_device *brd, struct page *page,
 
 static blk_qc_t brd_make_request(struct request_queue *q, struct bio *bio)
 {
-	struct block_device *bdev = bio->bi_bdev;
-	struct brd_device *brd = bdev->bd_disk->private_data;
+	struct brd_device *brd = bio->bi_disk->private_data;
 	struct bio_vec bvec;
 	sector_t sector;
 	struct bvec_iter iter;
 
 	sector = bio->bi_iter.bi_sector;
-	if (bio_end_sector(bio) > get_capacity(bdev->bd_disk))
+	if (bio_end_sector(bio) > get_capacity(bio->bi_disk))
 		goto io_error;
 
 	bio_for_each_segment(bvec, bio, iter) {
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c
index e02c45cd3c5a..5f0eaee8c8a7 100644
--- a/drivers/block/drbd/drbd_actlog.c
+++ b/drivers/block/drbd/drbd_actlog.c
@@ -151,7 +151,7 @@ static int _drbd_md_sync_page_io(struct drbd_device *device,
 	op_flags |= REQ_SYNC;
 
 	bio = bio_alloc_drbd(GFP_NOIO);
-	bio->bi_bdev = bdev->md_bdev;
+	bio_set_dev(bio, bdev->md_bdev);
 	bio->bi_iter.bi_sector = sector;
 	err = -EIO;
 	if (bio_add_page(bio, device->md_io.page, size, 0) != size)
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index 809fd245c3dc..bd97908c766f 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -1019,7 +1019,7 @@ static void bm_page_io_async(struct drbd_bm_aio_ctx *ctx, int page_nr) __must_ho
 		bm_store_page_idx(page, page_nr);
 	} else
 		page = b->bm_pages[page_nr];
-	bio->bi_bdev = device->ldev->md_bdev;
+	bio_set_dev(bio, device->ldev->md_bdev);
 	bio->bi_iter.bi_sector = on_disk_sector;
 	/* bio_add_page of a single page to an empty bio will always succeed,
 	 * according to api.  Do we want to assert that? */
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index d17b6e6393c7..819f9d0bc875 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1628,8 +1628,8 @@ static inline void drbd_generic_make_request(struct drbd_device *device,
 					     int fault_type, struct bio *bio)
 {
 	__release(local);
-	if (!bio->bi_bdev) {
-		drbd_err(device, "drbd_generic_make_request: bio->bi_bdev == NULL\n");
+	if (!bio->bi_disk) {
+		drbd_err(device, "drbd_generic_make_request: bio->bi_disk == NULL\n");
 		bio->bi_status = BLK_STS_IOERR;
 		bio_endio(bio);
 		return;
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index c7e95e6380fb..ece6e5d7dc3f 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1265,7 +1265,7 @@ static void submit_one_flush(struct drbd_device *device, struct issue_flush_cont
 
 	octx->device = device;
 	octx->ctx = ctx;
-	bio->bi_bdev = device->ldev->backing_bdev;
+	bio_set_dev(bio, device->ldev->backing_bdev);
 	bio->bi_private = octx;
 	bio->bi_end_io = one_flush_endio;
 	bio->bi_opf = REQ_OP_FLUSH | REQ_PREFLUSH;
@@ -1548,7 +1548,7 @@ int drbd_submit_peer_request(struct drbd_device *device,
 	}
 	/* > peer_req->i.sector, unless this is the first bio */
 	bio->bi_iter.bi_sector = sector;
-	bio->bi_bdev = device->ldev->backing_bdev;
+	bio_set_dev(bio, device->ldev->backing_bdev);
 	bio_set_op_attrs(bio, op, op_flags);
 	bio->bi_private = peer_req;
 	bio->bi_end_io = drbd_peer_request_endio;
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 8d6b5d137b5e..447c975f5481 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -1179,7 +1179,7 @@ drbd_submit_req_private_bio(struct drbd_request *req)
 	else
 		type = DRBD_FAULT_DT_RD;
 
-	bio->bi_bdev = device->ldev->backing_bdev;
+	bio_set_dev(bio, device->ldev->backing_bdev);
 
 	/* State may have changed since we grabbed our reference on the
 	 * ->ldev member. Double check, and short-circuit to endio.
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 1d8726a8df34..c268d886c4f0 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -1513,7 +1513,7 @@ int w_restart_disk_io(struct drbd_work *w, int cancel)
 		drbd_al_begin_io(device, &req->i);
 
 	drbd_req_make_private_bio(req, req->master_bio);
-	req->private_bio->bi_bdev = device->ldev->backing_bdev;
+	bio_set_dev(req->private_bio, device->ldev->backing_bdev);
 	generic_make_request(req->private_bio);
 
 	return 0;
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 9c00f29e40c1..60c086a53609 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4134,7 +4134,7 @@ static int __floppy_read_block_0(struct block_device *bdev, int drive)
 	cbdata.drive = drive;
 
 	bio_init(&bio, &bio_vec, 1);
-	bio.bi_bdev = bdev;
+	bio_set_dev(&bio, bdev);
 	bio_add_page(&bio, page, size, 0);
 
 	bio.bi_iter.bi_sector = 0;
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 6b8b097abbb9..67974796c350 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -1028,7 +1028,7 @@ static void pkt_gather_data(struct pktcdvd_device *pd, struct packet_data *pkt)
 		bio = pkt->r_bios[f];
 		bio_reset(bio);
 		bio->bi_iter.bi_sector = pkt->sector + f * (CD_FRAMESIZE >> 9);
-		bio->bi_bdev = pd->bdev;
+		bio_set_dev(bio, pd->bdev);
 		bio->bi_end_io = pkt_end_io_read;
 		bio->bi_private = pkt;
 
@@ -1122,7 +1122,7 @@ static int pkt_start_recovery(struct packet_data *pkt)
 	pkt->sector = new_sector;
 
 	bio_reset(pkt->bio);
-	pkt->bio->bi_bdev = pd->bdev;
+	bio_set_set(pkt->bio, pd->bdev);
 	bio_set_op_attrs(pkt->bio, REQ_OP_WRITE, 0);
 	pkt->bio->bi_iter.bi_sector = new_sector;
 	pkt->bio->bi_iter.bi_size = pkt->frames * CD_FRAMESIZE;
@@ -1267,7 +1267,7 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
 
 	bio_reset(pkt->w_bio);
 	pkt->w_bio->bi_iter.bi_sector = pkt->sector;
-	pkt->w_bio->bi_bdev = pd->bdev;
+	bio_set_dev(pkt->w_bio, pd->bdev);
 	pkt->w_bio->bi_end_io = pkt_end_io_packet_write;
 	pkt->w_bio->bi_private = pkt;
 
@@ -2314,7 +2314,7 @@ static void pkt_make_request_read(struct pktcdvd_device *pd, struct bio *bio)
 
 	psd->pd = pd;
 	psd->bio = bio;
-	cloned_bio->bi_bdev = pd->bdev;
+	bio_set_dev(cloned_bio, pd->bdev);
 	cloned_bio->bi_private = psd;
 	cloned_bio->bi_end_io = pkt_end_io_read_cloned;
 	pd->stats.secs_r += bio_sectors(bio);
@@ -2415,8 +2415,7 @@ static blk_qc_t pkt_make_request(struct request_queue *q, struct bio *bio)
 
 	pd = q->queuedata;
 	if (!pd) {
-		pr_err("%s incorrect request queue\n",
-		       bdevname(bio->bi_bdev, b));
+		pr_err("%s incorrect request queue\n", bio_devname(bio, b));
 		goto end_io;
 	}
 
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index 5f3a813e7ae0..987d665e82de 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -1363,7 +1363,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
 				goto fail_put_bio;
 
 			biolist[nbio++] = bio;
-			bio->bi_bdev    = preq.bdev;
+			bio_set_dev(bio, preq.bdev);
 			bio->bi_private = pending_req;
 			bio->bi_end_io  = end_block_io_op;
 			bio->bi_iter.bi_sector  = preq.sector_number;
@@ -1382,7 +1382,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
 			goto fail_put_bio;
 
 		biolist[nbio++] = bio;
-		bio->bi_bdev    = preq.bdev;
+		bio_set_dev(bio, preq.bdev);
 		bio->bi_private = pending_req;
 		bio->bi_end_io  = end_block_io_op;
 		bio_set_op_attrs(bio, operation, operation_flags);
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 35a5a7210e51..61076eda2e6d 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -49,7 +49,7 @@ void bch_btree_verify(struct btree *b)
 	v->keys.ops = b->keys.ops;
 
 	bio = bch_bbio_alloc(b->c);
-	bio->bi_bdev		= PTR_CACHE(b->c, &b->key, 0)->bdev;
+	bio_set_dev(bio, PTR_CACHE(b->c, &b->key, 0)->bdev);
 	bio->bi_iter.bi_sector	= PTR_OFFSET(&b->key, 0);
 	bio->bi_iter.bi_size	= KEY_SIZE(&v->key) << 9;
 	bio->bi_opf		= REQ_OP_READ | REQ_META;
diff --git a/drivers/md/bcache/io.c b/drivers/md/bcache/io.c
index 6a9b85095e7b..7e871bdc0097 100644
--- a/drivers/md/bcache/io.c
+++ b/drivers/md/bcache/io.c
@@ -34,7 +34,7 @@ void __bch_submit_bbio(struct bio *bio, struct cache_set *c)
 	struct bbio *b = container_of(bio, struct bbio, bio);
 
 	bio->bi_iter.bi_sector	= PTR_OFFSET(&b->key, 0);
-	bio->bi_bdev		= PTR_CACHE(c, &b->key, 0)->bdev;
+	bio_set_dev(bio, PTR_CACHE(c, &b->key, 0)->bdev);
 
 	b->submit_time_us = local_clock_us();
 	closure_bio_submit(bio, bio->bi_private);
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index 0352d05e495c..7e1d1c3ba33a 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -53,7 +53,7 @@ reread:		left = ca->sb.bucket_size - offset;
 
 		bio_reset(bio);
 		bio->bi_iter.bi_sector	= bucket + offset;
-		bio->bi_bdev	= ca->bdev;
+		bio_set_dev(bio, ca->bdev);
 		bio->bi_iter.bi_size	= len << 9;
 
 		bio->bi_end_io	= journal_read_endio;
@@ -452,7 +452,7 @@ static void do_journal_discard(struct cache *ca)
 		bio_set_op_attrs(bio, REQ_OP_DISCARD, 0);
 		bio->bi_iter.bi_sector	= bucket_to_sector(ca->set,
 						ca->sb.d[ja->discard_idx]);
-		bio->bi_bdev		= ca->bdev;
+		bio_set_dev(bio, ca->bdev);
 		bio->bi_iter.bi_size	= bucket_bytes(ca);
 		bio->bi_end_io		= journal_discard_endio;
 
@@ -623,7 +623,7 @@ static void journal_write_unlocked(struct closure *cl)
 
 		bio_reset(bio);
 		bio->bi_iter.bi_sector	= PTR_OFFSET(k, i);
-		bio->bi_bdev	= ca->bdev;
+		bio_set_dev(bio, ca->bdev);
 		bio->bi_iter.bi_size = sectors << 9;
 
 		bio->bi_end_io	= journal_write_endio;
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 72eb97176403..0e1463d0c334 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -607,7 +607,7 @@ static void request_endio(struct bio *bio)
 static void bio_complete(struct search *s)
 {
 	if (s->orig_bio) {
-		struct request_queue *q = bdev_get_queue(s->orig_bio->bi_bdev);
+		struct request_queue *q = s->orig_bio->bi_disk->queue;
 		generic_end_io_acct(q, bio_data_dir(s->orig_bio),
 				    &s->d->disk->part0, s->start_time);
 
@@ -735,7 +735,7 @@ static void cached_dev_read_done(struct closure *cl)
 	if (s->iop.bio) {
 		bio_reset(s->iop.bio);
 		s->iop.bio->bi_iter.bi_sector = s->cache_miss->bi_iter.bi_sector;
-		s->iop.bio->bi_bdev = s->cache_miss->bi_bdev;
+		bio_copy_dev(s->iop.bio, s->cache_miss);
 		s->iop.bio->bi_iter.bi_size = s->insert_bio_sectors << 9;
 		bch_bio_map(s->iop.bio, NULL);
 
@@ -794,7 +794,7 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
 	    !(bio->bi_opf & REQ_META) &&
 	    s->iop.c->gc_stats.in_use < CUTOFF_CACHE_READA)
 		reada = min_t(sector_t, dc->readahead >> 9,
-			      bdev_sectors(bio->bi_bdev) - bio_end_sector(bio));
+			      get_capacity(bio->bi_disk) - bio_end_sector(bio));
 
 	s->insert_bio_sectors = min(sectors, bio_sectors(bio) + reada);
 
@@ -820,7 +820,7 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
 		goto out_submit;
 
 	cache_bio->bi_iter.bi_sector	= miss->bi_iter.bi_sector;
-	cache_bio->bi_bdev		= miss->bi_bdev;
+	bio_copy_dev(cache_bio, miss);
 	cache_bio->bi_iter.bi_size	= s->insert_bio_sectors << 9;
 
 	cache_bio->bi_end_io	= request_endio;
@@ -919,7 +919,7 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s)
 			struct bio *flush = bio_alloc_bioset(GFP_NOIO, 0,
 							     dc->disk.bio_split);
 
-			flush->bi_bdev	= bio->bi_bdev;
+			bio_copy_dev(flush, bio);
 			flush->bi_end_io = request_endio;
 			flush->bi_private = cl;
 			flush->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
@@ -956,13 +956,13 @@ static blk_qc_t cached_dev_make_request(struct request_queue *q,
 					struct bio *bio)
 {
 	struct search *s;
-	struct bcache_device *d = bio->bi_bdev->bd_disk->private_data;
+	struct bcache_device *d = bio->bi_disk->private_data;
 	struct cached_dev *dc = container_of(d, struct cached_dev, disk);
 	int rw = bio_data_dir(bio);
 
 	generic_start_io_acct(q, rw, bio_sectors(bio), &d->disk->part0);
 
-	bio->bi_bdev = dc->bdev;
+	bio_set_dev(bio, dc->bdev);
 	bio->bi_iter.bi_sector += dc->sb.data_offset;
 
 	if (cached_dev_get(dc)) {
@@ -1072,7 +1072,7 @@ static blk_qc_t flash_dev_make_request(struct request_queue *q,
 {
 	struct search *s;
 	struct closure *cl;
-	struct bcache_device *d = bio->bi_bdev->bd_disk->private_data;
+	struct bcache_device *d = bio->bi_disk->private_data;
 	int rw = bio_data_dir(bio);
 
 	generic_start_io_acct(q, rw, bio_sectors(bio), &d->disk->part0);
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 8352fad765f6..974d832e54a6 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -257,7 +257,7 @@ void bch_write_bdev_super(struct cached_dev *dc, struct closure *parent)
 	closure_init(cl, parent);
 
 	bio_reset(bio);
-	bio->bi_bdev	= dc->bdev;
+	bio_set_dev(bio, dc->bdev);
 	bio->bi_end_io	= write_bdev_super_endio;
 	bio->bi_private = dc;
 
@@ -303,7 +303,7 @@ void bcache_write_super(struct cache_set *c)
 		SET_CACHE_SYNC(&ca->sb, CACHE_SYNC(&c->sb));
 
 		bio_reset(bio);
-		bio->bi_bdev	= ca->bdev;
+		bio_set_dev(bio, ca->bdev);
 		bio->bi_end_io	= write_super_endio;
 		bio->bi_private = ca;
 
@@ -508,7 +508,7 @@ static void prio_io(struct cache *ca, uint64_t bucket, int op,
 	closure_init_stack(cl);
 
 	bio->bi_iter.bi_sector	= bucket * ca->sb.bucket_size;
-	bio->bi_bdev		= ca->bdev;
+	bio_set_dev(bio, ca->bdev);
 	bio->bi_iter.bi_size	= bucket_bytes(ca);
 
 	bio->bi_end_io	= prio_endio;
diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c
index 42c66e76f05e..c49022a8dc9d 100644
--- a/drivers/md/bcache/writeback.c
+++ b/drivers/md/bcache/writeback.c
@@ -181,7 +181,7 @@ static void write_dirty(struct closure *cl)
 	dirty_init(w);
 	bio_set_op_attrs(&io->bio, REQ_OP_WRITE, 0);
 	io->bio.bi_iter.bi_sector = KEY_START(&w->key);
-	io->bio.bi_bdev		= io->dc->bdev;
+	bio_set_dev(&io->bio, io->dc->bdev);
 	io->bio.bi_end_io	= dirty_endio;
 
 	closure_bio_submit(&io->bio, cl);
@@ -250,8 +250,7 @@ static void read_dirty(struct cached_dev *dc)
 		dirty_init(w);
 		bio_set_op_attrs(&io->bio, REQ_OP_READ, 0);
 		io->bio.bi_iter.bi_sector = PTR_OFFSET(&w->key, 0);
-		io->bio.bi_bdev		= PTR_CACHE(dc->disk.c,
-						    &w->key, 0)->bdev;
+		bio_set_dev(&io->bio, PTR_CACHE(dc->disk.c, &w->key, 0)->bdev);
 		io->bio.bi_end_io	= read_dirty_endio;
 
 		if (bio_alloc_pages(&io->bio, GFP_KERNEL))
diff --git a/drivers/md/dm-bio-record.h b/drivers/md/dm-bio-record.h
index dd3646111561..c82578af56a5 100644
--- a/drivers/md/dm-bio-record.h
+++ b/drivers/md/dm-bio-record.h
@@ -18,21 +18,24 @@
  */
 
 struct dm_bio_details {
-	struct block_device *bi_bdev;
+	struct gendisk *bi_disk;
+	u8 bi_partno;
 	unsigned long bi_flags;
 	struct bvec_iter bi_iter;
 };
 
 static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
 {
-	bd->bi_bdev = bio->bi_bdev;
+	bd->bi_disk = bio->bi_disk;
+	bd->bi_partno = bio->bi_partno;
 	bd->bi_flags = bio->bi_flags;
 	bd->bi_iter = bio->bi_iter;
 }
 
 static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
 {
-	bio->bi_bdev = bd->bi_bdev;
+	bio->bi_disk = bd->bi_disk;
+	bio->bi_partno = bd->bi_partno;
 	bio->bi_flags = bd->bi_flags;
 	bio->bi_iter = bd->bi_iter;
 }
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index 44f4a8ac95bd..9601225e0ae9 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -616,7 +616,7 @@ static void use_inline_bio(struct dm_buffer *b, int rw, sector_t sector,
 
 	bio_init(&b->bio, b->bio_vec, DM_BUFIO_INLINE_VECS);
 	b->bio.bi_iter.bi_sector = sector;
-	b->bio.bi_bdev = b->c->bdev;
+	bio_set_dev(&b->bio, b->c->bdev);
 	b->bio.bi_end_io = inline_endio;
 	/*
 	 * Use of .bi_private isn't a problem here because
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index c5ea03fc7ee1..dcac25c2be7a 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -833,7 +833,7 @@ static bool is_discarded_oblock(struct cache *cache, dm_oblock_t b)
  *--------------------------------------------------------------*/
 static void remap_to_origin(struct cache *cache, struct bio *bio)
 {
-	bio->bi_bdev = cache->origin_dev->bdev;
+	bio_set_dev(bio, cache->origin_dev->bdev);
 }
 
 static void remap_to_cache(struct cache *cache, struct bio *bio,
@@ -842,7 +842,7 @@ static void remap_to_cache(struct cache *cache, struct bio *bio,
 	sector_t bi_sector = bio->bi_iter.bi_sector;
 	sector_t block = from_cblock(cblock);
 
-	bio->bi_bdev = cache->cache_dev->bdev;
+	bio_set_dev(bio, cache->cache_dev->bdev);
 	if (!block_size_is_power_of_two(cache))
 		bio->bi_iter.bi_sector =
 			(block * cache->sectors_per_block) +
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 73c2e270cda6..ca99147208a9 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1544,7 +1544,7 @@ static void clone_init(struct dm_crypt_io *io, struct bio *clone)
 
 	clone->bi_private = io;
 	clone->bi_end_io  = crypt_endio;
-	clone->bi_bdev    = cc->dev->bdev;
+	bio_set_dev(clone, cc->dev->bdev);
 	clone->bi_opf	  = io->base_bio->bi_opf;
 }
 
@@ -2793,7 +2793,7 @@ static int crypt_map(struct dm_target *ti, struct bio *bio)
 	 */
 	if (unlikely(bio->bi_opf & REQ_PREFLUSH ||
 	    bio_op(bio) == REQ_OP_DISCARD)) {
-		bio->bi_bdev = cc->dev->bdev;
+		bio_set_dev(bio, cc->dev->bdev);
 		if (bio_sectors(bio))
 			bio->bi_iter.bi_sector = cc->start +
 				dm_target_offset(ti, bio->bi_iter.bi_sector);
diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index ae3158795d26..2209a9700acd 100644
--- a/drivers/md/dm-delay.c
+++ b/drivers/md/dm-delay.c
@@ -282,7 +282,7 @@ static int delay_map(struct dm_target *ti, struct bio *bio)
 	struct delay_c *dc = ti->private;
 
 	if ((bio_data_dir(bio) == WRITE) && (dc->dev_write)) {
-		bio->bi_bdev = dc->dev_write->bdev;
+		bio_set_dev(bio, dc->dev_write->bdev);
 		if (bio_sectors(bio))
 			bio->bi_iter.bi_sector = dc->start_write +
 				dm_target_offset(ti, bio->bi_iter.bi_sector);
@@ -290,7 +290,7 @@ static int delay_map(struct dm_target *ti, struct bio *bio)
 		return delay_bio(dc, dc->write_delay, bio);
 	}
 
-	bio->bi_bdev = dc->dev_read->bdev;
+	bio_set_dev(bio, dc->dev_read->bdev);
 	bio->bi_iter.bi_sector = dc->start_read +
 		dm_target_offset(ti, bio->bi_iter.bi_sector);
 
diff --git a/drivers/md/dm-era-target.c b/drivers/md/dm-era-target.c
index e7ba89f98d8d..ba84b8d62cd0 100644
--- a/drivers/md/dm-era-target.c
+++ b/drivers/md/dm-era-target.c
@@ -1192,7 +1192,7 @@ static dm_block_t get_block(struct era *era, struct bio *bio)
 
 static void remap_to_origin(struct era *era, struct bio *bio)
 {
-	bio->bi_bdev = era->origin_dev->bdev;
+	bio_set_dev(bio, era->origin_dev->bdev);
 }
 
 /*----------------------------------------------------------------
diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c
index e2c7234931bc..7146c2d9762d 100644
--- a/drivers/md/dm-flakey.c
+++ b/drivers/md/dm-flakey.c
@@ -274,7 +274,7 @@ static void flakey_map_bio(struct dm_target *ti, struct bio *bio)
 {
 	struct flakey_c *fc = ti->private;
 
-	bio->bi_bdev = fc->dev->bdev;
+	bio_set_dev(bio, fc->dev->bdev);
 	if (bio_sectors(bio) || bio_op(bio) == REQ_OP_ZONE_RESET)
 		bio->bi_iter.bi_sector =
 			flakey_map_sector(ti, bio->bi_iter.bi_sector);
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 3acce09bba35..27c0f223f8ea 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -250,7 +250,8 @@ struct dm_integrity_io {
 
 	struct completion *completion;
 
-	struct block_device *orig_bi_bdev;
+	struct gendisk *orig_bi_disk;
+	u8 orig_bi_partno;
 	bio_end_io_t *orig_bi_end_io;
 	struct bio_integrity_payload *orig_bi_integrity;
 	struct bvec_iter orig_bi_iter;
@@ -1164,7 +1165,8 @@ static void integrity_end_io(struct bio *bio)
 	struct dm_integrity_io *dio = dm_per_bio_data(bio, sizeof(struct dm_integrity_io));
 
 	bio->bi_iter = dio->orig_bi_iter;
-	bio->bi_bdev = dio->orig_bi_bdev;
+	bio->bi_disk = dio->orig_bi_disk;
+	bio->bi_partno = dio->orig_bi_partno;
 	if (dio->orig_bi_integrity) {
 		bio->bi_integrity = dio->orig_bi_integrity;
 		bio->bi_opf |= REQ_INTEGRITY;
@@ -1681,8 +1683,9 @@ static void dm_integrity_map_continue(struct dm_integrity_io *dio, bool from_map
 
 	dio->orig_bi_iter = bio->bi_iter;
 
-	dio->orig_bi_bdev = bio->bi_bdev;
-	bio->bi_bdev = ic->dev->bdev;
+	dio->orig_bi_disk = bio->bi_disk;
+	dio->orig_bi_partno = bio->bi_partno;
+	bio_set_dev(bio, ic->dev->bdev);
 
 	dio->orig_bi_integrity = bio_integrity(bio);
 	bio->bi_integrity = NULL;
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 25039607f3cb..b4357ed4d541 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -347,7 +347,7 @@ static void do_region(int op, int op_flags, unsigned region,
 
 		bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, io->client->bios);
 		bio->bi_iter.bi_sector = where->sector + (where->count - remaining);
-		bio->bi_bdev = where->bdev;
+		bio_set_dev(bio, where->bdev);
 		bio->bi_end_io = endio;
 		bio_set_op_attrs(bio, op, op_flags);
 		store_io_and_region_in_bio(bio, io, region);
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index 41971a090e34..405eca206d67 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -88,7 +88,7 @@ static void linear_map_bio(struct dm_target *ti, struct bio *bio)
 {
 	struct linear_c *lc = ti->private;
 
-	bio->bi_bdev = lc->dev->bdev;
+	bio_set_dev(bio, lc->dev->bdev);
 	if (bio_sectors(bio) || bio_op(bio) == REQ_OP_ZONE_RESET)
 		bio->bi_iter.bi_sector =
 			linear_map_sector(ti, bio->bi_iter.bi_sector);
diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index a1da0eb58a93..534a254eb977 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -198,7 +198,7 @@ static int write_metadata(struct log_writes_c *lc, void *entry,
 	}
 	bio->bi_iter.bi_size = 0;
 	bio->bi_iter.bi_sector = sector;
-	bio->bi_bdev = lc->logdev->bdev;
+	bio_set_dev(bio, lc->logdev->bdev);
 	bio->bi_end_io = log_end_io;
 	bio->bi_private = lc;
 	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
@@ -263,7 +263,7 @@ static int log_one_block(struct log_writes_c *lc,
 	}
 	bio->bi_iter.bi_size = 0;
 	bio->bi_iter.bi_sector = sector;
-	bio->bi_bdev = lc->logdev->bdev;
+	bio_set_dev(bio, lc->logdev->bdev);
 	bio->bi_end_io = log_end_io;
 	bio->bi_private = lc;
 	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
@@ -285,7 +285,7 @@ static int log_one_block(struct log_writes_c *lc,
 			}
 			bio->bi_iter.bi_size = 0;
 			bio->bi_iter.bi_sector = sector;
-			bio->bi_bdev = lc->logdev->bdev;
+			bio_set_dev(bio, lc->logdev->bdev);
 			bio->bi_end_io = log_end_io;
 			bio->bi_private = lc;
 			bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
@@ -539,7 +539,7 @@ static void normal_map_bio(struct dm_target *ti, struct bio *bio)
 {
 	struct log_writes_c *lc = ti->private;
 
-	bio->bi_bdev = lc->dev->bdev;
+	bio_set_dev(bio, lc->dev->bdev);
 }
 
 static int log_writes_map(struct dm_target *ti, struct bio *bio)
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 0e8ab5bb3575..573046bd5c46 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -566,7 +566,7 @@ static int __multipath_map_bio(struct multipath *m, struct bio *bio, struct dm_m
 	mpio->nr_bytes = nr_bytes;
 
 	bio->bi_status = 0;
-	bio->bi_bdev = pgpath->path.dev->bdev;
+	bio_set_dev(bio, pgpath->path.dev->bdev);
 	bio->bi_opf |= REQ_FAILFAST_TRANSPORT;
 
 	if (pgpath->pg->ps.type->start_io)
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index a4fbd911d566..c0b82136b2d1 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_bdev == NULL, details were not saved */
+	/* if details->bi_disk == NULL, details were not saved */
 	struct dm_bio_details details;
 	region_t write_region;
 };
@@ -464,7 +464,7 @@ static sector_t map_sector(struct mirror *m, struct bio *bio)
 
 static void map_bio(struct mirror *m, struct bio *bio)
 {
-	bio->bi_bdev = m->dev->bdev;
+	bio_set_dev(bio, m->dev->bdev);
 	bio->bi_iter.bi_sector = map_sector(m, bio);
 }
 
@@ -1199,7 +1199,7 @@ 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_bdev = NULL;
+	bio_record->details.bi_disk = NULL;
 
 	if (rw == WRITE) {
 		/* Save region for mirror_end_io() handler */
@@ -1266,7 +1266,7 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio,
 		goto out;
 
 	if (unlikely(*error)) {
-		if (!bio_record->details.bi_bdev) {
+		if (!bio_record->details.bi_disk) {
 			/*
 			 * There wasn't enough memory to record necessary
 			 * information for a retry or there was no other
@@ -1291,7 +1291,7 @@ 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_bdev = NULL;
+			bio_record->details.bi_disk = NULL;
 			bio->bi_status = 0;
 
 			queue_bio(ms, bio, rw);
@@ -1301,7 +1301,7 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio,
 	}
 
 out:
-	bio_record->details.bi_bdev = NULL;
+	bio_record->details.bi_disk = NULL;
 
 	return DM_ENDIO_DONE;
 }
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 1ba41048b438..1113b42e1eda 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -1663,7 +1663,7 @@ __find_pending_exception(struct dm_snapshot *s,
 static void remap_exception(struct dm_snapshot *s, struct dm_exception *e,
 			    struct bio *bio, chunk_t chunk)
 {
-	bio->bi_bdev = s->cow->bdev;
+	bio_set_dev(bio, s->cow->bdev);
 	bio->bi_iter.bi_sector =
 		chunk_to_sector(s->store, dm_chunk_number(e->new_chunk) +
 				(chunk - e->old_chunk)) +
@@ -1681,7 +1681,7 @@ static int snapshot_map(struct dm_target *ti, struct bio *bio)
 	init_tracked_chunk(bio);
 
 	if (bio->bi_opf & REQ_PREFLUSH) {
-		bio->bi_bdev = s->cow->bdev;
+		bio_set_dev(bio, s->cow->bdev);
 		return DM_MAPIO_REMAPPED;
 	}
 
@@ -1769,7 +1769,7 @@ static int snapshot_map(struct dm_target *ti, struct bio *bio)
 			goto out;
 		}
 	} else {
-		bio->bi_bdev = s->origin->bdev;
+		bio_set_dev(bio, s->origin->bdev);
 		track_chunk(s, bio, chunk);
 	}
 
@@ -1802,9 +1802,9 @@ static int snapshot_merge_map(struct dm_target *ti, struct bio *bio)
 
 	if (bio->bi_opf & REQ_PREFLUSH) {
 		if (!dm_bio_get_target_bio_nr(bio))
-			bio->bi_bdev = s->origin->bdev;
+			bio_set_dev(bio, s->origin->bdev);
 		else
-			bio->bi_bdev = s->cow->bdev;
+			bio_set_dev(bio, s->cow->bdev);
 		return DM_MAPIO_REMAPPED;
 	}
 
@@ -1824,7 +1824,7 @@ static int snapshot_merge_map(struct dm_target *ti, struct bio *bio)
 		    chunk >= s->first_merging_chunk &&
 		    chunk < (s->first_merging_chunk +
 			     s->num_merging_chunks)) {
-			bio->bi_bdev = s->origin->bdev;
+			bio_set_dev(bio, s->origin->bdev);
 			bio_list_add(&s->bios_queued_during_merge, bio);
 			r = DM_MAPIO_SUBMITTED;
 			goto out_unlock;
@@ -1838,7 +1838,7 @@ static int snapshot_merge_map(struct dm_target *ti, struct bio *bio)
 	}
 
 redirect_to_origin:
-	bio->bi_bdev = s->origin->bdev;
+	bio_set_dev(bio, s->origin->bdev);
 
 	if (bio_data_dir(bio) == WRITE) {
 		up_write(&s->lock);
@@ -2285,7 +2285,7 @@ static int origin_map(struct dm_target *ti, struct bio *bio)
 	struct dm_origin *o = ti->private;
 	unsigned available_sectors;
 
-	bio->bi_bdev = o->dev->bdev;
+	bio_set_dev(bio, o->dev->bdev);
 
 	if (unlikely(bio->bi_opf & REQ_PREFLUSH))
 		return DM_MAPIO_REMAPPED;
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index a0375530b07f..ab50d7c4377f 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -270,7 +270,7 @@ static int stripe_map_range(struct stripe_c *sc, struct bio *bio,
 	stripe_map_range_sector(sc, bio_end_sector(bio),
 				target_stripe, &end);
 	if (begin < end) {
-		bio->bi_bdev = sc->stripe[target_stripe].dev->bdev;
+		bio_set_dev(bio, sc->stripe[target_stripe].dev->bdev);
 		bio->bi_iter.bi_sector = begin +
 			sc->stripe[target_stripe].physical_start;
 		bio->bi_iter.bi_size = to_bytes(end - begin);
@@ -291,7 +291,7 @@ static int stripe_map(struct dm_target *ti, struct bio *bio)
 	if (bio->bi_opf & REQ_PREFLUSH) {
 		target_bio_nr = dm_bio_get_target_bio_nr(bio);
 		BUG_ON(target_bio_nr >= sc->stripes);
-		bio->bi_bdev = sc->stripe[target_bio_nr].dev->bdev;
+		bio_set_dev(bio, sc->stripe[target_bio_nr].dev->bdev);
 		return DM_MAPIO_REMAPPED;
 	}
 	if (unlikely(bio_op(bio) == REQ_OP_DISCARD) ||
@@ -306,7 +306,7 @@ static int stripe_map(struct dm_target *ti, struct bio *bio)
 			  &stripe, &bio->bi_iter.bi_sector);
 
 	bio->bi_iter.bi_sector += sc->stripe[stripe].physical_start;
-	bio->bi_bdev = sc->stripe[stripe].dev->bdev;
+	bio_set_dev(bio, sc->stripe[stripe].dev->bdev);
 
 	return DM_MAPIO_REMAPPED;
 }
@@ -430,9 +430,7 @@ static int stripe_end_io(struct dm_target *ti, struct bio *bio,
 		return DM_ENDIO_DONE;
 
 	memset(major_minor, 0, sizeof(major_minor));
-	sprintf(major_minor, "%d:%d",
-		MAJOR(disk_devt(bio->bi_bdev->bd_disk)),
-		MINOR(disk_devt(bio->bi_bdev->bd_disk)));
+	sprintf(major_minor, "%d:%d", MAJOR(bio_dev(bio)), MINOR(bio_dev(bio)));
 
 	/*
 	 * Test to see which stripe drive triggered the event
diff --git a/drivers/md/dm-switch.c b/drivers/md/dm-switch.c
index 871c18fe000d..2dcea4c56f37 100644
--- a/drivers/md/dm-switch.c
+++ b/drivers/md/dm-switch.c
@@ -322,7 +322,7 @@ static int switch_map(struct dm_target *ti, struct bio *bio)
 	sector_t offset = dm_target_offset(ti, bio->bi_iter.bi_sector);
 	unsigned path_nr = switch_get_path_nr(sctx, offset);
 
-	bio->bi_bdev = sctx->path_list[path_nr].dmdev->bdev;
+	bio_set_dev(bio, sctx->path_list[path_nr].dmdev->bdev);
 	bio->bi_iter.bi_sector = sctx->path_list[path_nr].start + offset;
 
 	return DM_MAPIO_REMAPPED;
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 9dec2f8cc739..69d88aee3055 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -679,7 +679,7 @@ static void remap(struct thin_c *tc, struct bio *bio, dm_block_t block)
 	struct pool *pool = tc->pool;
 	sector_t bi_sector = bio->bi_iter.bi_sector;
 
-	bio->bi_bdev = tc->pool_dev->bdev;
+	bio_set_dev(bio, tc->pool_dev->bdev);
 	if (block_size_is_power_of_two(pool))
 		bio->bi_iter.bi_sector =
 			(block << pool->sectors_per_block_shift) |
@@ -691,7 +691,7 @@ static void remap(struct thin_c *tc, struct bio *bio, dm_block_t block)
 
 static void remap_to_origin(struct thin_c *tc, struct bio *bio)
 {
-	bio->bi_bdev = tc->origin_dev->bdev;
+	bio_set_dev(bio, tc->origin_dev->bdev);
 }
 
 static int bio_triggers_commit(struct thin_c *tc, struct bio *bio)
@@ -3313,7 +3313,7 @@ static int pool_map(struct dm_target *ti, struct bio *bio)
 	 * As this is a singleton target, ti->begin is always zero.
 	 */
 	spin_lock_irqsave(&pool->lock, flags);
-	bio->bi_bdev = pt->data_dev->bdev;
+	bio_set_dev(bio, pt->data_dev->bdev);
 	r = DM_MAPIO_REMAPPED;
 	spin_unlock_irqrestore(&pool->lock, flags);
 
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index b46705ebf01f..1c5b6185c79d 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -637,7 +637,7 @@ static int verity_map(struct dm_target *ti, struct bio *bio)
 	struct dm_verity *v = ti->private;
 	struct dm_verity_io *io;
 
-	bio->bi_bdev = v->data_dev->bdev;
+	bio_set_dev(bio, v->data_dev->bdev);
 	bio->bi_iter.bi_sector = verity_map_sector(v, bio->bi_iter.bi_sector);
 
 	if (((unsigned)bio->bi_iter.bi_sector | bio_sectors(bio)) &
diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c
index a4fa2ada6883..70485de37b66 100644
--- a/drivers/md/dm-zoned-metadata.c
+++ b/drivers/md/dm-zoned-metadata.c
@@ -409,7 +409,7 @@ static struct dmz_mblock *dmz_fetch_mblock(struct dmz_metadata *zmd,
 	}
 
 	bio->bi_iter.bi_sector = dmz_blk2sect(block);
-	bio->bi_bdev = zmd->dev->bdev;
+	bio_set_dev(bio, zmd->dev->bdev);
 	bio->bi_private = mblk;
 	bio->bi_end_io = dmz_mblock_bio_end_io;
 	bio_set_op_attrs(bio, REQ_OP_READ, REQ_META | REQ_PRIO);
@@ -564,7 +564,7 @@ static void dmz_write_mblock(struct dmz_metadata *zmd, struct dmz_mblock *mblk,
 	set_bit(DMZ_META_WRITING, &mblk->state);
 
 	bio->bi_iter.bi_sector = dmz_blk2sect(block);
-	bio->bi_bdev = zmd->dev->bdev;
+	bio_set_dev(bio, zmd->dev->bdev);
 	bio->bi_private = mblk;
 	bio->bi_end_io = dmz_mblock_bio_end_io;
 	bio_set_op_attrs(bio, REQ_OP_WRITE, REQ_META | REQ_PRIO);
@@ -586,7 +586,7 @@ static int dmz_rdwr_block(struct dmz_metadata *zmd, int op, sector_t block,
 		return -ENOMEM;
 
 	bio->bi_iter.bi_sector = dmz_blk2sect(block);
-	bio->bi_bdev = zmd->dev->bdev;
+	bio_set_dev(bio, zmd->dev->bdev);
 	bio_set_op_attrs(bio, op, REQ_SYNC | REQ_META | REQ_PRIO);
 	bio_add_page(bio, page, DMZ_BLOCK_SIZE, 0);
 	ret = submit_bio_wait(bio);
diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c
index b08bbbd4d902..b87c1741da4b 100644
--- a/drivers/md/dm-zoned-target.c
+++ b/drivers/md/dm-zoned-target.c
@@ -238,7 +238,7 @@ static void dmz_submit_write_bio(struct dmz_target *dmz, struct dm_zone *zone,
 	struct dmz_bioctx *bioctx = dm_per_bio_data(bio, sizeof(struct dmz_bioctx));
 
 	/* Setup and submit the BIO */
-	bio->bi_bdev = dmz->dev->bdev;
+	bio_set_dev(bio, dmz->dev->bdev);
 	bio->bi_iter.bi_sector = dmz_start_sect(dmz->metadata, zone) + dmz_blk2sect(chunk_block);
 	atomic_inc(&bioctx->ref);
 	generic_make_request(bio);
@@ -586,7 +586,7 @@ static int dmz_map(struct dm_target *ti, struct bio *bio)
 		      (unsigned long long)dmz_chunk_block(dmz->dev, dmz_bio_block(bio)),
 		      (unsigned int)dmz_bio_blocks(bio));
 
-	bio->bi_bdev = dev->bdev;
+	bio_set_dev(bio, dev->bdev);
 
 	if (!nr_sectors && bio_op(bio) != REQ_OP_WRITE)
 		return DM_MAPIO_REMAPPED;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 8612a2d1ccd9..b28b9ce8f4ff 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -851,10 +851,10 @@ static void clone_endio(struct bio *bio)
 
 	if (unlikely(error == BLK_STS_TARGET)) {
 		if (bio_op(bio) == REQ_OP_WRITE_SAME &&
-		    !bdev_get_queue(bio->bi_bdev)->limits.max_write_same_sectors)
+		    !bio->bi_disk->queue->limits.max_write_same_sectors)
 			disable_write_same(md);
 		if (bio_op(bio) == REQ_OP_WRITE_ZEROES &&
-		    !bdev_get_queue(bio->bi_bdev)->limits.max_write_zeroes_sectors)
+		    !bio->bi_disk->queue->limits.max_write_zeroes_sectors)
 			disable_write_zeroes(md);
 	}
 
@@ -1215,8 +1215,8 @@ static void __map_bio(struct dm_target_io *tio)
 		break;
 	case DM_MAPIO_REMAPPED:
 		/* the bio has been remapped so dispatch it */
-		trace_block_bio_remap(bdev_get_queue(clone->bi_bdev), clone,
-				      tio->io->bio->bi_bdev->bd_dev, sector);
+		trace_block_bio_remap(clone->bi_disk->queue, clone,
+				      bio_dev(tio->io->bio), sector);
 		generic_make_request(clone);
 		break;
 	case DM_MAPIO_KILL:
@@ -1796,7 +1796,7 @@ static struct mapped_device *alloc_dev(int minor)
 		goto bad;
 
 	bio_init(&md->flush_bio, NULL, 0);
-	md->flush_bio.bi_bdev = md->bdev;
+	bio_set_dev(&md->flush_bio, md->bdev);
 	md->flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
 
 	dm_stats_init(&md->stats);
diff --git a/drivers/md/faulty.c b/drivers/md/faulty.c
index 06a64d5d8c6c..38264b38420f 100644
--- a/drivers/md/faulty.c
+++ b/drivers/md/faulty.c
@@ -216,12 +216,12 @@ static bool faulty_make_request(struct mddev *mddev, struct bio *bio)
 	if (failit) {
 		struct bio *b = bio_clone_fast(bio, GFP_NOIO, mddev->bio_set);
 
-		b->bi_bdev = conf->rdev->bdev;
+		bio_set_dev(b, conf->rdev->bdev);
 		b->bi_private = bio;
 		b->bi_end_io = faulty_fail;
 		bio = b;
 	} else
-		bio->bi_bdev = conf->rdev->bdev;
+		bio_set_dev(bio, conf->rdev->bdev);
 
 	generic_make_request(bio);
 	return true;
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 5f1eb9189542..c464fb48039a 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -275,17 +275,17 @@ static bool linear_make_request(struct mddev *mddev, struct bio *bio)
 		bio = split;
 	}
 
-	bio->bi_bdev = tmp_dev->rdev->bdev;
+	bio_set_dev(bio, tmp_dev->rdev->bdev);
 	bio->bi_iter.bi_sector = bio->bi_iter.bi_sector -
 		start_sector + data_offset;
 
 	if (unlikely((bio_op(bio) == REQ_OP_DISCARD) &&
-		     !blk_queue_discard(bdev_get_queue(bio->bi_bdev)))) {
+		     !blk_queue_discard(bio->bi_disk->queue))) {
 		/* Just ignore it */
 		bio_endio(bio);
 	} else {
 		if (mddev->gendisk)
-			trace_block_bio_remap(bdev_get_queue(bio->bi_bdev),
+			trace_block_bio_remap(bio->bi_disk->queue,
 					      bio, disk_devt(mddev->gendisk),
 					      bio_sector);
 		mddev_check_writesame(mddev, bio);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index c99634612fc4..0afdc1bfd7cb 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -422,7 +422,7 @@ static void submit_flushes(struct work_struct *ws)
 			bi = bio_alloc_mddev(GFP_NOIO, 0, mddev);
 			bi->bi_end_io = md_end_flush;
 			bi->bi_private = rdev;
-			bi->bi_bdev = rdev->bdev;
+			bio_set_dev(bi, rdev->bdev);
 			bi->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
 			atomic_inc(&mddev->flush_pending);
 			submit_bio(bi);
@@ -772,7 +772,7 @@ void md_super_write(struct mddev *mddev, struct md_rdev *rdev,
 
 	atomic_inc(&rdev->nr_pending);
 
-	bio->bi_bdev = rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev;
+	bio_set_dev(bio, rdev->meta_bdev ? rdev->meta_bdev : rdev->bdev);
 	bio->bi_iter.bi_sector = sector;
 	bio_add_page(bio, page, size, 0);
 	bio->bi_private = rdev;
@@ -803,8 +803,10 @@ int sync_page_io(struct md_rdev *rdev, sector_t sector, int size,
 	struct bio *bio = md_bio_alloc_sync(rdev->mddev);
 	int ret;
 
-	bio->bi_bdev = (metadata_op && rdev->meta_bdev) ?
-		rdev->meta_bdev : rdev->bdev;
+	if (metadata_op && rdev->meta_bdev)
+		bio_set_dev(bio, rdev->meta_bdev);
+	else
+		bio_set_dev(bio, rdev->bdev);
 	bio_set_op_attrs(bio, op, op_flags);
 	if (metadata_op)
 		bio->bi_iter.bi_sector = sector + rdev->sb_start;
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 09db03455801..c0d436fb88f0 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -509,6 +509,11 @@ static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sect
 	atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io);
 }
 
+static inline void md_sync_acct_bio(struct bio *bio, unsigned long nr_sectors)
+{
+	atomic_add(nr_sectors, &bio->bi_disk->sync_io);
+}
+
 struct md_personality
 {
 	char *name;
@@ -721,14 +726,14 @@ 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 &&
-	    !bdev_get_queue(bio->bi_bdev)->limits.max_write_same_sectors)
+	    !bio->bi_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 &&
-	    !bdev_get_queue(bio->bi_bdev)->limits.max_write_zeroes_sectors)
+	    !bio->bi_disk->queue->limits.max_write_zeroes_sectors)
 		mddev->queue->limits.max_write_zeroes_sectors = 0;
 }
 #endif /* _MD_MD_H */
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 23a162ba6c56..b68e0666b9b0 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -134,7 +134,7 @@ static bool multipath_make_request(struct mddev *mddev, struct bio * bio)
 	__bio_clone_fast(&mp_bh->bio, bio);
 
 	mp_bh->bio.bi_iter.bi_sector += multipath->rdev->data_offset;
-	mp_bh->bio.bi_bdev = multipath->rdev->bdev;
+	bio_set_dev(&mp_bh->bio, multipath->rdev->bdev);
 	mp_bh->bio.bi_opf |= REQ_FAILFAST_TRANSPORT;
 	mp_bh->bio.bi_end_io = multipath_end_request;
 	mp_bh->bio.bi_private = mp_bh;
@@ -345,17 +345,17 @@ static void multipathd(struct md_thread *thread)
 
 		if ((mp_bh->path = multipath_map (conf))<0) {
 			pr_err("multipath: %s: unrecoverable IO read error for block %llu\n",
-			       bdevname(bio->bi_bdev,b),
+			       bio_devname(bio, b),
 			       (unsigned long long)bio->bi_iter.bi_sector);
 			multipath_end_bh_io(mp_bh, BLK_STS_IOERR);
 		} else {
 			pr_err("multipath: %s: redirecting sector %llu to another IO path\n",
-			       bdevname(bio->bi_bdev,b),
+			       bio_devname(bio, b),
 			       (unsigned long long)bio->bi_iter.bi_sector);
 			*bio = *(mp_bh->master_bio);
 			bio->bi_iter.bi_sector +=
 				conf->multipaths[mp_bh->path].rdev->data_offset;
-			bio->bi_bdev = conf->multipaths[mp_bh->path].rdev->bdev;
+			bio_set_dev(bio, conf->multipaths[mp_bh->path].rdev->bdev);
 			bio->bi_opf |= REQ_FAILFAST_TRANSPORT;
 			bio->bi_end_io = multipath_end_request;
 			bio->bi_private = mp_bh;
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 94d9ae9b0fd0..05a4521b832f 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -588,14 +588,13 @@ static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
 
 	zone = find_zone(mddev->private, &sector);
 	tmp_dev = map_sector(mddev, zone, sector, &sector);
-	bio->bi_bdev = tmp_dev->bdev;
+	bio_set_dev(bio, tmp_dev->bdev);
 	bio->bi_iter.bi_sector = sector + zone->dev_start +
 		tmp_dev->data_offset;
 
 	if (mddev->gendisk)
-		trace_block_bio_remap(bdev_get_queue(bio->bi_bdev),
-				      bio, disk_devt(mddev->gendisk),
-				      bio_sector);
+		trace_block_bio_remap(bio->bi_disk->queue, bio,
+				disk_devt(mddev->gendisk), bio_sector);
 	mddev_check_writesame(mddev, bio);
 	mddev_check_write_zeroes(mddev, bio);
 	generic_make_request(bio);
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index f50958ded9f0..baf5e358d22a 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -786,13 +786,13 @@ 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_bdev;
+		struct md_rdev *rdev = (void *)bio->bi_disk;
 		bio->bi_next = NULL;
-		bio->bi_bdev = rdev->bdev;
+		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(bdev_get_queue(bio->bi_bdev))))
+				    !blk_queue_discard(bio->bi_disk->queue)))
 			/* Just ignore it */
 			bio_endio(bio);
 		else
@@ -1273,7 +1273,7 @@ static void raid1_read_request(struct mddev *mddev, struct bio *bio,
 
 	read_bio->bi_iter.bi_sector = r1_bio->sector +
 		mirror->rdev->data_offset;
-	read_bio->bi_bdev = mirror->rdev->bdev;
+	bio_set_dev(read_bio, mirror->rdev->bdev);
 	read_bio->bi_end_io = raid1_end_read_request;
 	bio_set_op_attrs(read_bio, op, do_sync);
 	if (test_bit(FailFast, &mirror->rdev->flags) &&
@@ -1282,9 +1282,8 @@ static void raid1_read_request(struct mddev *mddev, struct bio *bio,
 	read_bio->bi_private = r1_bio;
 
 	if (mddev->gendisk)
-	        trace_block_bio_remap(bdev_get_queue(read_bio->bi_bdev),
-	                              read_bio, disk_devt(mddev->gendisk),
-	                              r1_bio->sector);
+	        trace_block_bio_remap(read_bio->bi_disk->queue, read_bio,
+				disk_devt(mddev->gendisk), r1_bio->sector);
 
 	generic_make_request(read_bio);
 }
@@ -1496,7 +1495,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 
 		mbio->bi_iter.bi_sector	= (r1_bio->sector +
 				   conf->mirrors[i].rdev->data_offset);
-		mbio->bi_bdev = conf->mirrors[i].rdev->bdev;
+		bio_set_dev(mbio, conf->mirrors[i].rdev->bdev);
 		mbio->bi_end_io	= raid1_end_write_request;
 		mbio->bi_opf = bio_op(bio) | (bio->bi_opf & (REQ_SYNC | REQ_FUA));
 		if (test_bit(FailFast, &conf->mirrors[i].rdev->flags) &&
@@ -1508,11 +1507,11 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 		atomic_inc(&r1_bio->remaining);
 
 		if (mddev->gendisk)
-			trace_block_bio_remap(bdev_get_queue(mbio->bi_bdev),
+			trace_block_bio_remap(mbio->bi_disk->queue,
 					      mbio, disk_devt(mddev->gendisk),
 					      r1_bio->sector);
 		/* flush_pending_writes() needs access to the rdev so...*/
-		mbio->bi_bdev = (void*)conf->mirrors[i].rdev;
+		mbio->bi_disk = (void *)conf->mirrors[i].rdev;
 
 		cb = blk_check_plugged(raid1_unplug, mddev, sizeof(*plug));
 		if (cb)
@@ -1990,8 +1989,7 @@ static int fix_sync_read_error(struct r1bio *r1_bio)
 			 * Don't fail devices as that won't really help.
 			 */
 			pr_crit_ratelimited("md/raid1:%s: %s: unrecoverable I/O read error for block %llu\n",
-					    mdname(mddev),
-					    bdevname(bio->bi_bdev, b),
+					    mdname(mddev), bio_devname(bio, b),
 					    (unsigned long long)r1_bio->sector);
 			for (d = 0; d < conf->raid_disks * 2; d++) {
 				rdev = conf->mirrors[d].rdev;
@@ -2082,7 +2080,7 @@ static void process_checks(struct r1bio *r1_bio)
 		b->bi_status = status;
 		b->bi_iter.bi_sector = r1_bio->sector +
 			conf->mirrors[i].rdev->data_offset;
-		b->bi_bdev = conf->mirrors[i].rdev->bdev;
+		bio_set_dev(b, conf->mirrors[i].rdev->bdev);
 		b->bi_end_io = end_sync_read;
 		rp->raid_bio = r1_bio;
 		b->bi_private = rp;
@@ -2350,7 +2348,7 @@ static int narrow_write_error(struct r1bio *r1_bio, int i)
 
 		bio_trim(wbio, sector - r1_bio->sector, sectors);
 		wbio->bi_iter.bi_sector += rdev->data_offset;
-		wbio->bi_bdev = rdev->bdev;
+		bio_set_dev(wbio, rdev->bdev);
 
 		if (submit_bio_wait(wbio) < 0)
 			/* failure! */
@@ -2440,7 +2438,6 @@ static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio)
 	struct mddev *mddev = conf->mddev;
 	struct bio *bio;
 	struct md_rdev *rdev;
-	dev_t bio_dev;
 	sector_t bio_sector;
 
 	clear_bit(R1BIO_ReadError, &r1_bio->state);
@@ -2454,7 +2451,6 @@ static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio)
 	 */
 
 	bio = r1_bio->bios[r1_bio->read_disk];
-	bio_dev = bio->bi_bdev->bd_dev;
 	bio_sector = conf->mirrors[r1_bio->read_disk].rdev->data_offset + r1_bio->sector;
 	bio_put(bio);
 	r1_bio->bios[r1_bio->read_disk] = NULL;
@@ -2727,7 +2723,7 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 		if (bio->bi_end_io) {
 			atomic_inc(&rdev->nr_pending);
 			bio->bi_iter.bi_sector = sector_nr + rdev->data_offset;
-			bio->bi_bdev = rdev->bdev;
+			bio_set_dev(bio, rdev->bdev);
 			if (test_bit(FailFast, &rdev->flags))
 				bio->bi_opf |= MD_FAILFAST;
 		}
@@ -2853,7 +2849,7 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 			bio = r1_bio->bios[i];
 			if (bio->bi_end_io == end_sync_read) {
 				read_targets--;
-				md_sync_acct(bio->bi_bdev, nr_sectors);
+				md_sync_acct_bio(bio, nr_sectors);
 				if (read_targets == 1)
 					bio->bi_opf &= ~MD_FAILFAST;
 				generic_make_request(bio);
@@ -2862,7 +2858,7 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 	} else {
 		atomic_set(&r1_bio->remaining, 1);
 		bio = r1_bio->bios[r1_bio->read_disk];
-		md_sync_acct(bio->bi_bdev, nr_sectors);
+		md_sync_acct_bio(bio, nr_sectors);
 		if (read_targets == 1)
 			bio->bi_opf &= ~MD_FAILFAST;
 		generic_make_request(bio);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index f55d4cc085f6..d1f948e371e0 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -901,13 +901,13 @@ 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_bdev;
+			struct md_rdev *rdev = (void*)bio->bi_disk;
 			bio->bi_next = NULL;
-			bio->bi_bdev = rdev->bdev;
+			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(bdev_get_queue(bio->bi_bdev))))
+					    !blk_queue_discard(bio->bi_disk->queue)))
 				/* Just ignore it */
 				bio_endio(bio);
 			else
@@ -1085,13 +1085,13 @@ 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_bdev;
+		struct md_rdev *rdev = (void*)bio->bi_disk;
 		bio->bi_next = NULL;
-		bio->bi_bdev = rdev->bdev;
+		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(bdev_get_queue(bio->bi_bdev))))
+				    !blk_queue_discard(bio->bi_disk->queue)))
 			/* Just ignore it */
 			bio_endio(bio);
 		else
@@ -1200,7 +1200,7 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio,
 
 	read_bio->bi_iter.bi_sector = r10_bio->devs[slot].addr +
 		choose_data_offset(r10_bio, rdev);
-	read_bio->bi_bdev = rdev->bdev;
+	bio_set_dev(read_bio, rdev->bdev);
 	read_bio->bi_end_io = raid10_end_read_request;
 	bio_set_op_attrs(read_bio, op, do_sync);
 	if (test_bit(FailFast, &rdev->flags) &&
@@ -1209,7 +1209,7 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio,
 	read_bio->bi_private = r10_bio;
 
 	if (mddev->gendisk)
-	        trace_block_bio_remap(bdev_get_queue(read_bio->bi_bdev),
+	        trace_block_bio_remap(read_bio->bi_disk->queue,
 	                              read_bio, disk_devt(mddev->gendisk),
 	                              r10_bio->sector);
 	generic_make_request(read_bio);
@@ -1249,7 +1249,7 @@ static void raid10_write_one_disk(struct mddev *mddev, struct r10bio *r10_bio,
 
 	mbio->bi_iter.bi_sector	= (r10_bio->devs[n_copy].addr +
 				   choose_data_offset(r10_bio, rdev));
-	mbio->bi_bdev = rdev->bdev;
+	bio_set_dev(mbio, rdev->bdev);
 	mbio->bi_end_io	= raid10_end_write_request;
 	bio_set_op_attrs(mbio, op, do_sync | do_fua);
 	if (!replacement && test_bit(FailFast,
@@ -1259,11 +1259,11 @@ static void raid10_write_one_disk(struct mddev *mddev, struct r10bio *r10_bio,
 	mbio->bi_private = r10_bio;
 
 	if (conf->mddev->gendisk)
-		trace_block_bio_remap(bdev_get_queue(mbio->bi_bdev),
+		trace_block_bio_remap(mbio->bi_disk->queue,
 				      mbio, disk_devt(conf->mddev->gendisk),
 				      r10_bio->sector);
 	/* flush_pending_writes() needs access to the rdev so...*/
-	mbio->bi_bdev = (void *)rdev;
+	mbio->bi_disk = (void *)rdev;
 
 	atomic_inc(&r10_bio->remaining);
 
@@ -2094,7 +2094,7 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio)
 		if (test_bit(FailFast, &conf->mirrors[d].rdev->flags))
 			tbio->bi_opf |= MD_FAILFAST;
 		tbio->bi_iter.bi_sector += conf->mirrors[d].rdev->data_offset;
-		tbio->bi_bdev = conf->mirrors[d].rdev->bdev;
+		bio_set_dev(tbio, conf->mirrors[d].rdev->bdev);
 		generic_make_request(tbio);
 	}
 
@@ -2552,7 +2552,7 @@ static int narrow_write_error(struct r10bio *r10_bio, int i)
 		wsector = r10_bio->devs[i].addr + (sector - r10_bio->sector);
 		wbio->bi_iter.bi_sector = wsector +
 				   choose_data_offset(r10_bio, rdev);
-		wbio->bi_bdev = rdev->bdev;
+		bio_set_dev(wbio, rdev->bdev);
 		bio_set_op_attrs(wbio, REQ_OP_WRITE, 0);
 
 		if (submit_bio_wait(wbio) < 0)
@@ -2575,7 +2575,6 @@ static void handle_read_error(struct mddev *mddev, struct r10bio *r10_bio)
 	struct bio *bio;
 	struct r10conf *conf = mddev->private;
 	struct md_rdev *rdev = r10_bio->devs[slot].rdev;
-	dev_t bio_dev;
 	sector_t bio_last_sector;
 
 	/* we got a read error. Maybe the drive is bad.  Maybe just
@@ -2587,7 +2586,6 @@ static void handle_read_error(struct mddev *mddev, struct r10bio *r10_bio)
 	 * frozen.
 	 */
 	bio = r10_bio->devs[slot].bio;
-	bio_dev = bio->bi_bdev->bd_dev;
 	bio_last_sector = r10_bio->devs[slot].addr + rdev->data_offset + r10_bio->sectors;
 	bio_put(bio);
 	r10_bio->devs[slot].bio = NULL;
@@ -2950,7 +2948,7 @@ 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_bdev set,
+	 * have bi_end_io, bi_sector, bi_disk 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.
@@ -3095,7 +3093,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 				from_addr = r10_bio->devs[j].addr;
 				bio->bi_iter.bi_sector = from_addr +
 					rdev->data_offset;
-				bio->bi_bdev = rdev->bdev;
+				bio_set_dev(bio, rdev->bdev);
 				atomic_inc(&rdev->nr_pending);
 				/* and we write to 'i' (if not in_sync) */
 
@@ -3117,7 +3115,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 					bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 					bio->bi_iter.bi_sector = to_addr
 						+ mrdev->data_offset;
-					bio->bi_bdev = mrdev->bdev;
+					bio_set_dev(bio, mrdev->bdev);
 					atomic_inc(&r10_bio->remaining);
 				} else
 					r10_bio->devs[1].bio->bi_end_io = NULL;
@@ -3143,7 +3141,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 				bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 				bio->bi_iter.bi_sector = to_addr +
 					mreplace->data_offset;
-				bio->bi_bdev = mreplace->bdev;
+				bio_set_dev(bio, mreplace->bdev);
 				atomic_inc(&r10_bio->remaining);
 				break;
 			}
@@ -3289,7 +3287,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 			if (test_bit(FailFast, &rdev->flags))
 				bio->bi_opf |= MD_FAILFAST;
 			bio->bi_iter.bi_sector = sector + rdev->data_offset;
-			bio->bi_bdev = rdev->bdev;
+			bio_set_dev(bio, rdev->bdev);
 			count++;
 
 			rdev = rcu_dereference(conf->mirrors[d].replacement);
@@ -3311,7 +3309,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 			if (test_bit(FailFast, &rdev->flags))
 				bio->bi_opf |= MD_FAILFAST;
 			bio->bi_iter.bi_sector = sector + rdev->data_offset;
-			bio->bi_bdev = rdev->bdev;
+			bio_set_dev(bio, rdev->bdev);
 			count++;
 			rcu_read_unlock();
 		}
@@ -3367,7 +3365,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 		r10_bio->sectors = nr_sectors;
 
 		if (bio->bi_end_io == end_sync_read) {
-			md_sync_acct(bio->bi_bdev, nr_sectors);
+			md_sync_acct_bio(bio, nr_sectors);
 			bio->bi_status = 0;
 			generic_make_request(bio);
 		}
@@ -4383,7 +4381,7 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr,
 
 	read_bio = bio_alloc_mddev(GFP_KERNEL, RESYNC_PAGES, mddev);
 
-	read_bio->bi_bdev = rdev->bdev;
+	bio_set_dev(read_bio, rdev->bdev);
 	read_bio->bi_iter.bi_sector = (r10_bio->devs[r10_bio->read_slot].addr
 			       + rdev->data_offset);
 	read_bio->bi_private = r10_bio;
@@ -4417,7 +4415,7 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr,
 		if (!rdev2 || test_bit(Faulty, &rdev2->flags))
 			continue;
 
-		b->bi_bdev = rdev2->bdev;
+		bio_set_dev(b, rdev2->bdev);
 		b->bi_iter.bi_sector = r10_bio->devs[s/2].addr +
 			rdev2->new_data_offset;
 		b->bi_end_io = end_reshape_write;
@@ -4449,7 +4447,7 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr,
 	r10_bio->sectors = nr_sectors;
 
 	/* Now submit the read */
-	md_sync_acct(read_bio->bi_bdev, r10_bio->sectors);
+	md_sync_acct_bio(read_bio, r10_bio->sectors);
 	atomic_inc(&r10_bio->remaining);
 	read_bio->bi_next = NULL;
 	generic_make_request(read_bio);
@@ -4511,7 +4509,7 @@ static void reshape_request_write(struct mddev *mddev, struct r10bio *r10_bio)
 		}
 		atomic_inc(&rdev->nr_pending);
 		rcu_read_unlock();
-		md_sync_acct(b->bi_bdev, r10_bio->sectors);
+		md_sync_acct_bio(b, r10_bio->sectors);
 		atomic_inc(&r10_bio->remaining);
 		b->bi_next = NULL;
 		generic_make_request(b);
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index bfa1e907c472..f253a9c583c1 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -728,7 +728,7 @@ static struct bio *r5l_bio_alloc(struct r5l_log *log)
 	struct bio *bio = bio_alloc_bioset(GFP_NOIO, BIO_MAX_PAGES, log->bs);
 
 	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
-	bio->bi_bdev = log->rdev->bdev;
+	bio_set_dev(bio, log->rdev->bdev);
 	bio->bi_iter.bi_sector = log->rdev->data_offset + log->log_start;
 
 	return bio;
@@ -1291,7 +1291,7 @@ void r5l_flush_stripe_to_raid(struct r5l_log *log)
 	if (!do_flush)
 		return;
 	bio_reset(&log->flush_bio);
-	log->flush_bio.bi_bdev = log->rdev->bdev;
+	bio_set_dev(&log->flush_bio, log->rdev->bdev);
 	log->flush_bio.bi_end_io = r5l_log_flush_endio;
 	log->flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
 	submit_bio(&log->flush_bio);
@@ -1669,7 +1669,7 @@ static int r5l_recovery_fetch_ra_pool(struct r5l_log *log,
 				      sector_t offset)
 {
 	bio_reset(ctx->ra_bio);
-	ctx->ra_bio->bi_bdev = log->rdev->bdev;
+	bio_set_dev(ctx->ra_bio, log->rdev->bdev);
 	bio_set_op_attrs(ctx->ra_bio, REQ_OP_READ, 0);
 	ctx->ra_bio->bi_iter.bi_sector = log->rdev->data_offset + offset;
 
diff --git a/drivers/md/raid5-ppl.c b/drivers/md/raid5-ppl.c
index 44ad5baf3206..1e237c40d6fa 100644
--- a/drivers/md/raid5-ppl.c
+++ b/drivers/md/raid5-ppl.c
@@ -415,7 +415,7 @@ static void ppl_submit_iounit_bio(struct ppl_io_unit *io, struct bio *bio)
 	pr_debug("%s: seq: %llu size: %u sector: %llu dev: %s\n",
 		 __func__, io->seq, bio->bi_iter.bi_size,
 		 (unsigned long long)bio->bi_iter.bi_sector,
-		 bdevname(bio->bi_bdev, b));
+		 bio_devname(bio, b));
 
 	submit_bio(bio);
 }
@@ -453,7 +453,7 @@ static void ppl_submit_iounit(struct ppl_io_unit *io)
 
 	bio->bi_end_io = ppl_log_endio;
 	bio->bi_opf = REQ_OP_WRITE | REQ_FUA;
-	bio->bi_bdev = log->rdev->bdev;
+	bio_set_dev(bio, log->rdev->bdev);
 	bio->bi_iter.bi_sector = log->rdev->ppl.sector;
 	bio_add_page(bio, io->header_page, PAGE_SIZE, 0);
 
@@ -468,7 +468,7 @@ static void ppl_submit_iounit(struct ppl_io_unit *io)
 			bio = bio_alloc_bioset(GFP_NOIO, BIO_MAX_PAGES,
 					       ppl_conf->bs);
 			bio->bi_opf = prev->bi_opf;
-			bio->bi_bdev = prev->bi_bdev;
+			bio_copy_dev(bio, prev);
 			bio->bi_iter.bi_sector = bio_end_sector(prev);
 			bio_add_page(bio, sh->ppl_page, PAGE_SIZE, 0);
 
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index d687aeb1b538..3ae8bbceb6c4 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1096,7 +1096,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
 
 			set_bit(STRIPE_IO_STARTED, &sh->state);
 
-			bi->bi_bdev = rdev->bdev;
+			bio_set_dev(bi, rdev->bdev);
 			bio_set_op_attrs(bi, op, op_flags);
 			bi->bi_end_io = op_is_write(op)
 				? raid5_end_write_request
@@ -1145,7 +1145,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
 				set_bit(R5_DOUBLE_LOCKED, &sh->dev[i].flags);
 
 			if (conf->mddev->gendisk)
-				trace_block_bio_remap(bdev_get_queue(bi->bi_bdev),
+				trace_block_bio_remap(bi->bi_disk->queue,
 						      bi, disk_devt(conf->mddev->gendisk),
 						      sh->dev[i].sector);
 			if (should_defer && op_is_write(op))
@@ -1160,7 +1160,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
 
 			set_bit(STRIPE_IO_STARTED, &sh->state);
 
-			rbi->bi_bdev = rrdev->bdev;
+			bio_set_dev(rbi, rrdev->bdev);
 			bio_set_op_attrs(rbi, op, op_flags);
 			BUG_ON(!op_is_write(op));
 			rbi->bi_end_io = raid5_end_write_request;
@@ -1193,7 +1193,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
 			if (op == REQ_OP_DISCARD)
 				rbi->bi_vcnt = 0;
 			if (conf->mddev->gendisk)
-				trace_block_bio_remap(bdev_get_queue(rbi->bi_bdev),
+				trace_block_bio_remap(rbi->bi_disk->queue,
 						      rbi, disk_devt(conf->mddev->gendisk),
 						      sh->dev[i].sector);
 			if (should_defer && op_is_write(op))
@@ -5233,7 +5233,7 @@ static int raid5_read_one_chunk(struct mddev *mddev, struct bio *raid_bio)
 		atomic_inc(&rdev->nr_pending);
 		rcu_read_unlock();
 		raid_bio->bi_next = (void*)rdev;
-		align_bi->bi_bdev =  rdev->bdev;
+		bio_set_dev(align_bi, rdev->bdev);
 		bio_clear_flag(align_bi, BIO_SEG_VALID);
 
 		if (is_badblock(rdev, align_bi->bi_iter.bi_sector,
@@ -5255,7 +5255,7 @@ static int raid5_read_one_chunk(struct mddev *mddev, struct bio *raid_bio)
 		spin_unlock_irq(&conf->device_lock);
 
 		if (mddev->gendisk)
-			trace_block_bio_remap(bdev_get_queue(align_bi->bi_bdev),
+			trace_block_bio_remap(align_bi->bi_disk->queue,
 					      align_bi, disk_devt(mddev->gendisk),
 					      raid_bio->bi_iter.bi_sector);
 		generic_make_request(align_bi);
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 73062da3177f..a87f793f2945 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -390,7 +390,7 @@ int nd_region_activate(struct nd_region *nd_region);
 void __nd_iostat_start(struct bio *bio, unsigned long *start);
 static inline bool nd_iostat_start(struct bio *bio, unsigned long *start)
 {
-	struct gendisk *disk = bio->bi_bdev->bd_disk;
+	struct gendisk *disk = bio->bi_disk;
 
 	if (!blk_queue_io_stat(disk->queue))
 		return false;
@@ -402,7 +402,7 @@ static inline bool nd_iostat_start(struct bio *bio, unsigned long *start)
 }
 static inline void nd_iostat_end(struct bio *bio, unsigned long start)
 {
-	struct gendisk *disk = bio->bi_bdev->bd_disk;
+	struct gendisk *disk = bio->bi_disk;
 
 	generic_end_io_acct(disk->queue, bio_data_dir(bio), &disk->part0,
 				start);
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index c49f1f8b2e57..f03452db7938 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -613,11 +613,7 @@ int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd,
 
 		if (!disk)
 			goto submit;
-		bio->bi_bdev = bdget_disk(disk, 0);
-		if (!bio->bi_bdev) {
-			ret = -ENODEV;
-			goto out_unmap;
-		}
+		bio->bi_disk = disk;
 
 		if (meta_buffer && meta_len) {
 			struct bio_integrity_payload *bip;
@@ -668,11 +664,8 @@ int __nvme_submit_user_cmd(struct request_queue *q, struct nvme_command *cmd,
  out_free_meta:
 	kfree(meta);
  out_unmap:
-	if (bio) {
-		if (disk && bio->bi_bdev)
-			bdput(bio->bi_bdev);
+	if (bio)
 		blk_rq_unmap_user(bio);
-	}
  out:
 	blk_mq_free_request(req);
 	return ret;
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index be8541335e31..c1a28569e843 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -643,17 +643,9 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
 			vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma);
 		}
 
-		if (!disk)
-			goto submit;
-
-		bio->bi_bdev = bdget_disk(disk, 0);
-		if (!bio->bi_bdev) {
-			ret = -ENODEV;
-			goto err_meta;
-		}
+		bio->bi_disk = disk;
 	}
 
-submit:
 	blk_execute_rq(q, NULL, rq, 0);
 
 	if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
@@ -673,11 +665,8 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
 	if (meta_buf && meta_len)
 		dma_pool_free(dev->dma_pool, metadata, metadata_dma);
 err_map:
-	if (bio) {
-		if (disk && bio->bi_bdev)
-			bdput(bio->bi_bdev);
+	if (bio)
 		blk_rq_unmap_user(bio);
-	}
 err_ppa:
 	if (ppa_buf && ppa_len)
 		dma_pool_free(dev->dma_pool, ppa_list, ppa_dma);
diff --git a/drivers/nvme/target/io-cmd.c b/drivers/nvme/target/io-cmd.c
index 3b4d47a6abdb..0d4c23dc4532 100644
--- a/drivers/nvme/target/io-cmd.c
+++ b/drivers/nvme/target/io-cmd.c
@@ -68,7 +68,7 @@ static void nvmet_execute_rw(struct nvmet_req *req)
 
 	nvmet_inline_bio_init(req);
 	bio = &req->inline_bio;
-	bio->bi_bdev = req->ns->bdev;
+	bio_set_dev(bio, req->ns->bdev);
 	bio->bi_iter.bi_sector = sector;
 	bio->bi_private = req;
 	bio->bi_end_io = nvmet_bio_done;
@@ -80,7 +80,7 @@ static void nvmet_execute_rw(struct nvmet_req *req)
 			struct bio *prev = bio;
 
 			bio = bio_alloc(GFP_KERNEL, min(sg_cnt, BIO_MAX_PAGES));
-			bio->bi_bdev = req->ns->bdev;
+			bio_set_dev(bio, req->ns->bdev);
 			bio->bi_iter.bi_sector = sector;
 			bio_set_op_attrs(bio, op, op_flags);
 
@@ -104,7 +104,7 @@ static void nvmet_execute_flush(struct nvmet_req *req)
 	nvmet_inline_bio_init(req);
 	bio = &req->inline_bio;
 
-	bio->bi_bdev = req->ns->bdev;
+	bio_set_dev(bio, req->ns->bdev);
 	bio->bi_private = req;
 	bio->bi_end_io = nvmet_bio_done;
 	bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 68bae4f6bd88..7abb240847c0 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -856,14 +856,14 @@ dcssblk_make_request(struct request_queue *q, struct bio *bio)
 	blk_queue_split(q, &bio);
 
 	bytes_done = 0;
-	dev_info = bio->bi_bdev->bd_disk->private_data;
+	dev_info = bio->bi_disk->private_data;
 	if (dev_info == NULL)
 		goto fail;
 	if ((bio->bi_iter.bi_sector & 7) != 0 ||
 	    (bio->bi_iter.bi_size & 4095) != 0)
 		/* Request is not page-aligned. */
 		goto fail;
-	if (bio_end_sector(bio) > get_capacity(bio->bi_bdev->bd_disk)) {
+	if (bio_end_sector(bio) > get_capacity(bio->bi_disk)) {
 		/* Request beyond end of DCSS segment. */
 		goto fail;
 	}
diff --git a/drivers/s390/block/xpram.c b/drivers/s390/block/xpram.c
index a48f0d40c1d2..571a0709e1e5 100644
--- a/drivers/s390/block/xpram.c
+++ b/drivers/s390/block/xpram.c
@@ -183,7 +183,7 @@ static unsigned long xpram_highest_page_index(void)
  */
 static blk_qc_t xpram_make_request(struct request_queue *q, struct bio *bio)
 {
-	xpram_device_t *xdev = bio->bi_bdev->bd_disk->private_data;
+	xpram_device_t *xdev = bio->bi_disk->private_data;
 	struct bio_vec bvec;
 	struct bvec_iter iter;
 	unsigned int index;
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index ee7c7fa55dad..07c814c42648 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -338,7 +338,7 @@ iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num, int op,
 		return NULL;
 	}
 
-	bio->bi_bdev = ib_dev->ibd_bd;
+	bio_set_dev(bio, ib_dev->ibd_bd);
 	bio->bi_private = cmd;
 	bio->bi_end_io = &iblock_bio_done;
 	bio->bi_iter.bi_sector = lba;
@@ -395,7 +395,7 @@ iblock_execute_sync_cache(struct se_cmd *cmd)
 
 	bio = bio_alloc(GFP_KERNEL, 0);
 	bio->bi_end_io = iblock_end_io_flush;
-	bio->bi_bdev = ib_dev->ibd_bd;
+	bio_set_dev(bio, ib_dev->ibd_bd);
 	bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
 	if (!immed)
 		bio->bi_private = cmd;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index d29d1c70f833..bb715b2fcfb8 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -223,7 +223,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
 	}
 
 	bio_init(&bio, vecs, nr_pages);
-	bio.bi_bdev = bdev;
+	bio_set_dev(&bio, bdev);
 	bio.bi_iter.bi_sector = pos >> 9;
 	bio.bi_write_hint = iocb->ki_hint;
 	bio.bi_private = current;
@@ -362,7 +362,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
 
 	blk_start_plug(&plug);
 	for (;;) {
-		bio->bi_bdev = bdev;
+		bio_set_dev(bio, bdev);
 		bio->bi_iter.bi_sector = pos >> 9;
 		bio->bi_write_hint = iocb->ki_hint;
 		bio->bi_private = dio;
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 9d3854839038..fb07e3c22b9a 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -1635,7 +1635,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 		unsigned int j;
 
 		bio = btrfs_io_bio_alloc(num_pages - i);
-		bio->bi_bdev = block_ctx->dev->bdev;
+		bio_set_dev(bio, block_ctx->dev->bdev);
 		bio->bi_iter.bi_sector = dev_bytenr >> 9;
 		bio_set_op_attrs(bio, REQ_OP_READ, 0);
 
@@ -2803,7 +2803,7 @@ 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->bi_bdev->bd_dev);
+	dev_state = btrfsic_dev_state_lookup(bio_dev(bio));
 	if (NULL != dev_state &&
 	    (bio_op(bio) == REQ_OP_WRITE) && bio_has_data(bio)) {
 		unsigned int i = 0;
@@ -2819,10 +2819,10 @@ 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_bdev=%p)\n",
+			pr_info("submit_bio(rw=%d,0x%x, bi_vcnt=%u, bi_sector=%llu (bytenr %llu), bi_disk=%p)\n",
 			       bio_op(bio), bio->bi_opf, segs,
 			       (unsigned long long)bio->bi_iter.bi_sector,
-			       dev_bytenr, bio->bi_bdev);
+			       dev_bytenr, bio->bi_disk);
 
 		mapped_datav = kmalloc_array(segs,
 					     sizeof(*mapped_datav), GFP_NOFS);
@@ -2851,8 +2851,8 @@ 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, bdev=%p)\n",
-			       bio_op(bio), bio->bi_opf, bio->bi_bdev);
+			pr_info("submit_bio(rw=%d,0x%x FLUSH, disk=%p)\n",
+			       bio_op(bio), bio->bi_opf, bio->bi_disk);
 		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/disk-io.c b/fs/btrfs/disk-io.c
index 080e2ebb8aa0..0640c27e63e9 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3499,7 +3499,7 @@ static void write_dev_flush(struct btrfs_device *device)
 
 	bio_reset(bio);
 	bio->bi_end_io = btrfs_end_empty_barrier;
-	bio->bi_bdev = device->bdev;
+	bio_set_dev(bio, device->bdev);
 	bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH;
 	init_completion(&device->flush_wait);
 	bio->bi_private = &device->flush_wait;
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 0aff9b278c19..42b12a85ab49 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2033,7 +2033,7 @@ int repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
 		bio_put(bio);
 		return -EIO;
 	}
-	bio->bi_bdev = dev->bdev;
+	bio_set_dev(bio, dev->bdev);
 	bio->bi_opf = REQ_OP_WRITE | REQ_SYNC;
 	bio_add_page(bio, page, length, pg_offset);
 
@@ -2335,7 +2335,7 @@ struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio,
 	bio = btrfs_io_bio_alloc(1);
 	bio->bi_end_io = endio_func;
 	bio->bi_iter.bi_sector = failrec->logical >> 9;
-	bio->bi_bdev = fs_info->fs_devices->latest_bdev;
+	bio_set_dev(bio, fs_info->fs_devices->latest_bdev);
 	bio->bi_iter.bi_size = 0;
 	bio->bi_private = data;
 
@@ -2675,7 +2675,7 @@ struct bio *btrfs_bio_alloc(struct block_device *bdev, u64 first_byte)
 	struct bio *bio;
 
 	bio = bio_alloc_bioset(GFP_NOFS, BIO_MAX_PAGES, btrfs_bioset);
-	bio->bi_bdev = bdev;
+	bio_set_dev(bio, bdev);
 	bio->bi_iter.bi_sector = first_byte >> 9;
 	btrfs_io_bio_init(btrfs_io_bio(bio));
 	return bio;
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 208638384cd2..d268cb633735 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -1090,7 +1090,8 @@ static int rbio_add_io_page(struct btrfs_raid_bio *rbio,
 		 */
 		if (last_end == disk_start && stripe->dev->bdev &&
 		    !last->bi_status &&
-		    last->bi_bdev == stripe->dev->bdev) {
+		    last->bi_disk == stripe->dev->bdev->bd_disk &&
+		    last->bi_partno == stripe->dev->bdev->bd_partno) {
 			ret = bio_add_page(last, page, PAGE_SIZE, 0);
 			if (ret == PAGE_SIZE)
 				return 0;
@@ -1100,7 +1101,7 @@ static int rbio_add_io_page(struct btrfs_raid_bio *rbio,
 	/* put a new bio on the list */
 	bio = btrfs_io_bio_alloc(bio_max_len >> PAGE_SHIFT ?: 1);
 	bio->bi_iter.bi_size = 0;
-	bio->bi_bdev = stripe->dev->bdev;
+	bio_set_dev(bio, stripe->dev->bdev);
 	bio->bi_iter.bi_sector = disk_start >> 9;
 
 	bio_add_page(bio, page, PAGE_SIZE, 0);
@@ -1347,7 +1348,8 @@ static int find_bio_stripe(struct btrfs_raid_bio *rbio,
 		stripe_start = stripe->physical;
 		if (physical >= stripe_start &&
 		    physical < stripe_start + rbio->stripe_len &&
-		    bio->bi_bdev == stripe->dev->bdev) {
+		    bio->bi_disk == stripe->dev->bdev->bd_disk &&
+		    bio->bi_partno == stripe->dev->bdev->bd_partno) {
 			return i;
 		}
 	}
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 6f1e4c984b94..b0b71e8e4c36 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1738,7 +1738,7 @@ static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
 
 		WARN_ON(!page->page);
 		bio = btrfs_io_bio_alloc(1);
-		bio->bi_bdev = page->dev->bdev;
+		bio_set_dev(bio, page->dev->bdev);
 
 		bio_add_page(bio, page->page, PAGE_SIZE, 0);
 		if (!retry_failed_mirror && scrub_is_page_on_raid56(page)) {
@@ -1826,7 +1826,7 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
 		}
 
 		bio = btrfs_io_bio_alloc(1);
-		bio->bi_bdev = page_bad->dev->bdev;
+		bio_set_dev(bio, page_bad->dev->bdev);
 		bio->bi_iter.bi_sector = page_bad->physical >> 9;
 		bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 
@@ -1921,7 +1921,7 @@ static int scrub_add_page_to_wr_bio(struct scrub_ctx *sctx,
 
 		bio->bi_private = sbio;
 		bio->bi_end_io = scrub_wr_bio_end_io;
-		bio->bi_bdev = sbio->dev->bdev;
+		bio_set_dev(bio, sbio->dev->bdev);
 		bio->bi_iter.bi_sector = sbio->physical >> 9;
 		bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 		sbio->status = 0;
@@ -1964,7 +1964,7 @@ static void scrub_wr_submit(struct scrub_ctx *sctx)
 
 	sbio = sctx->wr_curr_bio;
 	sctx->wr_curr_bio = NULL;
-	WARN_ON(!sbio->bio->bi_bdev);
+	WARN_ON(!sbio->bio->bi_disk);
 	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
@@ -2321,7 +2321,7 @@ static int scrub_add_page_to_rd_bio(struct scrub_ctx *sctx,
 
 		bio->bi_private = sbio;
 		bio->bi_end_io = scrub_bio_end_io;
-		bio->bi_bdev = sbio->dev->bdev;
+		bio_set_dev(bio, sbio->dev->bdev);
 		bio->bi_iter.bi_sector = sbio->physical >> 9;
 		bio_set_op_attrs(bio, REQ_OP_READ, 0);
 		sbio->status = 0;
@@ -4627,7 +4627,7 @@ static int write_page_nocow(struct scrub_ctx *sctx,
 	bio = btrfs_io_bio_alloc(1);
 	bio->bi_iter.bi_size = 0;
 	bio->bi_iter.bi_sector = physical_for_dev_replace >> 9;
-	bio->bi_bdev = dev->bdev;
+	bio_set_dev(bio, dev->bdev);
 	bio->bi_opf = REQ_OP_WRITE | REQ_SYNC;
 	ret = bio_add_page(bio, page, PAGE_SIZE, 0);
 	if (ret != PAGE_SIZE) {
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e8b9a269fdde..f9f0f474a64f 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6188,7 +6188,7 @@ static void submit_stripe_bio(struct btrfs_bio *bbio, struct bio *bio,
 		rcu_read_unlock();
 	}
 #endif
-	bio->bi_bdev = dev->bdev;
+	bio_set_dev(bio, dev->bdev);
 
 	btrfs_bio_counter_inc_noblocked(fs_info);
 
diff --git a/fs/buffer.c b/fs/buffer.c
index 5715dac7821f..50e51a67dc78 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3057,7 +3057,7 @@ void guard_bio_eod(int op, struct bio *bio)
 	struct bio_vec *bvec = &bio->bi_io_vec[bio->bi_vcnt - 1];
 	unsigned truncated_bytes;
 
-	maxsector = i_size_read(bio->bi_bdev->bd_inode) >> 9;
+	maxsector = get_capacity(bio->bi_disk);
 	if (!maxsector)
 		return;
 
@@ -3116,7 +3116,7 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
 	}
 
 	bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
-	bio->bi_bdev = bh->b_bdev;
+	bio_set_dev(bio, bh->b_bdev);
 	bio->bi_write_hint = write_hint;
 
 	bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh));
diff --git a/fs/crypto/bio.c b/fs/crypto/bio.c
index 6181e9526860..483784d5eb73 100644
--- a/fs/crypto/bio.c
+++ b/fs/crypto/bio.c
@@ -115,7 +115,7 @@ int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
 			err = -ENOMEM;
 			goto errout;
 		}
-		bio->bi_bdev = inode->i_sb->s_bdev;
+		bio_set_dev(bio, inode->i_sb->s_bdev);
 		bio->bi_iter.bi_sector =
 			pblk << (inode->i_sb->s_blocksize_bits - 9);
 		bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 08cf27811e5a..5fa2211e49ae 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -111,7 +111,7 @@ struct dio {
 	int op;
 	int op_flags;
 	blk_qc_t bio_cookie;
-	struct block_device *bio_bdev;
+	struct gendisk *bio_disk;
 	struct inode *inode;
 	loff_t i_size;			/* i_size when submitted */
 	dio_iodone_t *end_io;		/* IO completion function */
@@ -377,7 +377,7 @@ dio_bio_alloc(struct dio *dio, struct dio_submit *sdio,
 	 */
 	bio = bio_alloc(GFP_KERNEL, nr_vecs);
 
-	bio->bi_bdev = bdev;
+	bio_set_dev(bio, bdev);
 	bio->bi_iter.bi_sector = first_sector;
 	bio_set_op_attrs(bio, dio->op, dio->op_flags);
 	if (dio->is_async)
@@ -412,7 +412,7 @@ 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_bdev = bio->bi_bdev;
+	dio->bio_disk = bio->bi_disk;
 
 	if (sdio->submit_io) {
 		sdio->submit_io(bio, dio->inode, sdio->logical_offset_in_bio);
@@ -458,7 +458,7 @@ static struct bio *dio_await_one(struct dio *dio)
 		dio->waiter = current;
 		spin_unlock_irqrestore(&dio->bio_lock, flags);
 		if (!(dio->iocb->ki_flags & IOCB_HIPRI) ||
-		    !blk_mq_poll(bdev_get_queue(dio->bio_bdev), dio->bio_cookie))
+		    !blk_mq_poll(dio->bio_disk->queue, dio->bio_cookie))
 			io_schedule();
 		/* wake up sets us TASK_RUNNING */
 		spin_lock_irqsave(&dio->bio_lock, flags);
diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c
index 8bb72807e70d..3c6a9c156b7a 100644
--- a/fs/exofs/ore.c
+++ b/fs/exofs/ore.c
@@ -869,7 +869,7 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
 					goto out;
 				}
 
-				bio->bi_bdev = NULL;
+				bio->bi_disk = NULL;
 				bio->bi_next = NULL;
 				per_dev->offset = master_dev->offset;
 				per_dev->length = master_dev->length;
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index c2fce4478cca..55ad7dd149d0 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -300,7 +300,7 @@ static void ext4_end_bio(struct bio *bio)
 	char b[BDEVNAME_SIZE];
 
 	if (WARN_ONCE(!io_end, "io_end is NULL: %s: sector %Lu len %u err %d\n",
-		      bdevname(bio->bi_bdev, b),
+		      bio_devname(bio, b),
 		      (long long) bio->bi_iter.bi_sector,
 		      (unsigned) bio_sectors(bio),
 		      bio->bi_status)) {
@@ -375,7 +375,7 @@ static int io_submit_init_bio(struct ext4_io_submit *io,
 		return -ENOMEM;
 	wbc_init_bio(io->io_wbc, bio);
 	bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
-	bio->bi_bdev = bh->b_bdev;
+	bio_set_dev(bio, bh->b_bdev);
 	bio->bi_end_io = ext4_end_bio;
 	bio->bi_private = ext4_get_io_end(io->io_end);
 	io->io_bio = bio;
diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index 40a5497b0f60..04c90643af7a 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -254,7 +254,7 @@ int ext4_mpage_readpages(struct address_space *mapping,
 					fscrypt_release_ctx(ctx);
 				goto set_error_page;
 			}
-			bio->bi_bdev = bdev;
+			bio_set_dev(bio, bdev);
 			bio->bi_iter.bi_sector = blocks[0] << (blkbits - 9);
 			bio->bi_end_io = mpage_end_io;
 			bio->bi_private = ctx;
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 87c1f4150c64..a791aac4c5af 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -142,7 +142,7 @@ struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
 		}
 	}
 	if (bio) {
-		bio->bi_bdev = bdev;
+		bio_set_dev(bio, bdev);
 		bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
 	}
 	return bdev;
@@ -161,7 +161,8 @@ int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
 static bool __same_bdev(struct f2fs_sb_info *sbi,
 				block_t blk_addr, struct bio *bio)
 {
-	return f2fs_target_device(sbi, blk_addr, NULL) == bio->bi_bdev;
+	struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
+	return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
 }
 
 /*
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index f964b68718c1..6f8fc4a6e701 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -447,7 +447,7 @@ static int __submit_flush_wait(struct f2fs_sb_info *sbi,
 	int ret;
 
 	bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH;
-	bio->bi_bdev = bdev;
+	bio_set_dev(bio, bdev);
 	ret = submit_bio_wait(bio);
 	bio_put(bio);
 
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 3010f9edd177..720c19ada0f9 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -265,7 +265,7 @@ static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno)
 
 	bio = bio_alloc(GFP_NOIO, BIO_MAX_PAGES);
 	bio->bi_iter.bi_sector = blkno * (sb->s_blocksize >> 9);
-	bio->bi_bdev = sb->s_bdev;
+	bio_set_dev(bio, sb->s_bdev);
 	bio->bi_end_io = gfs2_end_log_write;
 	bio->bi_private = sdp;
 
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index fabe1614f879..39433a173baa 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -221,7 +221,7 @@ static void gfs2_submit_bhs(int op, int op_flags, struct buffer_head *bhs[],
 
 		bio = bio_alloc(GFP_NOIO, num);
 		bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
-		bio->bi_bdev = bh->b_bdev;
+		bio_set_dev(bio, bh->b_bdev);
 		while (num > 0) {
 			bh = *bhs;
 			if (!bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh))) {
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index e76058d34b74..8155e16076e1 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -242,7 +242,7 @@ static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent)
 
 	bio = bio_alloc(GFP_NOFS, 1);
 	bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9);
-	bio->bi_bdev = sb->s_bdev;
+	bio_set_dev(bio, sb->s_bdev);
 	bio_add_page(bio, page, PAGE_SIZE, 0);
 
 	bio->bi_end_io = end_bio_io_page;
diff --git a/fs/hfsplus/wrapper.c b/fs/hfsplus/wrapper.c
index e254fa0f0697..10032b919a85 100644
--- a/fs/hfsplus/wrapper.c
+++ b/fs/hfsplus/wrapper.c
@@ -65,7 +65,7 @@ int hfsplus_submit_bio(struct super_block *sb, sector_t sector,
 
 	bio = bio_alloc(GFP_NOIO, 1);
 	bio->bi_iter.bi_sector = sector;
-	bio->bi_bdev = sb->s_bdev;
+	bio_set_dev(bio, sb->s_bdev);
 	bio_set_op_attrs(bio, op, op_flags);
 
 	if (op != WRITE && data)
diff --git a/fs/iomap.c b/fs/iomap.c
index 039266128b7f..77be8850997b 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -805,7 +805,7 @@ iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos,
 	struct bio *bio;
 
 	bio = bio_alloc(GFP_KERNEL, 1);
-	bio->bi_bdev = iomap->bdev;
+	bio_set_dev(bio, iomap->bdev);
 	bio->bi_iter.bi_sector =
 		iomap->blkno + ((pos - iomap->offset) >> 9);
 	bio->bi_private = dio;
@@ -884,7 +884,7 @@ iomap_dio_actor(struct inode *inode, loff_t pos, loff_t length,
 			return 0;
 
 		bio = bio_alloc(GFP_KERNEL, nr_pages);
-		bio->bi_bdev = iomap->bdev;
+		bio_set_dev(bio, iomap->bdev);
 		bio->bi_iter.bi_sector =
 			iomap->blkno + ((pos - iomap->offset) >> 9);
 		bio->bi_write_hint = dio->iocb->ki_hint;
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index a21f0e9eecd4..0e5d412c0b01 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -1995,7 +1995,7 @@ static int lbmRead(struct jfs_log * log, int pn, struct lbuf ** bpp)
 	bio = bio_alloc(GFP_NOFS, 1);
 
 	bio->bi_iter.bi_sector = bp->l_blkno << (log->l2bsize - 9);
-	bio->bi_bdev = log->bdev;
+	bio_set_dev(bio, log->bdev);
 
 	bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
 	BUG_ON(bio->bi_iter.bi_size != LOGPSIZE);
@@ -2139,7 +2139,7 @@ static void lbmStartIO(struct lbuf * bp)
 
 	bio = bio_alloc(GFP_NOFS, 1);
 	bio->bi_iter.bi_sector = bp->l_blkno << (log->l2bsize - 9);
-	bio->bi_bdev = log->bdev;
+	bio_set_dev(bio, log->bdev);
 
 	bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
 	BUG_ON(bio->bi_iter.bi_size != LOGPSIZE);
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 65120a471729..1c4b9ad4d7ab 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -430,7 +430,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
 		len = min(xlen, (int)JFS_SBI(inode->i_sb)->nbperpage);
 
 		bio = bio_alloc(GFP_NOFS, 1);
-		bio->bi_bdev = inode->i_sb->s_bdev;
+		bio_set_dev(bio, inode->i_sb->s_bdev);
 		bio->bi_iter.bi_sector = pblock << (inode->i_blkbits - 9);
 		bio->bi_end_io = metapage_write_end_io;
 		bio->bi_private = page;
@@ -510,7 +510,7 @@ static int metapage_readpage(struct file *fp, struct page *page)
 				submit_bio(bio);
 
 			bio = bio_alloc(GFP_NOFS, 1);
-			bio->bi_bdev = inode->i_sb->s_bdev;
+			bio_set_dev(bio, inode->i_sb->s_bdev);
 			bio->bi_iter.bi_sector =
 				pblock << (inode->i_blkbits - 9);
 			bio->bi_end_io = metapage_read_end_io;
diff --git a/fs/mpage.c b/fs/mpage.c
index 2e4c41ccb5c9..37bb77c1302c 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -83,7 +83,7 @@ mpage_alloc(struct block_device *bdev,
 	}
 
 	if (bio) {
-		bio->bi_bdev = bdev;
+		bio_set_dev(bio, bdev);
 		bio->bi_iter.bi_sector = first_sector;
 	}
 	return bio;
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index d8863a804b15..995d707537da 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -130,7 +130,7 @@ bl_alloc_init_bio(int npg, struct block_device *bdev, sector_t disk_sector,
 
 	if (bio) {
 		bio->bi_iter.bi_sector = disk_sector;
-		bio->bi_bdev = bdev;
+		bio_set_dev(bio, bdev);
 		bio->bi_end_io = end_io;
 		bio->bi_private = par;
 	}
diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c
index e73c86d9855c..6c5009cc4e6f 100644
--- a/fs/nilfs2/segbuf.c
+++ b/fs/nilfs2/segbuf.c
@@ -400,7 +400,7 @@ static struct bio *nilfs_alloc_seg_bio(struct the_nilfs *nilfs, sector_t start,
 			bio = bio_alloc(GFP_NOIO, nr_vecs);
 	}
 	if (likely(bio)) {
-		bio->bi_bdev = nilfs->ns_bdev;
+		bio_set_dev(bio, nilfs->ns_bdev);
 		bio->bi_iter.bi_sector =
 			start << (nilfs->ns_blocksize_bits - 9);
 	}
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index ffe003982d95..6aea15746a56 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -554,7 +554,7 @@ static struct bio *o2hb_setup_one_bio(struct o2hb_region *reg,
 
 	/* Must put everything in 512 byte sectors for the bio... */
 	bio->bi_iter.bi_sector = (reg->hr_start_block + cs) << (bits - 9);
-	bio->bi_bdev = reg->hr_bdev;
+	bio_set_dev(bio, reg->hr_bdev);
 	bio->bi_private = wc;
 	bio->bi_end_io = o2hb_bio_end_io;
 	bio_set_op_attrs(bio, op, op_flags);
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 6bf120bb1a17..c8ca03a5a08f 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -517,7 +517,7 @@ xfs_init_bio_from_bh(
 	struct buffer_head	*bh)
 {
 	bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
-	bio->bi_bdev = bh->b_bdev;
+	bio_set_dev(bio, bh->b_bdev);
 }
 
 static struct xfs_ioend *
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 72f038492ba8..b1c9711e79a4 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1281,7 +1281,7 @@ xfs_buf_ioapply_map(
 	nr_pages = min(total_nr_pages, BIO_MAX_PAGES);
 
 	bio = bio_alloc(GFP_NOIO, nr_pages);
-	bio->bi_bdev = bp->b_target->bt_bdev;
+	bio_set_dev(bio, bp->b_target->bt_bdev);
 	bio->bi_iter.bi_sector = sector;
 	bio->bi_end_io = xfs_buf_bio_end_io;
 	bio->bi_private = bp;
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 9276788a9b24..a8fe7935332f 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -494,6 +494,24 @@ extern struct bio_vec *bvec_alloc(gfp_t, int, unsigned long *, mempool_t *);
 extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int);
 extern unsigned int bvec_nr_vecs(unsigned short idx);
 
+#define bio_set_dev(bio, bdev) 			\
+do {						\
+	(bio)->bi_disk = (bdev)->bd_disk;	\
+	(bio)->bi_partno = (bdev)->bd_partno;	\
+} while (0)
+
+#define bio_copy_dev(dst, src)			\
+do {						\
+	(dst)->bi_disk = (src)->bi_disk;	\
+	(dst)->bi_partno = (src)->bi_partno;	\
+} while (0)
+
+#define bio_dev(bio) \
+	disk_devt((bio)->bi_disk)
+
+#define bio_devname(bio, buf) \
+	__bdevname(bio_dev(bio), (buf))
+
 #ifdef CONFIG_BLK_CGROUP
 int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css);
 int bio_associate_current(struct bio *bio);
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index d2eb87c84d82..a2d2aa709cef 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -48,7 +48,8 @@ struct blk_issue_stat {
  */
 struct bio {
 	struct bio		*bi_next;	/* request queue link */
-	struct block_device	*bi_bdev;
+	struct gendisk		*bi_disk;
+	u8			bi_partno;
 	blk_status_t		bi_status;
 	unsigned int		bi_opf;		/* bottom bits req flags,
 						 * top bits REQ_OP. Use
diff --git a/include/trace/events/bcache.h b/include/trace/events/bcache.h
index df3e9ae5ad8d..daf749138ff8 100644
--- a/include/trace/events/bcache.h
+++ b/include/trace/events/bcache.h
@@ -21,7 +21,7 @@ DECLARE_EVENT_CLASS(bcache_request,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev->bd_dev;
+		__entry->dev		= bio_dev(bio);
 		__entry->orig_major	= d->disk->major;
 		__entry->orig_minor	= d->disk->first_minor;
 		__entry->sector		= bio->bi_iter.bi_sector;
@@ -98,7 +98,7 @@ DECLARE_EVENT_CLASS(bcache_bio,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev->bd_dev;
+		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio->bi_iter.bi_size >> 9;
 		blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -133,7 +133,7 @@ TRACE_EVENT(bcache_read,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev->bd_dev;
+		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio->bi_iter.bi_size >> 9;
 		blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index d0dbe60d8a6d..f815aaaef755 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -236,8 +236,7 @@ TRACE_EVENT(block_bio_bounce,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev ?
-					  bio->bi_bdev->bd_dev : 0;
+		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio_sectors(bio);
 		blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -274,7 +273,7 @@ TRACE_EVENT(block_bio_complete,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev->bd_dev;
+		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio_sectors(bio);
 		__entry->error		= error;
@@ -302,7 +301,7 @@ DECLARE_EVENT_CLASS(block_bio_merge,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev->bd_dev;
+		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio_sectors(bio);
 		blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -369,7 +368,7 @@ TRACE_EVENT(block_bio_queue,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev->bd_dev;
+		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio_sectors(bio);
 		blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -397,7 +396,8 @@ DECLARE_EVENT_CLASS(block_get_rq,
         ),
 
 	TP_fast_assign(
-		__entry->dev		= bio ? bio->bi_bdev->bd_dev : 0;
+		__entry->dev		= bio ? bio_dev(bio) : 0;
+		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio ? bio->bi_iter.bi_sector : 0;
 		__entry->nr_sector	= bio ? bio_sectors(bio) : 0;
 		blk_fill_rwbs(__entry->rwbs,
@@ -532,7 +532,7 @@ TRACE_EVENT(block_split,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev->bd_dev;
+		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->new_sector	= new_sector;
 		blk_fill_rwbs(__entry->rwbs, bio->bi_opf, bio->bi_iter.bi_size);
@@ -573,7 +573,7 @@ TRACE_EVENT(block_bio_remap,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= bio->bi_bdev->bd_dev;
+		__entry->dev		= bio_dev(bio);
 		__entry->sector		= bio->bi_iter.bi_sector;
 		__entry->nr_sector	= bio_sectors(bio);
 		__entry->old_dev	= dev;
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 6f77a2755abb..bc4dd7837e4c 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -829,7 +829,7 @@ DECLARE_EVENT_CLASS(f2fs__bio,
 
 	TP_fast_assign(
 		__entry->dev		= sb->s_dev;
-		__entry->target		= bio->bi_bdev->bd_dev;
+		__entry->target		= bio_dev(bio);
 		__entry->op		= bio_op(bio);
 		__entry->op_flags	= bio->bi_opf;
 		__entry->type		= type;
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 57d22571f306..d7cdc426ee38 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -242,8 +242,7 @@ static void hib_end_io(struct bio *bio)
 
 	if (bio->bi_status) {
 		printk(KERN_ALERT "Read-error on swap-device (%u:%u:%Lu)\n",
-				imajor(bio->bi_bdev->bd_inode),
-				iminor(bio->bi_bdev->bd_inode),
+				MAJOR(bio_dev(bio)), MINOR(bio_dev(bio)),
 				(unsigned long long)bio->bi_iter.bi_sector);
 	}
 
@@ -270,7 +269,7 @@ static int hib_submit_io(int op, int op_flags, pgoff_t page_off, void *addr,
 
 	bio = bio_alloc(__GFP_RECLAIM | __GFP_HIGH, 1);
 	bio->bi_iter.bi_sector = page_off * (PAGE_SIZE >> 9);
-	bio->bi_bdev = hib_resume_bdev;
+	bio_set_dev(bio, hib_resume_bdev);
 	bio_set_op_attrs(bio, op, op_flags);
 
 	if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 7724de18d2fe..2a685b45b73b 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -963,7 +963,7 @@ static void blk_add_trace_bio_remap(void *ignore,
 		return;
 
 	r.device_from = cpu_to_be32(dev);
-	r.device_to   = cpu_to_be32(bio->bi_bdev->bd_dev);
+	r.device_to   = cpu_to_be32(bio_dev(bio));
 	r.sector_from = cpu_to_be64(from);
 
 	__blk_add_trace(bt, bio->bi_iter.bi_sector, bio->bi_iter.bi_size,
diff --git a/mm/page_io.c b/mm/page_io.c
index b6c4ac388209..9cf1bc751d79 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -31,7 +31,10 @@ static struct bio *get_swap_bio(gfp_t gfp_flags,
 
 	bio = bio_alloc(gfp_flags, 1);
 	if (bio) {
-		bio->bi_iter.bi_sector = map_swap_page(page, &bio->bi_bdev);
+		struct block_device *bdev;
+
+		bio->bi_iter.bi_sector = map_swap_page(page, &bdev);
+		bio_set_dev(bio, bdev);
 		bio->bi_iter.bi_sector <<= PAGE_SHIFT - 9;
 		bio->bi_end_io = end_io;
 
@@ -57,8 +60,7 @@ void end_swap_bio_write(struct bio *bio)
 		 */
 		set_page_dirty(page);
 		pr_alert("Write-error on swap-device (%u:%u:%llu)\n",
-			 imajor(bio->bi_bdev->bd_inode),
-			 iminor(bio->bi_bdev->bd_inode),
+			 MAJOR(bio_dev(bio)), MINOR(bio_dev(bio)),
 			 (unsigned long long)bio->bi_iter.bi_sector);
 		ClearPageReclaim(page);
 	}
@@ -123,8 +125,7 @@ static void end_swap_bio_read(struct bio *bio)
 		SetPageError(page);
 		ClearPageUptodate(page);
 		pr_alert("Read-error on swap-device (%u:%u:%llu)\n",
-			 imajor(bio->bi_bdev->bd_inode),
-			 iminor(bio->bi_bdev->bd_inode),
+			 MAJOR(bio_dev(bio)), MINOR(bio_dev(bio)),
 			 (unsigned long long)bio->bi_iter.bi_sector);
 		goto out;
 	}
@@ -338,7 +339,7 @@ int swap_readpage(struct page *page, bool do_poll)
 	int ret = 0;
 	struct swap_info_struct *sis = page_swap_info(page);
 	blk_qc_t qc;
-	struct block_device *bdev;
+	struct gendisk *disk;
 
 	VM_BUG_ON_PAGE(!PageSwapCache(page), page);
 	VM_BUG_ON_PAGE(!PageLocked(page), page);
@@ -377,7 +378,7 @@ int swap_readpage(struct page *page, bool do_poll)
 		ret = -ENOMEM;
 		goto out;
 	}
-	bdev = bio->bi_bdev;
+	disk = bio->bi_disk;
 	bio->bi_private = current;
 	bio_set_op_attrs(bio, REQ_OP_READ, 0);
 	count_vm_event(PSWPIN);
@@ -388,7 +389,7 @@ int swap_readpage(struct page *page, bool do_poll)
 		if (!READ_ONCE(bio->bi_private))
 			break;
 
-		if (!blk_mq_poll(bdev_get_queue(bdev), qc))
+		if (!blk_mq_poll(disk->queue, qc))
 			break;
 	}
 	__set_current_state(TASK_RUNNING);
-- 
2.11.0

Re: don't require a struct block_device to submit a bio

[Christoph Hellwig]

Patch 6 didn't seem to make it through to the list, so here is a
link to the git tree:

http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/bi_bdev

Re: don't require a struct block_device to submit a bio

[Jens Axboe]

On 08/23/2017 11:10 AM, Christoph Hellwig wrote:
> Hi Jens,
> 
> this series removes the need to have a struct block_device ready to
> submit a bio.   We basically don't use it anywhere in the block stack
> anyway - we always go for the gendisk or request_queue.  The only
> exception is partition remapping for which we'll now need an additional
> partition index.  This helps with cases where we submit I/O from a
> character device (nvme or lightnvm passthrough) or a different block
> device (upcoming nvme multipath support).

Looks fine to me. I can take it through the block tree, when the md/btrfs
parts are reviewed by the right parties.

-- 
Jens Axboe

Re: don't require a struct block_device to submit a bio

[Jens Axboe]

On 08/23/2017 11:10 AM, Christoph Hellwig wrote:
> Hi Jens,
> 
> this series removes the need to have a struct block_device ready to
> submit a bio.   We basically don't use it anywhere in the block stack
> anyway - we always go for the gendisk or request_queue.  The only
> exception is partition remapping for which we'll now need an additional
> partition index.  This helps with cases where we submit I/O from a
> character device (nvme or lightnvm passthrough) or a different block
> device (upcoming nvme multipath support).

Added for 4.14, thanks.

-- 
Jens Axboe