Merge tag 'for-5.19/block-2022-05-22' of git://git.kernel.dk/linux-block

Pull block updates from Jens Axboe:
 "Here are the core block changes for 5.19. This contains:

   - blk-throttle accounting fix (Laibin)

   - Series removing redundant assignments (Michal)

   - Expose bio cache via the bio_set, so that DM can use it (Mike)

   - Finish off the bio allocation interface cleanups by dealing with
     the weirdest member of the family. bio_kmalloc combines a kmalloc
     for the bio and bio_vecs with a hidden bio_init call and magic
     cleanup semantics (Christoph)

   - Clean up the block layer API so that APIs consumed by file systems
     are (almost) only struct block_device based, so that file systems
     don't have to poke into block layer internals like the
     request_queue (Christoph)

   - Clean up the blk_execute_rq* API (Christoph)

   - Clean up various lose end in the blk-cgroup code to make it easier
     to follow in preparation of reworking the blkcg assignment for bios
     (Christoph)

   - Fix use-after-free issues in BFQ when processes with merged queues
     get moved to different cgroups (Jan)

   - BFQ fixes (Jan)

   - Various fixes and cleanups (Bart, Chengming, Fanjun, Julia, Ming,
     Wolfgang, me)"

* tag 'for-5.19/block-2022-05-22' of git://git.kernel.dk/linux-block: (83 commits)
  blk-mq: fix typo in comment
  bfq: Remove bfq_requeue_request_body()
  bfq: Remove superfluous conversion from RQ_BIC()
  bfq: Allow current waker to defend against a tentative one
  bfq: Relax waker detection for shared queues
  blk-cgroup: delete rcu_read_lock_held() WARN_ON_ONCE()
  blk-throttle: Set BIO_THROTTLED when bio has been throttled
  blk-cgroup: Remove unnecessary rcu_read_lock/unlock()
  blk-cgroup: always terminate io.stat lines
  block, bfq: make bfq_has_work() more accurate
  block, bfq: protect 'bfqd->queued' by 'bfqd->lock'
  block: cleanup the VM accounting in submit_bio
  block: Fix the bio.bi_opf comment
  block: reorder the REQ_ flags
  blk-iocost: combine local_stat and desc_stat to stat
  block: improve the error message from bio_check_eod
  block: allow passing a NULL bdev to bio_alloc_clone/bio_init_clone
  block: remove superfluous calls to blkcg_bio_issue_init
  kthread: unexport kthread_blkcg
  blk-cgroup: cleanup blkcg_maybe_throttle_current
  ...

50 files changed, 236 insertions, 399 deletions

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 4b0b25cc916e..912560f611c3 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -903,31 +903,6 @@ void drbd_gen_and_send_sync_uuid(struct drbd_peer_device *peer_device)
 	}
 }
 
-/* communicated if (agreed_features & DRBD_FF_WSAME) */
-static void
-assign_p_sizes_qlim(struct drbd_device *device, struct p_sizes *p,
-					struct request_queue *q)
-{
-	if (q) {
-		p->qlim->physical_block_size = cpu_to_be32(queue_physical_block_size(q));
-		p->qlim->logical_block_size = cpu_to_be32(queue_logical_block_size(q));
-		p->qlim->alignment_offset = cpu_to_be32(queue_alignment_offset(q));
-		p->qlim->io_min = cpu_to_be32(queue_io_min(q));
-		p->qlim->io_opt = cpu_to_be32(queue_io_opt(q));
-		p->qlim->discard_enabled = blk_queue_discard(q);
-		p->qlim->write_same_capable = 0;
-	} else {
-		q = device->rq_queue;
-		p->qlim->physical_block_size = cpu_to_be32(queue_physical_block_size(q));
-		p->qlim->logical_block_size = cpu_to_be32(queue_logical_block_size(q));
-		p->qlim->alignment_offset = 0;
-		p->qlim->io_min = cpu_to_be32(queue_io_min(q));
-		p->qlim->io_opt = cpu_to_be32(queue_io_opt(q));
-		p->qlim->discard_enabled = 0;
-		p->qlim->write_same_capable = 0;
-	}
-}
-
 int drbd_send_sizes(struct drbd_peer_device *peer_device, int trigger_reply, enum dds_flags flags)
 {
 	struct drbd_device *device = peer_device->device;
@@ -949,7 +924,9 @@ int drbd_send_sizes(struct drbd_peer_device *peer_device, int trigger_reply, enu
 
 	memset(p, 0, packet_size);
 	if (get_ldev_if_state(device, D_NEGOTIATING)) {
-		struct request_queue *q = bdev_get_queue(device->ldev->backing_bdev);
+		struct block_device *bdev = device->ldev->backing_bdev;
+		struct request_queue *q = bdev_get_queue(bdev);
+
 		d_size = drbd_get_max_capacity(device->ldev);
 		rcu_read_lock();
 		u_size = rcu_dereference(device->ldev->disk_conf)->disk_size;
@@ -957,14 +934,32 @@ int drbd_send_sizes(struct drbd_peer_device *peer_device, int trigger_reply, enu
 		q_order_type = drbd_queue_order_type(device);
 		max_bio_size = queue_max_hw_sectors(q) << 9;
 		max_bio_size = min(max_bio_size, DRBD_MAX_BIO_SIZE);
-		assign_p_sizes_qlim(device, p, q);
+		p->qlim->physical_block_size =
+			cpu_to_be32(bdev_physical_block_size(bdev));
+		p->qlim->logical_block_size =
+			cpu_to_be32(bdev_logical_block_size(bdev));
+		p->qlim->alignment_offset =
+			cpu_to_be32(bdev_alignment_offset(bdev));
+		p->qlim->io_min = cpu_to_be32(bdev_io_min(bdev));
+		p->qlim->io_opt = cpu_to_be32(bdev_io_opt(bdev));
+		p->qlim->discard_enabled = !!bdev_max_discard_sectors(bdev);
 		put_ldev(device);
 	} else {
+		struct request_queue *q = device->rq_queue;
+
+		p->qlim->physical_block_size =
+			cpu_to_be32(queue_physical_block_size(q));
+		p->qlim->logical_block_size =
+			cpu_to_be32(queue_logical_block_size(q));
+		p->qlim->alignment_offset = 0;
+		p->qlim->io_min = cpu_to_be32(queue_io_min(q));
+		p->qlim->io_opt = cpu_to_be32(queue_io_opt(q));
+		p->qlim->discard_enabled = 0;
+
 		d_size = 0;
 		u_size = 0;
 		q_order_type = QUEUE_ORDERED_NONE;
 		max_bio_size = DRBD_MAX_BIO_SIZE; /* ... multiple BIOs per peer_request */
-		assign_p_sizes_qlim(device, p, NULL);
 	}
 
 	if (peer_device->connection->agreed_pro_version <= 94)
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index b7216c186ba4..a6280dcb3767 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1204,50 +1204,40 @@ static unsigned int drbd_max_discard_sectors(struct drbd_connection *connection)
 }
 
 static void decide_on_discard_support(struct drbd_device *device,
-			struct request_queue *q,
-			struct request_queue *b,
-			bool discard_zeroes_if_aligned)
+		struct drbd_backing_dev *bdev)
 {
-	/* q = drbd device queue (device->rq_queue)
-	 * b = backing device queue (device->ldev->backing_bdev->bd_disk->queue),
-	 *     or NULL if diskless
-	 */
-	struct drbd_connection *connection = first_peer_device(device)->connection;
-	bool can_do = b ? blk_queue_discard(b) : true;
-
-	if (can_do && connection->cstate >= C_CONNECTED && !(connection->agreed_features & DRBD_FF_TRIM)) {
-		can_do = false;
-		drbd_info(connection, "peer DRBD too old, does not support TRIM: disabling discards\n");
-	}
-	if (can_do) {
-		/* We don't care for the granularity, really.
-		 * Stacking limits below should fix it for the local
-		 * device.  Whether or not it is a suitable granularity
-		 * on the remote device is not our problem, really. If
-		 * you care, you need to use devices with similar
-		 * topology on all peers. */
-		blk_queue_discard_granularity(q, 512);
-		q->limits.max_discard_sectors = drbd_max_discard_sectors(connection);
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
-		q->limits.max_write_zeroes_sectors = drbd_max_discard_sectors(connection);
-	} else {
-		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
-		blk_queue_discard_granularity(q, 0);
-		q->limits.max_discard_sectors = 0;
-		q->limits.max_write_zeroes_sectors = 0;
-	}
-}
+	struct drbd_connection *connection =
+		first_peer_device(device)->connection;
+	struct request_queue *q = device->rq_queue;
 
-static void fixup_discard_if_not_supported(struct request_queue *q)
-{
-	/* To avoid confusion, if this queue does not support discard, clear
-	 * max_discard_sectors, which is what lsblk -D reports to the user.
-	 * Older kernels got this wrong in "stack limits".
-	 * */
-	if (!blk_queue_discard(q)) {
-		blk_queue_max_discard_sectors(q, 0);
-		blk_queue_discard_granularity(q, 0);
+	if (bdev && !bdev_max_discard_sectors(bdev->backing_bdev))
+		goto not_supported;
+
+	if (connection->cstate >= C_CONNECTED &&
+	    !(connection->agreed_features & DRBD_FF_TRIM)) {
+		drbd_info(connection,
+			"peer DRBD too old, does not support TRIM: disabling discards\n");
+		goto not_supported;
 	}
+
+	/*
+	 * We don't care for the granularity, really.
+	 *
+	 * Stacking limits below should fix it for the local device.  Whether or
+	 * not it is a suitable granularity on the remote device is not our
+	 * problem, really. If you care, you need to use devices with similar
+	 * topology on all peers.
+	 */
+	blk_queue_discard_granularity(q, 512);
+	q->limits.max_discard_sectors = drbd_max_discard_sectors(connection);
+	q->limits.max_write_zeroes_sectors =
+		drbd_max_discard_sectors(connection);
+	return;
+
+not_supported:
+	blk_queue_discard_granularity(q, 0);
+	q->limits.max_discard_sectors = 0;
+	q->limits.max_write_zeroes_sectors = 0;
 }
 
 static void fixup_write_zeroes(struct drbd_device *device, struct request_queue *q)
@@ -1273,7 +1263,6 @@ static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backi
 	unsigned int max_segments = 0;
 	struct request_queue *b = NULL;
 	struct disk_conf *dc;
-	bool discard_zeroes_if_aligned = true;
 
 	if (bdev) {
 		b = bdev->backing_bdev->bd_disk->queue;
@@ -1282,7 +1271,6 @@ static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backi
 		rcu_read_lock();
 		dc = rcu_dereference(device->ldev->disk_conf);
 		max_segments = dc->max_bio_bvecs;
-		discard_zeroes_if_aligned = dc->discard_zeroes_if_aligned;
 		rcu_read_unlock();
 
 		blk_set_stacking_limits(&q->limits);
@@ -1292,13 +1280,12 @@ static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backi
 	/* This is the workaround for "bio would need to, but cannot, be split" */
 	blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
 	blk_queue_segment_boundary(q, PAGE_SIZE-1);
-	decide_on_discard_support(device, q, b, discard_zeroes_if_aligned);
+	decide_on_discard_support(device, bdev);
 
 	if (b) {
 		blk_stack_limits(&q->limits, &b->limits, 0);
 		disk_update_readahead(device->vdisk);
 	}
-	fixup_discard_if_not_supported(q);
 	fixup_write_zeroes(device, q);
 }
 
@@ -1437,14 +1424,14 @@ static bool write_ordering_changed(struct disk_conf *a, struct disk_conf *b)
 static void sanitize_disk_conf(struct drbd_device *device, struct disk_conf *disk_conf,
 			       struct drbd_backing_dev *nbc)
 {
-	struct request_queue * const q = nbc->backing_bdev->bd_disk->queue;
+	struct block_device *bdev = nbc->backing_bdev;
 
 	if (disk_conf->al_extents < DRBD_AL_EXTENTS_MIN)
 		disk_conf->al_extents = DRBD_AL_EXTENTS_MIN;
 	if (disk_conf->al_extents > drbd_al_extents_max(nbc))
 		disk_conf->al_extents = drbd_al_extents_max(nbc);
 
-	if (!blk_queue_discard(q)) {
+	if (!bdev_max_discard_sectors(bdev)) {
 		if (disk_conf->rs_discard_granularity) {
 			disk_conf->rs_discard_granularity = 0; /* disable feature */
 			drbd_info(device, "rs_discard_granularity feature disabled\n");
@@ -1453,16 +1440,19 @@ static void sanitize_disk_conf(struct drbd_device *device, struct disk_conf *dis
 
 	if (disk_conf->rs_discard_granularity) {
 		int orig_value = disk_conf->rs_discard_granularity;
+		sector_t discard_size = bdev_max_discard_sectors(bdev) << 9;
+		unsigned int discard_granularity = bdev_discard_granularity(bdev);
 		int remainder;
 
-		if (q->limits.discard_granularity > disk_conf->rs_discard_granularity)
-			disk_conf->rs_discard_granularity = q->limits.discard_granularity;
+		if (discard_granularity > disk_conf->rs_discard_granularity)
+			disk_conf->rs_discard_granularity = discard_granularity;
 
-		remainder = disk_conf->rs_discard_granularity % q->limits.discard_granularity;
+		remainder = disk_conf->rs_discard_granularity %
+				discard_granularity;
 		disk_conf->rs_discard_granularity += remainder;
 
-		if (disk_conf->rs_discard_granularity > q->limits.max_discard_sectors << 9)
-			disk_conf->rs_discard_granularity = q->limits.max_discard_sectors << 9;
+		if (disk_conf->rs_discard_granularity > discard_size)
+			disk_conf->rs_discard_granularity = discard_size;
 
 		if (disk_conf->rs_discard_granularity != orig_value)
 			drbd_info(device, "rs_discard_granularity changed to %d\n",
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 08da922f81d1..2957b0b68d60 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1511,7 +1511,6 @@ void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backin
 int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, unsigned int nr_sectors, int flags)
 {
 	struct block_device *bdev = device->ldev->backing_bdev;
-	struct request_queue *q = bdev_get_queue(bdev);
 	sector_t tmp, nr;
 	unsigned int max_discard_sectors, granularity;
 	int alignment;
@@ -1521,10 +1520,10 @@ int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, u
 		goto zero_out;
 
 	/* Zero-sector (unknown) and one-sector granularities are the same.  */
-	granularity = max(q->limits.discard_granularity >> 9, 1U);
+	granularity = max(bdev_discard_granularity(bdev) >> 9, 1U);
 	alignment = (bdev_discard_alignment(bdev) >> 9) % granularity;
 
-	max_discard_sectors = min(q->limits.max_discard_sectors, (1U << 22));
+	max_discard_sectors = min(bdev_max_discard_sectors(bdev), (1U << 22));
 	max_discard_sectors -= max_discard_sectors % granularity;
 	if (unlikely(!max_discard_sectors))
 		goto zero_out;
@@ -1548,7 +1547,8 @@ int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, u
 		start = tmp;
 	}
 	while (nr_sectors >= max_discard_sectors) {
-		err |= blkdev_issue_discard(bdev, start, max_discard_sectors, GFP_NOIO, 0);
+		err |= blkdev_issue_discard(bdev, start, max_discard_sectors,
+					    GFP_NOIO);
 		nr_sectors -= max_discard_sectors;
 		start += max_discard_sectors;
 	}
@@ -1560,7 +1560,7 @@ int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, u
 		nr = nr_sectors;
 		nr -= (unsigned int)nr % granularity;
 		if (nr) {
-			err |= blkdev_issue_discard(bdev, start, nr, GFP_NOIO, 0);
+			err |= blkdev_issue_discard(bdev, start, nr, GFP_NOIO);
 			nr_sectors -= nr;
 			start += nr;
 		}
@@ -1575,11 +1575,10 @@ int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, u
 
 static bool can_do_reliable_discards(struct drbd_device *device)
 {
-	struct request_queue *q = bdev_get_queue(device->ldev->backing_bdev);
 	struct disk_conf *dc;
 	bool can_do;
 
-	if (!blk_queue_discard(q))
+	if (!bdev_max_discard_sectors(device->ldev->backing_bdev))
 		return false;
 
 	rcu_read_lock();
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index a58595f5ee2c..fabcf647306a 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -314,15 +314,12 @@ static int lo_fallocate(struct loop_device *lo, struct request *rq, loff_t pos,
 
 	mode |= FALLOC_FL_KEEP_SIZE;
 
-	if (!blk_queue_discard(lo->lo_queue)) {
-		ret = -EOPNOTSUPP;
-		goto out;
-	}
+	if (!bdev_max_discard_sectors(lo->lo_device))
+		return -EOPNOTSUPP;
 
 	ret = file->f_op->fallocate(file, mode, pos, blk_rq_bytes(rq));
 	if (unlikely(ret && ret != -EINVAL && ret != -EOPNOTSUPP))
-		ret = -EIO;
- out:
+		return -EIO;
 	return ret;
 }
 
@@ -762,7 +759,7 @@ static void loop_config_discard(struct loop_device *lo)
 		struct request_queue *backingq = bdev_get_queue(I_BDEV(inode));
 
 		max_discard_sectors = backingq->limits.max_write_zeroes_sectors;
-		granularity = backingq->limits.discard_granularity ?:
+		granularity = bdev_discard_granularity(I_BDEV(inode)) ?:
 			queue_physical_block_size(backingq);
 
 	/*
@@ -787,12 +784,10 @@ static void loop_config_discard(struct loop_device *lo)
 		q->limits.discard_granularity = granularity;
 		blk_queue_max_discard_sectors(q, max_discard_sectors);
 		blk_queue_max_write_zeroes_sectors(q, max_discard_sectors);
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
 	} else {
 		q->limits.discard_granularity = 0;
 		blk_queue_max_discard_sectors(q, 0);
 		blk_queue_max_write_zeroes_sectors(q, 0);
-		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
 	}
 	q->limits.discard_alignment = 0;
 }
@@ -903,7 +898,7 @@ static void loop_update_rotational(struct loop_device *lo)
 
 	/* not all filesystems (e.g. tmpfs) have a sb->s_bdev */
 	if (file_bdev)
-		nonrot = blk_queue_nonrot(bdev_get_queue(file_bdev));
+		nonrot = bdev_nonrot(file_bdev);
 
 	if (nonrot)
 		blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
@@ -1834,12 +1829,14 @@ static blk_status_t loop_queue_rq(struct blk_mq_hw_ctx *hctx,
 	cmd->blkcg_css = NULL;
 	cmd->memcg_css = NULL;
 #ifdef CONFIG_BLK_CGROUP
-	if (rq->bio && rq->bio->bi_blkg) {
-		cmd->blkcg_css = &bio_blkcg(rq->bio)->css;
+	if (rq->bio) {
+		cmd->blkcg_css = bio_blkcg_css(rq->bio);
 #ifdef CONFIG_MEMCG
-		cmd->memcg_css =
-			cgroup_get_e_css(cmd->blkcg_css->cgroup,
-					&memory_cgrp_subsys);
+		if (cmd->blkcg_css) {
+			cmd->memcg_css =
+				cgroup_get_e_css(cmd->blkcg_css->cgroup,
+						&memory_cgrp_subsys);
+		}
 #endif
 	}
 #endif
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 5a1f98494ddd..4729aef8c646 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1231,8 +1231,6 @@ static void nbd_parse_flags(struct nbd_device *nbd)
 		set_disk_ro(nbd->disk, true);
 	else
 		set_disk_ro(nbd->disk, false);
-	if (config->flags & NBD_FLAG_SEND_TRIM)
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, nbd->disk->queue);
 	if (config->flags & NBD_FLAG_SEND_FLUSH) {
 		if (config->flags & NBD_FLAG_SEND_FUA)
 			blk_queue_write_cache(nbd->disk->queue, true, true);
@@ -1319,8 +1317,7 @@ static void nbd_config_put(struct nbd_device *nbd)
 		nbd->tag_set.timeout = 0;
 		nbd->disk->queue->limits.discard_granularity = 0;
 		nbd->disk->queue->limits.discard_alignment = 0;
-		blk_queue_max_discard_sectors(nbd->disk->queue, UINT_MAX);
-		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, nbd->disk->queue);
+		blk_queue_max_discard_sectors(nbd->disk->queue, 0);
 
 		mutex_unlock(&nbd->config_lock);
 		nbd_put(nbd);
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index c441a4972064..5cb4c92cdffe 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1767,7 +1767,6 @@ static void null_config_discard(struct nullb *nullb)
 	nullb->q->limits.discard_granularity = nullb->dev->blocksize;
 	nullb->q->limits.discard_alignment = nullb->dev->blocksize;
 	blk_queue_max_discard_sectors(nullb->q, UINT_MAX >> 9);
-	blk_queue_flag_set(QUEUE_FLAG_DISCARD, nullb->q);
 }
 
 static const struct block_device_operations null_bio_ops = {
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index a3a43ab8582d..789093375344 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -522,7 +522,7 @@ static struct packet_data *pkt_alloc_packet_data(int frames)
 		goto no_pkt;
 
 	pkt->frames = frames;
-	pkt->w_bio = bio_kmalloc(GFP_KERNEL, frames);
+	pkt->w_bio = bio_kmalloc(frames, GFP_KERNEL);
 	if (!pkt->w_bio)
 		goto no_bio;
 
@@ -536,27 +536,21 @@ static struct packet_data *pkt_alloc_packet_data(int frames)
 	bio_list_init(&pkt->orig_bios);
 
 	for (i = 0; i < frames; i++) {
-		struct bio *bio = bio_kmalloc(GFP_KERNEL, 1);
-		if (!bio)
+		pkt->r_bios[i] = bio_kmalloc(1, GFP_KERNEL);
+		if (!pkt->r_bios[i])
 			goto no_rd_bio;
-
-		pkt->r_bios[i] = bio;
 	}
 
 	return pkt;
 
 no_rd_bio:
-	for (i = 0; i < frames; i++) {
-		struct bio *bio = pkt->r_bios[i];
-		if (bio)
-			bio_put(bio);
-	}
-
+	for (i = 0; i < frames; i++)
+		kfree(pkt->r_bios[i]);
 no_page:
 	for (i = 0; i < frames / FRAMES_PER_PAGE; i++)
 		if (pkt->pages[i])
 			__free_page(pkt->pages[i]);
-	bio_put(pkt->w_bio);
+	kfree(pkt->w_bio);
 no_bio:
 	kfree(pkt);
 no_pkt:
@@ -570,14 +564,11 @@ static void pkt_free_packet_data(struct packet_data *pkt)
 {
 	int i;
 
-	for (i = 0; i < pkt->frames; i++) {
-		struct bio *bio = pkt->r_bios[i];
-		if (bio)
-			bio_put(bio);
-	}
+	for (i = 0; i < pkt->frames; i++)
+		kfree(pkt->r_bios[i]);
 	for (i = 0; i < pkt->frames / FRAMES_PER_PAGE; i++)
 		__free_page(pkt->pages[i]);
-	bio_put(pkt->w_bio);
+	kfree(pkt->w_bio);
 	kfree(pkt);
 }
 
@@ -951,6 +942,7 @@ static void pkt_end_io_read(struct bio *bio)
 
 	if (bio->bi_status)
 		atomic_inc(&pkt->io_errors);
+	bio_uninit(bio);
 	if (atomic_dec_and_test(&pkt->io_wait)) {
 		atomic_inc(&pkt->run_sm);
 		wake_up(&pd->wqueue);
@@ -968,6 +960,7 @@ static void pkt_end_io_packet_write(struct bio *bio)
 
 	pd->stats.pkt_ended++;
 
+	bio_uninit(bio);
 	pkt_bio_finished(pd);
 	atomic_dec(&pkt->io_wait);
 	atomic_inc(&pkt->run_sm);
@@ -1022,7 +1015,7 @@ static void pkt_gather_data(struct pktcdvd_device *pd, struct packet_data *pkt)
 			continue;
 
 		bio = pkt->r_bios[f];
-		bio_reset(bio, pd->bdev, REQ_OP_READ);
+		bio_init(bio, pd->bdev, bio->bi_inline_vecs, 1, REQ_OP_READ);
 		bio->bi_iter.bi_sector = pkt->sector + f * (CD_FRAMESIZE >> 9);
 		bio->bi_end_io = pkt_end_io_read;
 		bio->bi_private = pkt;
@@ -1235,7 +1228,8 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
 {
 	int f;
 
-	bio_reset(pkt->w_bio, pd->bdev, REQ_OP_WRITE);
+	bio_init(pkt->w_bio, pd->bdev, pkt->w_bio->bi_inline_vecs, pkt->frames,
+		 REQ_OP_WRITE);
 	pkt->w_bio->bi_iter.bi_sector = pkt->sector;
 	pkt->w_bio->bi_end_io = pkt_end_io_packet_write;
 	pkt->w_bio->bi_private = pkt;
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index b844432bad20..2b21f717cce1 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -4942,7 +4942,6 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
 	blk_queue_io_opt(q, rbd_dev->opts->alloc_size);
 
 	if (rbd_dev->opts->trim) {
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
 		q->limits.discard_granularity = rbd_dev->opts->alloc_size;
 		blk_queue_max_discard_sectors(q, objset_bytes >> SECTOR_SHIFT);
 		blk_queue_max_write_zeroes_sectors(q, objset_bytes >> SECTOR_SHIFT);
diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index b66e8840b94b..d178be175ad9 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -1364,11 +1364,9 @@ static void setup_request_queue(struct rnbd_clt_dev *dev)
 	blk_queue_max_discard_sectors(dev->queue, dev->max_discard_sectors);
 	dev->queue->limits.discard_granularity	= dev->discard_granularity;
 	dev->queue->limits.discard_alignment	= dev->discard_alignment;
-	if (dev->max_discard_sectors)
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, dev->queue);
 	if (dev->secure_discard)
-		blk_queue_flag_set(QUEUE_FLAG_SECERASE, dev->queue);
-
+		blk_queue_max_secure_erase_sectors(dev->queue,
+				dev->max_discard_sectors);
 	blk_queue_flag_set(QUEUE_FLAG_SAME_COMP, dev->queue);
 	blk_queue_flag_set(QUEUE_FLAG_SAME_FORCE, dev->queue);
 	blk_queue_max_segments(dev->queue, dev->max_segments);
diff --git a/drivers/block/rnbd/rnbd-srv-dev.h b/drivers/block/rnbd/rnbd-srv-dev.h
index 2c3df02b5e8e..d080a0de5922 100644
--- a/drivers/block/rnbd/rnbd-srv-dev.h
+++ b/drivers/block/rnbd/rnbd-srv-dev.h
@@ -44,16 +44,12 @@ static inline int rnbd_dev_get_max_hw_sects(const struct rnbd_dev *dev)
 
 static inline int rnbd_dev_get_secure_discard(const struct rnbd_dev *dev)
 {
-	return blk_queue_secure_erase(bdev_get_queue(dev->bdev));
+	return bdev_max_secure_erase_sectors(dev->bdev);
 }
 
 static inline int rnbd_dev_get_max_discard_sects(const struct rnbd_dev *dev)
 {
-	if (!blk_queue_discard(bdev_get_queue(dev->bdev)))
-		return 0;
-
-	return blk_queue_get_max_sectors(bdev_get_queue(dev->bdev),
-					 REQ_OP_DISCARD);
+	return bdev_max_discard_sectors(dev->bdev);
 }
 
 static inline int rnbd_dev_get_discard_granularity(const struct rnbd_dev *dev)
diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index f04df6294650..beaef43a67b9 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -533,7 +533,6 @@ static void rnbd_srv_fill_msg_open_rsp(struct rnbd_msg_open_rsp *rsp,
 					struct rnbd_srv_sess_dev *sess_dev)
 {
 	struct rnbd_dev *rnbd_dev = sess_dev->rnbd_dev;
-	struct request_queue *q = bdev_get_queue(rnbd_dev->bdev);
 
 	rsp->hdr.type = cpu_to_le16(RNBD_MSG_OPEN_RSP);
 	rsp->device_id =
@@ -558,9 +557,9 @@ static void rnbd_srv_fill_msg_open_rsp(struct rnbd_msg_open_rsp *rsp,
 	rsp->secure_discard =
 		cpu_to_le16(rnbd_dev_get_secure_discard(rnbd_dev));
 	rsp->cache_policy = 0;
-	if (test_bit(QUEUE_FLAG_WC, &q->queue_flags))
+	if (bdev_write_cache(rnbd_dev->bdev))
 		rsp->cache_policy |= RNBD_WRITEBACK;
-	if (blk_queue_fua(q))
+	if (bdev_fua(rnbd_dev->bdev))
 		rsp->cache_policy |= RNBD_FUA;
 }
 
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index a8bcf3f664af..6ccf15253dee 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -888,8 +888,6 @@ static int virtblk_probe(struct virtio_device *vdev)
 			v = sg_elems;
 		blk_queue_max_discard_segments(q,
 					       min(v, MAX_DISCARD_SEGMENTS));
-
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
 	}
 
 	if (virtio_has_feature(vdev, VIRTIO_BLK_F_WRITE_ZEROES)) {
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index de42458195bc..a97f2bf5b01b 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -970,7 +970,6 @@ static int dispatch_discard_io(struct xen_blkif_ring *ring,
 	int status = BLKIF_RSP_OKAY;
 	struct xen_blkif *blkif = ring->blkif;
 	struct block_device *bdev = blkif->vbd.bdev;
-	unsigned long secure;
 	struct phys_req preq;
 
 	xen_blkif_get(blkif);
@@ -987,13 +986,15 @@ static int dispatch_discard_io(struct xen_blkif_ring *ring,
 	}
 	ring->st_ds_req++;
 
-	secure = (blkif->vbd.discard_secure &&
-		 (req->u.discard.flag & BLKIF_DISCARD_SECURE)) ?
-		 BLKDEV_DISCARD_SECURE : 0;
+	if (blkif->vbd.discard_secure &&
+	    (req->u.discard.flag & BLKIF_DISCARD_SECURE))
+		err = blkdev_issue_secure_erase(bdev,
+				req->u.discard.sector_number,
+				req->u.discard.nr_sectors, GFP_KERNEL);
+	else
+		err = blkdev_issue_discard(bdev, req->u.discard.sector_number,
+				req->u.discard.nr_sectors, GFP_KERNEL);
 
-	err = blkdev_issue_discard(bdev, req->u.discard.sector_number,
-				   req->u.discard.nr_sectors,
-				   GFP_KERNEL, secure);
 fail_response:
 	if (err == -EOPNOTSUPP) {
 		pr_debug("discard op failed, not supported\n");
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index f09040435e2e..b21bffc9c50b 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -484,7 +484,6 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
 {
 	struct xen_vbd *vbd;
 	struct block_device *bdev;
-	struct request_queue *q;
 
 	vbd = &blkif->vbd;
 	vbd->handle   = handle;
@@ -516,11 +515,9 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
 	if (vbd->bdev->bd_disk->flags & GENHD_FL_REMOVABLE)
 		vbd->type |= VDISK_REMOVABLE;
 
-	q = bdev_get_queue(bdev);
-	if (q && test_bit(QUEUE_FLAG_WC, &q->queue_flags))
+	if (bdev_write_cache(bdev))
 		vbd->flush_support = true;
-
-	if (q && blk_queue_secure_erase(q))
+	if (bdev_max_secure_erase_sectors(bdev))
 		vbd->discard_secure = true;
 
 	vbd->feature_gnt_persistent = feature_persistent;
@@ -583,7 +580,7 @@ static void xen_blkbk_discard(struct xenbus_transaction xbt, struct backend_info
 	if (!xenbus_read_unsigned(dev->nodename, "discard-enable", 1))
 		return;
 
-	if (blk_queue_discard(q)) {
+	if (bdev_max_discard_sectors(bdev)) {
 		err = xenbus_printf(xbt, dev->nodename,
 			"discard-granularity", "%u",
 			q->limits.discard_granularity);
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 003056d4f7f5..0f3f5238f7bc 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -944,13 +944,13 @@ static void blkif_set_queue_limits(struct blkfront_info *info)
 	blk_queue_flag_set(QUEUE_FLAG_VIRT, rq);
 
 	if (info->feature_discard) {
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, rq);
 		blk_queue_max_discard_sectors(rq, get_capacity(gd));
 		rq->limits.discard_granularity = info->discard_granularity ?:
 						 info->physical_sector_size;
 		rq->limits.discard_alignment = info->discard_alignment;
 		if (info->feature_secdiscard)
-			blk_queue_flag_set(QUEUE_FLAG_SECERASE, rq);
+			blk_queue_max_secure_erase_sectors(rq,
+							   get_capacity(gd));
 	}
 
 	/* Hard sector size and max sectors impersonate the equiv. hardware. */
@@ -1606,8 +1606,8 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
 				blkif_req(req)->error = BLK_STS_NOTSUPP;
 				info->feature_discard = 0;
 				info->feature_secdiscard = 0;
-				blk_queue_flag_clear(QUEUE_FLAG_DISCARD, rq);
-				blk_queue_flag_clear(QUEUE_FLAG_SECERASE, rq);
+				blk_queue_max_discard_sectors(rq, 0);
+				blk_queue_max_secure_erase_sectors(rq, 0);
 			}
 			break;
 		case BLKIF_OP_FLUSH_DISKCACHE:
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index e9474b02012d..1b277308d3ec 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -1675,9 +1675,10 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector,
 	bv.bv_len = PAGE_SIZE;
 	bv.bv_offset = 0;
 
-	start_time = disk_start_io_acct(bdev->bd_disk, SECTORS_PER_PAGE, op);
+	start_time = bdev_start_io_acct(bdev->bd_disk->part0,
+			SECTORS_PER_PAGE, op, jiffies);
 	ret = zram_bvec_rw(zram, &bv, index, offset, op, NULL);
-	disk_end_io_acct(bdev->bd_disk, op, start_time);
+	bdev_end_io_acct(bdev->bd_disk->part0, op, start_time);
 out:
 	/*
 	 * If I/O fails, just return error(ie, non-zero) without
@@ -1952,7 +1953,6 @@ static int zram_add(void)
 	blk_queue_io_opt(zram->disk->queue, PAGE_SIZE);
 	zram->disk->queue->limits.discard_granularity = PAGE_SIZE;
 	blk_queue_max_discard_sectors(zram->disk->queue, UINT_MAX);
-	blk_queue_flag_set(QUEUE_FLAG_DISCARD, zram->disk->queue);
 
 	/*
 	 * zram_bio_discard() will clear all logical blocks if logical block
diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c
index 097577ae3c47..ce13c272c387 100644
--- a/drivers/md/bcache/alloc.c
+++ b/drivers/md/bcache/alloc.c
@@ -336,7 +336,7 @@ static int bch_allocator_thread(void *arg)
 				mutex_unlock(&ca->set->bucket_lock);
 				blkdev_issue_discard(ca->bdev,
 					bucket_to_sector(ca->set, bucket),
-					ca->sb.bucket_size, GFP_KERNEL, 0);
+					ca->sb.bucket_size, GFP_KERNEL);
 				mutex_lock(&ca->set->bucket_lock);
 			}
 
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 6230dfdd9286..7510d1c983a5 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -107,15 +107,16 @@ void bch_btree_verify(struct btree *b)
 
 void bch_data_verify(struct cached_dev *dc, struct bio *bio)
 {
+	unsigned int nr_segs = bio_segments(bio);
 	struct bio *check;
 	struct bio_vec bv, cbv;
 	struct bvec_iter iter, citer = { 0 };
 
-	check = bio_kmalloc(GFP_NOIO, bio_segments(bio));
+	check = bio_kmalloc(nr_segs, GFP_NOIO);
 	if (!check)
 		return;
-	bio_set_dev(check, bio->bi_bdev);
-	check->bi_opf = REQ_OP_READ;
+	bio_init(check, bio->bi_bdev, check->bi_inline_vecs, nr_segs,
+		 REQ_OP_READ);
 	check->bi_iter.bi_sector = bio->bi_iter.bi_sector;
 	check->bi_iter.bi_size = bio->bi_iter.bi_size;
 
@@ -146,7 +147,8 @@ void bch_data_verify(struct cached_dev *dc, struct bio *bio)
 
 	bio_free_pages(check);
 out_put:
-	bio_put(check);
+	bio_uninit(check);
+	kfree(check);
 }
 
 #endif
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 320fcdfef48e..9c5dde73da88 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -1005,7 +1005,7 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s)
 		bio_get(s->iop.bio);
 
 		if (bio_op(bio) == REQ_OP_DISCARD &&
-		    !blk_queue_discard(bdev_get_queue(dc->bdev)))
+		    !bdev_max_discard_sectors(dc->bdev))
 			goto insert_data;
 
 		/* I/O request sent to backing device */
@@ -1115,7 +1115,7 @@ static void detached_dev_do_request(struct bcache_device *d, struct bio *bio,
 	bio->bi_private = ddip;
 
 	if ((bio_op(bio) == REQ_OP_DISCARD) &&
-	    !blk_queue_discard(bdev_get_queue(dc->bdev)))
+	    !bdev_max_discard_sectors(dc->bdev))
 		bio->bi_end_io(bio);
 	else
 		submit_bio_noacct(bio);
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index bf3de149d3c9..2f49e31142f6 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -973,7 +973,6 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
 
 	blk_queue_flag_set(QUEUE_FLAG_NONROT, d->disk->queue);
 	blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, d->disk->queue);
-	blk_queue_flag_set(QUEUE_FLAG_DISCARD, d->disk->queue);
 
 	blk_queue_write_cache(q, true, true);
 
@@ -2350,7 +2349,7 @@ static int register_cache(struct cache_sb *sb, struct cache_sb_disk *sb_disk,
 	ca->bdev->bd_holder = ca;
 	ca->sb_disk = sb_disk;
 
-	if (blk_queue_discard(bdev_get_queue(bdev)))
+	if (bdev_max_discard_sectors((bdev)))
 		ca->discard = CACHE_DISCARD(&ca->sb);
 
 	ret = cache_alloc(ca);
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index d1029d71ff3b..c6f677059214 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -1151,7 +1151,7 @@ STORE(__bch_cache)
 	if (attr == &sysfs_discard) {
 		bool v = strtoul_or_return(buf);
 
-		if (blk_queue_discard(bdev_get_queue(ca->bdev)))
+		if (bdev_max_discard_sectors(ca->bdev))
 			ca->discard = v;
 
 		if (v != CACHE_DISCARD(&ca->sb)) {
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index e9cbc70d5a0e..5ffa1dcf84cf 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -611,7 +611,8 @@ static void bio_complete(struct bio *bio)
 {
 	struct dm_buffer *b = bio->bi_private;
 	blk_status_t status = bio->bi_status;
-	bio_put(bio);
+	bio_uninit(bio);
+	kfree(bio);
 	b->end_io(b, status);
 }
 
@@ -626,16 +627,14 @@ static void use_bio(struct dm_buffer *b, int rw, sector_t sector,
 	if (unlikely(b->c->sectors_per_block_bits < PAGE_SHIFT - SECTOR_SHIFT))
 		vec_size += 2;
 
-	bio = bio_kmalloc(GFP_NOWAIT | __GFP_NORETRY | __GFP_NOWARN, vec_size);
+	bio = bio_kmalloc(vec_size, GFP_NOWAIT | __GFP_NORETRY | __GFP_NOWARN);
 	if (!bio) {
 dmio:
 		use_dmio(b, rw, sector, n_sectors, offset);
 		return;
 	}
-
+	bio_init(bio, b->c->bdev, bio->bi_inline_vecs, vec_size, rw);
 	bio->bi_iter.bi_sector = sector;
-	bio_set_dev(bio, b->c->bdev);
-	bio_set_op_attrs(bio, rw, 0);
 	bio->bi_end_io = bio_complete;
 	bio->bi_private = b;
 
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 780a61bc6cc0..28c5de8eca4a 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -3329,13 +3329,6 @@ static int cache_iterate_devices(struct dm_target *ti,
 	return r;
 }
 
-static bool origin_dev_supports_discard(struct block_device *origin_bdev)
-{
-	struct request_queue *q = bdev_get_queue(origin_bdev);
-
-	return blk_queue_discard(q);
-}
-
 /*
  * If discard_passdown was enabled verify that the origin device
  * supports discards.  Disable discard_passdown if not.
@@ -3349,7 +3342,7 @@ static void disable_passdown_if_not_supported(struct cache *cache)
 	if (!cache->features.discard_passdown)
 		return;
 
-	if (!origin_dev_supports_discard(origin_bdev))
+	if (!bdev_max_discard_sectors(origin_bdev))
 		reason = "discard unsupported";
 
 	else if (origin_limits->max_discard_sectors < cache->sectors_per_block)
diff --git a/drivers/md/dm-clone-target.c b/drivers/md/dm-clone-target.c
index 128316a73d01..811b0a5379d0 100644
--- a/drivers/md/dm-clone-target.c
+++ b/drivers/md/dm-clone-target.c
@@ -2016,13 +2016,6 @@ static void clone_resume(struct dm_target *ti)
 	do_waker(&clone->waker.work);
 }
 
-static bool bdev_supports_discards(struct block_device *bdev)
-{
-	struct request_queue *q = bdev_get_queue(bdev);
-
-	return (q && blk_queue_discard(q));
-}
-
 /*
  * If discard_passdown was enabled verify that the destination device supports
  * discards. Disable discard_passdown if not.
@@ -2036,7 +2029,7 @@ static void disable_passdown_if_not_supported(struct clone *clone)
 	if (!test_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags))
 		return;
 
-	if (!bdev_supports_discards(dest_dev))
+	if (!bdev_max_discard_sectors(dest_dev))
 		reason = "discard unsupported";
 	else if (dest_limits->max_discard_sectors < clone->region_size)
 		reason = "max discard sectors smaller than a region";
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 5762366333a2..e4b95eaeec8c 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -311,7 +311,7 @@ static void do_region(int op, int op_flags, unsigned region,
 	 * Reject unsupported discard and write same requests.
 	 */
 	if (op == REQ_OP_DISCARD)
-		special_cmd_max_sectors = q->limits.max_discard_sectors;
+		special_cmd_max_sectors = bdev_max_discard_sectors(where->bdev);
 	else if (op == REQ_OP_WRITE_ZEROES)
 		special_cmd_max_sectors = q->limits.max_write_zeroes_sectors;
 	if ((op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES) &&
diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index c9d036d6bb2e..e194226c89e5 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -866,9 +866,8 @@ static int log_writes_message(struct dm_target *ti, unsigned argc, char **argv,
 static void log_writes_io_hints(struct dm_target *ti, struct queue_limits *limits)
 {
 	struct log_writes_c *lc = ti->private;
-	struct request_queue *q = bdev_get_queue(lc->dev->bdev);
 
-	if (!q || !blk_queue_discard(q)) {
+	if (!bdev_max_discard_sectors(lc->dev->bdev)) {
 		lc->device_supports_discard = false;
 		limits->discard_granularity = lc->sectorsize;
 		limits->max_discard_sectors = (UINT_MAX >> SECTOR_SHIFT);
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 2b26435a6946..9526ccbedafb 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -2963,13 +2963,8 @@ static void configure_discard_support(struct raid_set *rs)
 	raid456 = rs_is_raid456(rs);
 
 	for (i = 0; i < rs->raid_disks; i++) {
-		struct request_queue *q;
-
-		if (!rs->dev[i].rdev.bdev)
-			continue;
-
-		q = bdev_get_queue(rs->dev[i].rdev.bdev);
-		if (!q || !blk_queue_discard(q))
+		if (!rs->dev[i].rdev.bdev ||
+		    !bdev_max_discard_sectors(rs->dev[i].rdev.bdev))
 			return;
 
 		if (raid456) {
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 03541cfc2317..e7d42f6335a2 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1820,9 +1820,7 @@ static int device_dax_write_cache_enabled(struct dm_target *ti,
 static int device_is_rotational(struct dm_target *ti, struct dm_dev *dev,
 				sector_t start, sector_t len, void *data)
 {
-	struct request_queue *q = bdev_get_queue(dev->bdev);
-
-	return !blk_queue_nonrot(q);
+	return !bdev_nonrot(dev->bdev);
 }
 
 static int device_is_not_random(struct dm_target *ti, struct dm_dev *dev,
@@ -1890,9 +1888,7 @@ static bool dm_table_supports_nowait(struct dm_table *t)
 static int device_not_discard_capable(struct dm_target *ti, struct dm_dev *dev,
 				      sector_t start, sector_t len, void *data)
 {
-	struct request_queue *q = bdev_get_queue(dev->bdev);
-
-	return !blk_queue_discard(q);
+	return !bdev_max_discard_sectors(dev->bdev);
 }
 
 static bool dm_table_supports_discards(struct dm_table *t)
@@ -1924,9 +1920,7 @@ static int device_not_secure_erase_capable(struct dm_target *ti,
 					   struct dm_dev *dev, sector_t start,
 					   sector_t len, void *data)
 {
-	struct request_queue *q = bdev_get_queue(dev->bdev);
-
-	return !blk_queue_secure_erase(q);
+	return !bdev_max_secure_erase_sectors(dev->bdev);
 }
 
 static bool dm_table_supports_secure_erase(struct dm_table *t)
@@ -1952,9 +1946,7 @@ static int device_requires_stable_pages(struct dm_target *ti,
 					struct dm_dev *dev, sector_t start,
 					sector_t len, void *data)
 {
-	struct request_queue *q = bdev_get_queue(dev->bdev);
-
-	return blk_queue_stable_writes(q);
+	return bdev_stable_writes(dev->bdev);
 }
 
 int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
@@ -1974,18 +1966,15 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
 		blk_queue_flag_clear(QUEUE_FLAG_NOWAIT, q);
 
 	if (!dm_table_supports_discards(t)) {
-		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
-		/* Must also clear discard limits... */
 		q->limits.max_discard_sectors = 0;
 		q->limits.max_hw_discard_sectors = 0;
 		q->limits.discard_granularity = 0;
 		q->limits.discard_alignment = 0;
 		q->limits.discard_misaligned = 0;
-	} else
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
+	}
 
-	if (dm_table_supports_secure_erase(t))
-		blk_queue_flag_set(QUEUE_FLAG_SECERASE, q);
+	if (!dm_table_supports_secure_erase(t))
+		q->limits.max_secure_erase_sectors = 0;
 
 	if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_WC))) {
 		wc = true;
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 4d25d0e27031..84c083f76673 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -398,8 +398,8 @@ static int issue_discard(struct discard_op *op, dm_block_t data_b, dm_block_t da
 	sector_t s = block_to_sectors(tc->pool, data_b);
 	sector_t len = block_to_sectors(tc->pool, data_e - data_b);
 
-	return __blkdev_issue_discard(tc->pool_dev->bdev, s, len,
-				      GFP_NOWAIT, 0, &op->bio);
+	return __blkdev_issue_discard(tc->pool_dev->bdev, s, len, GFP_NOWAIT,
+				      &op->bio);
 }
 
 static void end_discard(struct discard_op *op, int r)
@@ -2802,13 +2802,6 @@ static void requeue_bios(struct pool *pool)
 /*----------------------------------------------------------------
  * Binding of control targets to a pool object
  *--------------------------------------------------------------*/
-static bool data_dev_supports_discard(struct pool_c *pt)
-{
-	struct request_queue *q = bdev_get_queue(pt->data_dev->bdev);
-
-	return blk_queue_discard(q);
-}
-
 static bool is_factor(sector_t block_size, uint32_t n)
 {
 	return !sector_div(block_size, n);
@@ -2828,7 +2821,7 @@ static void disable_passdown_if_not_supported(struct pool_c *pt)
 	if (!pt->adjusted_pf.discard_passdown)
 		return;
 
-	if (!data_dev_supports_discard(pt))
+	if (!bdev_max_discard_sectors(pt->data_dev->bdev))
 		reason = "discard unsupported";
 
 	else if (data_limits->max_discard_sectors < pool->sectors_per_block)
@@ -4057,8 +4050,6 @@ static void pool_io_hints(struct dm_target *ti, struct queue_limits *limits)
 		/*
 		 * Must explicitly disallow stacking discard limits otherwise the
 		 * block layer will stack them if pool's data device has support.
-		 * QUEUE_FLAG_DISCARD wouldn't be set but there is no way for the
-		 * user to see that, so make sure to set all discard limits to 0.
 		 */
 		limits->discard_granularity = 0;
 		return;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 82957bd460e8..39081338ca61 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -955,7 +955,6 @@ void disable_discard(struct mapped_device *md)
 
 	/* device doesn't really support DISCARD, disable it */
 	limits->max_discard_sectors = 0;
-	blk_queue_flag_clear(QUEUE_FLAG_DISCARD, md->queue);
 }
 
 void disable_write_zeroes(struct mapped_device *md)
@@ -982,7 +981,7 @@ static void clone_endio(struct bio *bio)
 
 	if (unlikely(error == BLK_STS_TARGET)) {
 		if (bio_op(bio) == REQ_OP_DISCARD &&
-		    !q->limits.max_discard_sectors)
+		    !bdev_max_discard_sectors(bio->bi_bdev))
 			disable_discard(md);
 		else if (bio_op(bio) == REQ_OP_WRITE_ZEROES &&
 			 !q->limits.max_write_zeroes_sectors)
diff --git a/drivers/md/md-linear.c b/drivers/md/md-linear.c
index 0f55b079371b..138a3b25c5c8 100644
--- a/drivers/md/md-linear.c
+++ b/drivers/md/md-linear.c
@@ -64,7 +64,6 @@ static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks)
 	struct linear_conf *conf;
 	struct md_rdev *rdev;
 	int i, cnt;
-	bool discard_supported = false;
 
 	conf = kzalloc(struct_size(conf, disks, raid_disks), GFP_KERNEL);
 	if (!conf)
@@ -96,9 +95,6 @@ static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks)
 
 		conf->array_sectors += rdev->sectors;
 		cnt++;
-
-		if (blk_queue_discard(bdev_get_queue(rdev->bdev)))
-			discard_supported = true;
 	}
 	if (cnt != raid_disks) {
 		pr_warn("md/linear:%s: not enough drives present. Aborting!\n",
@@ -106,11 +102,6 @@ static struct linear_conf *linear_conf(struct mddev *mddev, int raid_disks)
 		goto out;
 	}
 
-	if (!discard_supported)
-		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, mddev->queue);
-	else
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, mddev->queue);
-
 	/*
 	 * Here we calculate the device offsets.
 	 */
@@ -252,7 +243,7 @@ static bool linear_make_request(struct mddev *mddev, struct bio *bio)
 		start_sector + data_offset;
 
 	if (unlikely((bio_op(bio) == REQ_OP_DISCARD) &&
-		     !blk_queue_discard(bio->bi_bdev->bd_disk->queue))) {
+		     !bdev_max_discard_sectors(bio->bi_bdev))) {
 		/* Just ignore it */
 		bio_endio(bio);
 	} else {
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 309b3af906ad..2587f872c088 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5991,8 +5991,7 @@ int md_run(struct mddev *mddev)
 		bool nonrot = true;
 
 		rdev_for_each(rdev, mddev) {
-			if (rdev->raid_disk >= 0 &&
-			    !blk_queue_nonrot(bdev_get_queue(rdev->bdev))) {
+			if (rdev->raid_disk >= 0 && !bdev_nonrot(rdev->bdev)) {
 				nonrot = false;
 				break;
 			}
@@ -8585,7 +8584,7 @@ void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev,
 {
 	struct bio *discard_bio = NULL;
 
-	if (__blkdev_issue_discard(rdev->bdev, start, size, GFP_NOIO, 0,
+	if (__blkdev_issue_discard(rdev->bdev, start, size, GFP_NOIO,
 			&discard_bio) || !discard_bio)
 		return;
 
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index b21e101183f4..7231f5e1eaa7 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -399,7 +399,6 @@ static int raid0_run(struct mddev *mddev)
 	conf = mddev->private;
 	if (mddev->queue) {
 		struct md_rdev *rdev;
-		bool discard_supported = false;
 
 		blk_queue_max_hw_sectors(mddev->queue, mddev->chunk_sectors);
 		blk_queue_max_write_zeroes_sectors(mddev->queue, mddev->chunk_sectors);
@@ -412,13 +411,7 @@ static int raid0_run(struct mddev *mddev)
 		rdev_for_each(rdev, mddev) {
 			disk_stack_limits(mddev->gendisk, rdev->bdev,
 					  rdev->data_offset << 9);
-			if (blk_queue_discard(bdev_get_queue(rdev->bdev)))
-				discard_supported = true;
 		}
-		if (!discard_supported)
-			blk_queue_flag_clear(QUEUE_FLAG_DISCARD, mddev->queue);
-		else
-			blk_queue_flag_set(QUEUE_FLAG_DISCARD, mddev->queue);
 	}
 
 	/* calculate array device size */
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 99d5464a51f8..5aed2c8b746e 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -165,9 +165,10 @@ static void * r1buf_pool_alloc(gfp_t gfp_flags, void *data)
 	 * Allocate bios : 1 for reading, n-1 for writing
 	 */
 	for (j = pi->raid_disks ; j-- ; ) {
-		bio = bio_kmalloc(gfp_flags, RESYNC_PAGES);
+		bio = bio_kmalloc(RESYNC_PAGES, gfp_flags);
 		if (!bio)
 			goto out_free_bio;
+		bio_init(bio, NULL, bio->bi_inline_vecs, RESYNC_PAGES, 0);
 		r1_bio->bios[j] = bio;
 	}
 	/*
@@ -206,8 +207,10 @@ out_free_pages:
 		resync_free_pages(&rps[j]);
 
 out_free_bio:
-	while (++j < pi->raid_disks)
-		bio_put(r1_bio->bios[j]);
+	while (++j < pi->raid_disks) {
+		bio_uninit(r1_bio->bios[j]);
+		kfree(r1_bio->bios[j]);
+	}
 	kfree(rps);
 
 out_free_r1bio:
@@ -225,7 +228,8 @@ static void r1buf_pool_free(void *__r1_bio, void *data)
 	for (i = pi->raid_disks; i--; ) {
 		rp = get_resync_pages(r1bio->bios[i]);
 		resync_free_pages(rp);
-		bio_put(r1bio->bios[i]);
+		bio_uninit(r1bio->bios[i]);
+		kfree(r1bio->bios[i]);
 	}
 
 	/* resync pages array stored in the 1st bio's .bi_private */
@@ -704,7 +708,7 @@ static int read_balance(struct r1conf *conf, struct r1bio *r1_bio, int *max_sect
 			/* At least two disks to choose from so failfast is OK */
 			set_bit(R1BIO_FailFast, &r1_bio->state);
 
-		nonrot = blk_queue_nonrot(bdev_get_queue(rdev->bdev));
+		nonrot = bdev_nonrot(rdev->bdev);
 		has_nonrot_disk |= nonrot;
 		pending = atomic_read(&rdev->nr_pending);
 		dist = abs(this_sector - conf->mirrors[disk].head_position);
@@ -802,7 +806,7 @@ static void flush_bio_list(struct r1conf *conf, struct bio *bio)
 		if (test_bit(Faulty, &rdev->flags)) {
 			bio_io_error(bio);
 		} else if (unlikely((bio_op(bio) == REQ_OP_DISCARD) &&
-				    !blk_queue_discard(bio->bi_bdev->bd_disk->queue)))
+				    !bdev_max_discard_sectors(bio->bi_bdev)))
 			/* Just ignore it */
 			bio_endio(bio);
 		else
@@ -1826,8 +1830,6 @@ static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev)
 			break;
 		}
 	}
-	if (mddev->queue && blk_queue_discard(bdev_get_queue(rdev->bdev)))
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, mddev->queue);
 	print_conf(conf);
 	return err;
 }
@@ -3106,7 +3108,6 @@ static int raid1_run(struct mddev *mddev)
 	int i;
 	struct md_rdev *rdev;
 	int ret;
-	bool discard_supported = false;
 
 	if (mddev->level != 1) {
 		pr_warn("md/raid1:%s: raid level not set to mirroring (%d)\n",
@@ -3141,8 +3142,6 @@ static int raid1_run(struct mddev *mddev)
 			continue;
 		disk_stack_limits(mddev->gendisk, rdev->bdev,
 				  rdev->data_offset << 9);
-		if (blk_queue_discard(bdev_get_queue(rdev->bdev)))
-			discard_supported = true;
 	}
 
 	mddev->degraded = 0;
@@ -3179,15 +3178,6 @@ static int raid1_run(struct mddev *mddev)
 
 	md_set_array_sectors(mddev, raid1_size(mddev, 0, 0));
 
-	if (mddev->queue) {
-		if (discard_supported)
-			blk_queue_flag_set(QUEUE_FLAG_DISCARD,
-						mddev->queue);
-		else
-			blk_queue_flag_clear(QUEUE_FLAG_DISCARD,
-						  mddev->queue);
-	}
-
 	ret = md_integrity_register(mddev);
 	if (ret) {
 		md_unregister_thread(&mddev->thread);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index dfe7d62d3fbd..834eb3ba95a6 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -145,15 +145,17 @@ static void * r10buf_pool_alloc(gfp_t gfp_flags, void *data)
 	 * Allocate bios.
 	 */
 	for (j = nalloc ; j-- ; ) {
-		bio = bio_kmalloc(gfp_flags, RESYNC_PAGES);
+		bio = bio_kmalloc(RESYNC_PAGES, gfp_flags);
 		if (!bio)
 			goto out_free_bio;
+		bio_init(bio, NULL, bio->bi_inline_vecs, RESYNC_PAGES, 0);
 		r10_bio->devs[j].bio = bio;
 		if (!conf->have_replacement)
 			continue;
-		bio = bio_kmalloc(gfp_flags, RESYNC_PAGES);
+		bio = bio_kmalloc(RESYNC_PAGES, gfp_flags);
 		if (!bio)
 			goto out_free_bio;
+		bio_init(bio, NULL, bio->bi_inline_vecs, RESYNC_PAGES, 0);
 		r10_bio->devs[j].repl_bio = bio;
 	}
 	/*
@@ -197,9 +199,11 @@ out_free_pages:
 out_free_bio:
 	for ( ; j < nalloc; j++) {
 		if (r10_bio->devs[j].bio)
-			bio_put(r10_bio->devs[j].bio);
+			bio_uninit(r10_bio->devs[j].bio);
+		kfree(r10_bio->devs[j].bio);
 		if (r10_bio->devs[j].repl_bio)
-			bio_put(r10_bio->devs[j].repl_bio);
+			bio_uninit(r10_bio->devs[j].repl_bio);
+		kfree(r10_bio->devs[j].repl_bio);
 	}
 	kfree(rps);
 out_free_r10bio:
@@ -220,12 +224,15 @@ static void r10buf_pool_free(void *__r10_bio, void *data)
 		if (bio) {
 			rp = get_resync_pages(bio);
 			resync_free_pages(rp);
-			bio_put(bio);
+			bio_uninit(bio);
+			kfree(bio);
 		}
 
 		bio = r10bio->devs[j].repl_bio;
-		if (bio)
-			bio_put(bio);
+		if (bio) {
+			bio_uninit(bio);
+			kfree(bio);
+		}
 	}
 
 	/* resync pages array stored in the 1st bio's .bi_private */
@@ -796,7 +803,7 @@ static struct md_rdev *read_balance(struct r10conf *conf,
 		if (!do_balance)
 			break;
 
-		nonrot = blk_queue_nonrot(bdev_get_queue(rdev->bdev));
+		nonrot = bdev_nonrot(rdev->bdev);
 		has_nonrot_disk |= nonrot;
 		pending = atomic_read(&rdev->nr_pending);
 		if (min_pending > pending && nonrot) {
@@ -888,7 +895,7 @@ static void flush_pending_writes(struct r10conf *conf)
 			if (test_bit(Faulty, &rdev->flags)) {
 				bio_io_error(bio);
 			} else if (unlikely((bio_op(bio) ==  REQ_OP_DISCARD) &&
-					    !blk_queue_discard(bio->bi_bdev->bd_disk->queue)))
+					    !bdev_max_discard_sectors(bio->bi_bdev)))
 				/* Just ignore it */
 				bio_endio(bio);
 			else
@@ -1083,7 +1090,7 @@ static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)
 		if (test_bit(Faulty, &rdev->flags)) {
 			bio_io_error(bio);
 		} else if (unlikely((bio_op(bio) ==  REQ_OP_DISCARD) &&
-				    !blk_queue_discard(bio->bi_bdev->bd_disk->queue)))
+				    !bdev_max_discard_sectors(bio->bi_bdev)))
 			/* Just ignore it */
 			bio_endio(bio);
 		else
@@ -2144,8 +2151,6 @@ static int raid10_add_disk(struct mddev *mddev, struct md_rdev *rdev)
 		rcu_assign_pointer(p->rdev, rdev);
 		break;
 	}
-	if (mddev->queue && blk_queue_discard(bdev_get_queue(rdev->bdev)))
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, mddev->queue);
 
 	print_conf(conf);
 	return err;
@@ -4069,7 +4074,6 @@ static int raid10_run(struct mddev *mddev)
 	sector_t size;
 	sector_t min_offset_diff = 0;
 	int first = 1;
-	bool discard_supported = false;
 
 	if (mddev_init_writes_pending(mddev) < 0)
 		return -ENOMEM;
@@ -4140,20 +4144,9 @@ static int raid10_run(struct mddev *mddev)
 					  rdev->data_offset << 9);
 
 		disk->head_position = 0;
-
-		if (blk_queue_discard(bdev_get_queue(rdev->bdev)))
-			discard_supported = true;
 		first = 0;
 	}
 
-	if (mddev->queue) {
-		if (discard_supported)
-			blk_queue_flag_set(QUEUE_FLAG_DISCARD,
-						mddev->queue);
-		else
-			blk_queue_flag_clear(QUEUE_FLAG_DISCARD,
-						  mddev->queue);
-	}
 	/* need to check that every block has at least one working mirror */
 	if (!enough(conf, -1)) {
 		pr_err("md/raid10:%s: not enough operational mirrors.\n",
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index a7d50ff9020a..094a4042589e 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -1318,7 +1318,7 @@ static void r5l_write_super_and_discard_space(struct r5l_log *log,
 
 	r5l_write_super(log, end);
 
-	if (!blk_queue_discard(bdev_get_queue(bdev)))
+	if (!bdev_max_discard_sectors(bdev))
 		return;
 
 	mddev = log->rdev->mddev;
@@ -1344,14 +1344,14 @@ static void r5l_write_super_and_discard_space(struct r5l_log *log,
 	if (log->last_checkpoint < end) {
 		blkdev_issue_discard(bdev,
 				log->last_checkpoint + log->rdev->data_offset,
-				end - log->last_checkpoint, GFP_NOIO, 0);
+				end - log->last_checkpoint, GFP_NOIO);
 	} else {
 		blkdev_issue_discard(bdev,
 				log->last_checkpoint + log->rdev->data_offset,
 				log->device_size - log->last_checkpoint,
-				GFP_NOIO, 0);
+				GFP_NOIO);
 		blkdev_issue_discard(bdev, log->rdev->data_offset, end,
-				GFP_NOIO, 0);
+				GFP_NOIO);
 	}
 }
 
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 351d341a1ffa..59f91e392a2a 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -7242,7 +7242,7 @@ static struct r5conf *setup_conf(struct mddev *mddev)
 	rdev_for_each(rdev, mddev) {
 		if (test_bit(Journal, &rdev->flags))
 			continue;
-		if (blk_queue_nonrot(bdev_get_queue(rdev->bdev))) {
+		if (bdev_nonrot(rdev->bdev)) {
 			conf->batch_bio_dispatch = false;
 			break;
 		}
@@ -7776,14 +7776,10 @@ static int raid5_run(struct mddev *mddev)
 		 * A better idea might be to turn DISCARD into WRITE_ZEROES
 		 * requests, as that is required to be safe.
 		 */
-		if (devices_handle_discard_safely &&
-		    mddev->queue->limits.max_discard_sectors >= (stripe >> 9) &&
-		    mddev->queue->limits.discard_granularity >= stripe)
-			blk_queue_flag_set(QUEUE_FLAG_DISCARD,
-						mddev->queue);
-		else
-			blk_queue_flag_clear(QUEUE_FLAG_DISCARD,
-						mddev->queue);
+		if (!devices_handle_discard_safely ||
+		    mddev->queue->limits.max_discard_sectors < (stripe >> 9) ||
+		    mddev->queue->limits.discard_granularity < stripe)
+			blk_queue_max_discard_sectors(mddev->queue, 0);
 
 		blk_queue_max_hw_sectors(mddev->queue, UINT_MAX);
 	}
diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
index c69b2d9df6f1..a3d446005571 100644
--- a/drivers/mmc/core/queue.c
+++ b/drivers/mmc/core/queue.c
@@ -183,14 +183,13 @@ static void mmc_queue_setup_discard(struct request_queue *q,
 	if (!max_discard)
 		return;
 
-	blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
 	blk_queue_max_discard_sectors(q, max_discard);
 	q->limits.discard_granularity = card->pref_erase << 9;
 	/* granularity must not be greater than max. discard */
 	if (card->pref_erase > max_discard)
 		q->limits.discard_granularity = SECTOR_SIZE;
 	if (mmc_can_secure_erase_trim(card))
-		blk_queue_flag_set(QUEUE_FLAG_SECERASE, q);
+		blk_queue_max_secure_erase_sectors(q, max_discard);
 }
 
 static unsigned short mmc_get_max_segments(struct mmc_host *host)
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 64d2b093f114..f73172111465 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -377,7 +377,6 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
 	blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, new->rq);
 
 	if (tr->discard) {
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, new->rq);
 		blk_queue_max_discard_sectors(new->rq, UINT_MAX);
 		new->rq->limits.discard_granularity = tr->blksize;
 	}
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 1a984045e49c..c951d7b2cf48 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1621,7 +1621,7 @@ static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns)
 	u32 size = queue_logical_block_size(queue);
 
 	if (ctrl->max_discard_sectors == 0) {
-		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, queue);
+		blk_queue_max_discard_sectors(queue, 0);
 		return;
 	}
 
@@ -1632,7 +1632,7 @@ static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns)
 	queue->limits.discard_granularity = size;
 
 	/* If discard is already enabled, don't reset queue limits */
-	if (blk_queue_flag_test_and_set(QUEUE_FLAG_DISCARD, queue))
+	if (queue->limits.max_discard_sectors)
 		return;
 
 	blk_queue_max_discard_sectors(queue, ctrl->max_discard_sectors);
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 080f85f4105f..7ae72c7a211b 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -3831,6 +3831,9 @@ process_local_list:
 	return count;
 }
 
+static DEVICE_ATTR(nvme_discovery, 0200, NULL, nvme_fc_nvme_discovery_store);
+
+#ifdef CONFIG_BLK_CGROUP_FC_APPID
 /* Parse the cgroup id from a buf and return the length of cgrpid */
 static int fc_parse_cgrpid(const char *buf, u64 *id)
 {
@@ -3854,12 +3857,10 @@ static int fc_parse_cgrpid(const char *buf, u64 *id)
 }
 
 /*
- * fc_update_appid: Parse and update the appid in the blkcg associated with
- * cgroupid.
- * @buf: buf contains both cgrpid and appid info
- * @count: size of the buffer
+ * Parse and update the appid in the blkcg associated with the cgroupid.
  */
-static int fc_update_appid(const char *buf, size_t count)
+static ssize_t fc_appid_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
 {
 	u64 cgrp_id;
 	int appid_len = 0;
@@ -3887,23 +3888,14 @@ static int fc_update_appid(const char *buf, size_t count)
 		return ret;
 	return count;
 }
-
-static ssize_t fc_appid_store(struct device *dev,
-		struct device_attribute *attr, const char *buf, size_t count)
-{
-	int ret  = 0;
-
-	ret = fc_update_appid(buf, count);
-	if (ret < 0)
-		return -EINVAL;
-	return count;
-}
-static DEVICE_ATTR(nvme_discovery, 0200, NULL, nvme_fc_nvme_discovery_store);
 static DEVICE_ATTR(appid_store, 0200, NULL, fc_appid_store);
+#endif /* CONFIG_BLK_CGROUP_FC_APPID */
 
 static struct attribute *nvme_fc_attrs[] = {
 	&dev_attr_nvme_discovery.attr,
+#ifdef CONFIG_BLK_CGROUP_FC_APPID
 	&dev_attr_appid_store.attr,
+#endif
 	NULL
 };
 
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c
index d886c2c59554..27a72504d31c 100644
--- a/drivers/nvme/target/io-cmd-bdev.c
+++ b/drivers/nvme/target/io-cmd-bdev.c
@@ -360,7 +360,7 @@ static u16 nvmet_bdev_discard_range(struct nvmet_req *req,
 	ret = __blkdev_issue_discard(ns->bdev,
 			nvmet_lba_to_sect(ns, range->slba),
 			le32_to_cpu(range->nlb) << (ns->blksize_shift - 9),
-			GFP_KERNEL, 0, bio);
+			GFP_KERNEL, bio);
 	if (ret && ret != -EOPNOTSUPP) {
 		req->error_slba = le64_to_cpu(range->slba);
 		return errno_to_nvme_status(req, ret);
diff --git a/drivers/nvme/target/zns.c b/drivers/nvme/target/zns.c
index e34718b09550..82b61acf7a72 100644
--- a/drivers/nvme/target/zns.c
+++ b/drivers/nvme/target/zns.c
@@ -34,8 +34,7 @@ static int validate_conv_zones_cb(struct blk_zone *z,
 
 bool nvmet_bdev_zns_enable(struct nvmet_ns *ns)
 {
-	struct request_queue *q = ns->bdev->bd_disk->queue;
-	u8 zasl = nvmet_zasl(queue_max_zone_append_sectors(q));
+	u8 zasl = nvmet_zasl(bdev_max_zone_append_sectors(ns->bdev));
 	struct gendisk *bd_disk = ns->bdev->bd_disk;
 	int ret;
 
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index e084f4dedddd..8bd5665db919 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -791,7 +791,6 @@ static void dasd_fba_setup_blk_queue(struct dasd_block *block)
 
 	blk_queue_max_discard_sectors(q, max_discard_sectors);
 	blk_queue_max_write_zeroes_sectors(q, max_discard_sectors);
-	blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
 }
 
 static int dasd_fba_pe_handler(struct dasd_device *device,
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index ba9dbb51b75f..f6b83853f7ee 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -5528,7 +5528,9 @@ static char *lpfc_is_command_vm_io(struct scsi_cmnd *cmd)
 {
 	struct bio *bio = scsi_cmd_to_rq(cmd)->bio;
 
-	return bio ? blkcg_get_fc_appid(bio) : NULL;
+	if (!IS_ENABLED(CONFIG_BLK_CGROUP_FC_APPID) || !bio)
+		return NULL;
+	return blkcg_get_fc_appid(bio);
 }
 
 /**
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index dc6e55761fd1..9694e2cfaf9a 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -797,7 +797,6 @@ static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
 	case SD_LBP_FULL:
 	case SD_LBP_DISABLE:
 		blk_queue_max_discard_sectors(q, 0);
-		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
 		return;
 
 	case SD_LBP_UNMAP:
@@ -830,7 +829,6 @@ static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
 	}
 
 	blk_queue_max_discard_sectors(q, max_blocks * (logical_block_size >> 9));
-	blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
 }
 
 static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index 44bb380e7390..25f33eb25337 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -829,28 +829,26 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
 }
 
 /*
- * Check if the underlying struct block_device request_queue supports
- * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM
- * in ATA and we need to set TPE=1
+ * Check if the underlying struct block_device supports discard and if yes
+ * configure the UNMAP parameters.
  */
 bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
-				       struct request_queue *q)
+				       struct block_device *bdev)
 {
-	int block_size = queue_logical_block_size(q);
+	int block_size = bdev_logical_block_size(bdev);
 
-	if (!blk_queue_discard(q))
+	if (!bdev_max_discard_sectors(bdev))
 		return false;
 
 	attrib->max_unmap_lba_count =
-		q->limits.max_discard_sectors >> (ilog2(block_size) - 9);
+		bdev_max_discard_sectors(bdev) >> (ilog2(block_size) - 9);
 	/*
 	 * Currently hardcoded to 1 in Linux/SCSI code..
 	 */
 	attrib->max_unmap_block_desc_count = 1;
-	attrib->unmap_granularity = q->limits.discard_granularity / block_size;
-	attrib->unmap_granularity_alignment = q->limits.discard_alignment /
-								block_size;
-	attrib->unmap_zeroes_data = !!(q->limits.max_write_zeroes_sectors);
+	attrib->unmap_granularity = bdev_discard_granularity(bdev) / block_size;
+	attrib->unmap_granularity_alignment =
+		bdev_discard_alignment(bdev) / block_size;
 	return true;
 }
 EXPORT_SYMBOL(target_configure_unmap_from_queue);
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index 8190b840065f..e68f1cc8ef98 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -134,10 +134,10 @@ static int fd_configure_device(struct se_device *dev)
 	 */
 	inode = file->f_mapping->host;
 	if (S_ISBLK(inode->i_mode)) {
-		struct request_queue *q = bdev_get_queue(I_BDEV(inode));
+		struct block_device *bdev = I_BDEV(inode);
 		unsigned long long dev_size;
 
-		fd_dev->fd_block_size = bdev_logical_block_size(I_BDEV(inode));
+		fd_dev->fd_block_size = bdev_logical_block_size(bdev);
 		/*
 		 * Determine the number of bytes from i_size_read() minus
 		 * one (1) logical sector from underlying struct block_device
@@ -150,7 +150,7 @@ static int fd_configure_device(struct se_device *dev)
 			dev_size, div_u64(dev_size, fd_dev->fd_block_size),
 			fd_dev->fd_block_size);
 
-		if (target_configure_unmap_from_queue(&dev->dev_attrib, q))
+		if (target_configure_unmap_from_queue(&dev->dev_attrib, bdev))
 			pr_debug("IFILE: BLOCK Discard support available,"
 				 " disabled by default\n");
 		/*
@@ -159,7 +159,7 @@ static int fd_configure_device(struct se_device *dev)
 		 */
 		dev->dev_attrib.max_write_same_len = 0xFFFF;
 
-		if (blk_queue_nonrot(q))
+		if (bdev_nonrot(bdev))
 			dev->dev_attrib.is_nonrot = 1;
 	} else {
 		if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) {
@@ -558,7 +558,7 @@ fd_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb)
 		ret = blkdev_issue_discard(bdev,
 					   target_to_linux_sector(dev, lba),
 					   target_to_linux_sector(dev,  nolb),
-					   GFP_KERNEL, 0);
+					   GFP_KERNEL);
 		if (ret < 0) {
 			pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n",
 				ret);
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 87ede165ddba..378c80313a0f 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -119,7 +119,7 @@ static int iblock_configure_device(struct se_device *dev)
 	dev->dev_attrib.hw_max_sectors = queue_max_hw_sectors(q);
 	dev->dev_attrib.hw_queue_depth = q->nr_requests;
 
-	if (target_configure_unmap_from_queue(&dev->dev_attrib, q))
+	if (target_configure_unmap_from_queue(&dev->dev_attrib, bd))
 		pr_debug("IBLOCK: BLOCK Discard support available,"
 			 " disabled by default\n");
 
@@ -133,7 +133,7 @@ static int iblock_configure_device(struct se_device *dev)
 	else
 		dev->dev_attrib.max_write_same_len = 0xFFFF;
 
-	if (blk_queue_nonrot(q))
+	if (bdev_nonrot(bd))
 		dev->dev_attrib.is_nonrot = 1;
 
 	bi = bdev_get_integrity(bd);
@@ -434,7 +434,7 @@ iblock_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb)
 	ret = blkdev_issue_discard(bdev,
 				   target_to_linux_sector(dev, lba),
 				   target_to_linux_sector(dev,  nolb),
-				   GFP_KERNEL, 0);
+				   GFP_KERNEL);
 	if (ret < 0) {
 		pr_err("blkdev_issue_discard() failed: %d\n", ret);
 		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
@@ -727,17 +727,16 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
 
 	if (data_direction == DMA_TO_DEVICE) {
 		struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
-		struct request_queue *q = bdev_get_queue(ib_dev->ibd_bd);
 		/*
 		 * Force writethrough using REQ_FUA if a volatile write cache
 		 * is not enabled, or if initiator set the Force Unit Access bit.
 		 */
 		opf = REQ_OP_WRITE;
 		miter_dir = SG_MITER_TO_SG;
-		if (test_bit(QUEUE_FLAG_FUA, &q->queue_flags)) {
+		if (bdev_fua(ib_dev->ibd_bd)) {
 			if (cmd->se_cmd_flags & SCF_FUA)
 				opf |= REQ_FUA;
-			else if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags))
+			else if (!bdev_write_cache(ib_dev->ibd_bd))
 				opf |= REQ_FUA;
 		}
 	} else {
@@ -886,11 +885,7 @@ iblock_parse_cdb(struct se_cmd *cmd)
 
 static bool iblock_get_write_cache(struct se_device *dev)
 {
-	struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
-	struct block_device *bd = ib_dev->ibd_bd;
-	struct request_queue *q = bdev_get_queue(bd);
-
-	return test_bit(QUEUE_FLAG_WC, &q->queue_flags);
+	return bdev_write_cache(IBLOCK_DEV(dev)->ibd_bd);
 }
 
 static const struct target_backend_ops iblock_ops = {
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 60dafe4c581b..bb3fb18b2316 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -818,24 +818,8 @@ static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b)
 
 static void pscsi_bi_endio(struct bio *bio)
 {
-	bio_put(bio);
-}
-
-static inline struct bio *pscsi_get_bio(int nr_vecs)
-{
-	struct bio *bio;
-	/*
-	 * Use bio_malloc() following the comment in for bio -> struct request
-	 * in block/blk-core.c:blk_make_request()
-	 */
-	bio = bio_kmalloc(GFP_KERNEL, nr_vecs);
-	if (!bio) {
-		pr_err("PSCSI: bio_kmalloc() failed\n");
-		return NULL;
-	}
-	bio->bi_end_io = pscsi_bi_endio;
-
-	return bio;
+	bio_uninit(bio);
+	kfree(bio);
 }
 
 static sense_reason_t
@@ -878,15 +862,12 @@ pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
 			if (!bio) {
 new_bio:
 				nr_vecs = bio_max_segs(nr_pages);
-				/*
-				 * Calls bio_kmalloc() and sets bio->bi_end_io()
-				 */
-				bio = pscsi_get_bio(nr_vecs);
+				bio = bio_kmalloc(nr_vecs, GFP_KERNEL);
 				if (!bio)
 					goto fail;
-
-				if (rw)
-					bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
+				bio_init(bio, NULL, bio->bi_inline_vecs, nr_vecs,
+					 rw ? REQ_OP_WRITE : REQ_OP_READ);
+				bio->bi_end_io = pscsi_bi_endio;
 
 				pr_debug("PSCSI: Allocated bio: %p,"
 					" dir: %s nr_vecs: %d\n", bio,
@@ -912,11 +893,6 @@ new_bio:
 					goto fail;
 				}
 
-				/*
-				 * Clear the pointer so that another bio will
-				 * be allocated with pscsi_get_bio() above.
-				 */
-				bio = NULL;
 				goto new_bio;
 			}