32 files changed, 10 insertions, 303 deletions

diff --git a/block/bio.c b/block/bio.c
index 33979f306e9e..cdd7b2915c53 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -257,7 +257,6 @@ void bio_init(struct bio *bio, struct block_device *bdev, struct bio_vec *table,
 	bio->bi_opf = opf;
 	bio->bi_flags = 0;
 	bio->bi_ioprio = 0;
-	bio->bi_write_hint = 0;
 	bio->bi_status = 0;
 	bio->bi_iter.bi_sector = 0;
 	bio->bi_iter.bi_size = 0;
@@ -737,7 +736,6 @@ static int __bio_clone(struct bio *bio, struct bio *bio_src, gfp_t gfp)
 	    bio_flagged(bio_src, BIO_REMAPPED))
 		bio_set_flag(bio, BIO_REMAPPED);
 	bio->bi_ioprio = bio_src->bi_ioprio;
-	bio->bi_write_hint = bio_src->bi_write_hint;
 	bio->bi_iter = bio_src->bi_iter;
 
 	bio_clone_blkg_association(bio, bio_src);
diff --git a/block/blk-crypto-fallback.c b/block/blk-crypto-fallback.c
index 18c8eafe20b9..7c854584b52b 100644
--- a/block/blk-crypto-fallback.c
+++ b/block/blk-crypto-fallback.c
@@ -170,7 +170,6 @@ static struct bio *blk_crypto_fallback_clone_bio(struct bio *bio_src)
 		bio_set_flag(bio, BIO_REMAPPED);
 	bio->bi_opf		= bio_src->bi_opf;
 	bio->bi_ioprio		= bio_src->bi_ioprio;
-	bio->bi_write_hint	= bio_src->bi_write_hint;
 	bio->bi_iter.bi_sector	= bio_src->bi_iter.bi_sector;
 	bio->bi_iter.bi_size	= bio_src->bi_iter.bi_size;
 
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 49d0d0da0bf2..7771dacc99cb 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -754,13 +754,6 @@ static struct request *attempt_merge(struct request_queue *q,
 	if (rq_data_dir(req) != rq_data_dir(next))
 		return NULL;
 
-	/*
-	 * Don't allow merge of different write hints, or for a hint with
-	 * non-hint IO.
-	 */
-	if (req->write_hint != next->write_hint)
-		return NULL;
-
 	if (req->ioprio != next->ioprio)
 		return NULL;
 
@@ -886,13 +879,6 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
 	if (!bio_crypt_rq_ctx_compatible(rq, bio))
 		return false;
 
-	/*
-	 * Don't allow merge of different write hints, or for a hint with
-	 * non-hint IO.
-	 */
-	if (rq->write_hint != bio->bi_write_hint)
-		return false;
-
 	if (rq->ioprio != bio_prio(bio))
 		return false;
 
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index e2880f6deb34..aa0349e9f083 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -183,35 +183,11 @@ inval:
 	return count;
 }
 
-static int queue_write_hint_show(void *data, struct seq_file *m)
-{
-	struct request_queue *q = data;
-	int i;
-
-	for (i = 0; i < BLK_MAX_WRITE_HINTS; i++)
-		seq_printf(m, "hint%d: %llu\n", i, q->write_hints[i]);
-
-	return 0;
-}
-
-static ssize_t queue_write_hint_store(void *data, const char __user *buf,
-				      size_t count, loff_t *ppos)
-{
-	struct request_queue *q = data;
-	int i;
-
-	for (i = 0; i < BLK_MAX_WRITE_HINTS; i++)
-		q->write_hints[i] = 0;
-
-	return count;
-}
-
 static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = {
 	{ "poll_stat", 0400, queue_poll_stat_show },
 	{ "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops },
 	{ "pm_only", 0600, queue_pm_only_show, NULL },
 	{ "state", 0600, queue_state_show, queue_state_write },
-	{ "write_hints", 0600, queue_write_hint_show, queue_write_hint_store },
 	{ "zone_wlock", 0400, queue_zone_wlock_show, NULL },
 	{ },
 };
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 8e659dc5fcf3..e6f24fa4a4c2 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2412,7 +2412,6 @@ static void blk_mq_bio_to_request(struct request *rq, struct bio *bio,
 		rq->cmd_flags |= REQ_FAILFAST_MASK;
 
 	rq->__sector = bio->bi_iter.bi_sector;
-	rq->write_hint = bio->bi_write_hint;
 	blk_rq_bio_prep(rq, bio, nr_segs);
 
 	/* This can't fail, since GFP_NOIO includes __GFP_DIRECT_RECLAIM. */
diff --git a/block/bounce.c b/block/bounce.c
index 2d32ff6a0f12..467be46d0e65 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -169,7 +169,6 @@ static struct bio *bounce_clone_bio(struct bio *bio_src)
 	if (bio_flagged(bio_src, BIO_REMAPPED))
 		bio_set_flag(bio, BIO_REMAPPED);
 	bio->bi_ioprio		= bio_src->bi_ioprio;
-	bio->bi_write_hint	= bio_src->bi_write_hint;
 	bio->bi_iter.bi_sector	= bio_src->bi_iter.bi_sector;
 	bio->bi_iter.bi_size	= bio_src->bi_iter.bi_size;
 
diff --git a/block/fops.c b/block/fops.c
index e49096354dcd..9f2ecec406b0 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -83,7 +83,6 @@ static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb,
 		bio_init(&bio, bdev, vecs, nr_pages, dio_bio_write_op(iocb));
 	}
 	bio.bi_iter.bi_sector = pos >> SECTOR_SHIFT;
-	bio.bi_write_hint = iocb->ki_hint;
 	bio.bi_private = current;
 	bio.bi_end_io = blkdev_bio_end_io_simple;
 	bio.bi_ioprio = iocb->ki_ioprio;
@@ -225,7 +224,6 @@ static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
 
 	for (;;) {
 		bio->bi_iter.bi_sector = pos >> SECTOR_SHIFT;
-		bio->bi_write_hint = iocb->ki_hint;
 		bio->bi_private = dio;
 		bio->bi_end_io = blkdev_bio_end_io;
 		bio->bi_ioprio = iocb->ki_ioprio;
@@ -327,7 +325,6 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
 	dio->flags = 0;
 	dio->iocb = iocb;
 	bio->bi_iter.bi_sector = pos >> SECTOR_SHIFT;
-	bio->bi_write_hint = iocb->ki_hint;
 	bio->bi_end_io = blkdev_bio_end_io_async;
 	bio->bi_ioprio = iocb->ki_ioprio;
 
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 800a17aad6e6..99d5464a51f8 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1136,8 +1136,6 @@ static void alloc_behind_master_bio(struct r1bio *r1_bio,
 		goto skip_copy;
 	}
 
-	behind_bio->bi_write_hint = bio->bi_write_hint;
-
 	while (i < vcnt && size) {
 		struct page *page;
 		int len = min_t(int, PAGE_SIZE, size);
diff --git a/drivers/md/raid5-ppl.c b/drivers/md/raid5-ppl.c
index ea4cd8dd4dc3..d3962d92df18 100644
--- a/drivers/md/raid5-ppl.c
+++ b/drivers/md/raid5-ppl.c
@@ -466,7 +466,6 @@ static void ppl_submit_iounit(struct ppl_io_unit *io)
 	bio->bi_end_io = ppl_log_endio;
 	bio->bi_iter.bi_sector = log->next_io_sector;
 	bio_add_page(bio, io->header_page, PAGE_SIZE, 0);
-	bio->bi_write_hint = ppl_conf->write_hint;
 
 	pr_debug("%s: log->current_io_sector: %llu\n", __func__,
 	    (unsigned long long)log->next_io_sector);
@@ -496,7 +495,6 @@ static void ppl_submit_iounit(struct ppl_io_unit *io)
 			bio = bio_alloc_bioset(prev->bi_bdev, BIO_MAX_VECS,
 					       prev->bi_opf, GFP_NOIO,
 					       &ppl_conf->bs);
-			bio->bi_write_hint = prev->bi_write_hint;
 			bio->bi_iter.bi_sector = bio_end_sector(prev);
 			bio_add_page(bio, sh->ppl_page, PAGE_SIZE, 0);
 
@@ -1396,7 +1394,6 @@ int ppl_init_log(struct r5conf *conf)
 	atomic64_set(&ppl_conf->seq, 0);
 	INIT_LIST_HEAD(&ppl_conf->no_mem_stripes);
 	spin_lock_init(&ppl_conf->no_mem_stripes_lock);
-	ppl_conf->write_hint = RWH_WRITE_LIFE_NOT_SET;
 
 	if (!mddev->external) {
 		ppl_conf->signature = ~crc32c_le(~0, mddev->uuid, sizeof(mddev->uuid));
@@ -1495,25 +1492,13 @@ int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add)
 static ssize_t
 ppl_write_hint_show(struct mddev *mddev, char *buf)
 {
-	size_t ret = 0;
-	struct r5conf *conf;
-	struct ppl_conf *ppl_conf = NULL;
-
-	spin_lock(&mddev->lock);
-	conf = mddev->private;
-	if (conf && raid5_has_ppl(conf))
-		ppl_conf = conf->log_private;
-	ret = sprintf(buf, "%d\n", ppl_conf ? ppl_conf->write_hint : 0);
-	spin_unlock(&mddev->lock);
-
-	return ret;
+	return sprintf(buf, "%d\n", 0);
 }
 
 static ssize_t
 ppl_write_hint_store(struct mddev *mddev, const char *page, size_t len)
 {
 	struct r5conf *conf;
-	struct ppl_conf *ppl_conf;
 	int err = 0;
 	unsigned short new;
 
@@ -1527,17 +1512,10 @@ ppl_write_hint_store(struct mddev *mddev, const char *page, size_t len)
 		return err;
 
 	conf = mddev->private;
-	if (!conf) {
+	if (!conf)
 		err = -ENODEV;
-	} else if (raid5_has_ppl(conf)) {
-		ppl_conf = conf->log_private;
-		if (!ppl_conf)
-			err = -EINVAL;
-		else
-			ppl_conf->write_hint = new;
-	} else {
+	else if (!raid5_has_ppl(conf) || !conf->log_private)
 		err = -EINVAL;
-	}
 
 	mddev_unlock(mddev);
 
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index afecb1c765bf..351d341a1ffa 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1211,9 +1211,6 @@ again:
 			bi->bi_io_vec[0].bv_len = RAID5_STRIPE_SIZE(conf);
 			bi->bi_io_vec[0].bv_offset = sh->dev[i].offset;
 			bi->bi_iter.bi_size = RAID5_STRIPE_SIZE(conf);
-			bi->bi_write_hint = sh->dev[i].write_hint;
-			if (!rrdev)
-				sh->dev[i].write_hint = RWH_WRITE_LIFE_NOT_SET;
 			/*
 			 * If this is discard request, set bi_vcnt 0. We don't
 			 * want to confuse SCSI because SCSI will replace payload
@@ -1264,8 +1261,6 @@ again:
 			rbi->bi_io_vec[0].bv_len = RAID5_STRIPE_SIZE(conf);
 			rbi->bi_io_vec[0].bv_offset = sh->dev[i].offset;
 			rbi->bi_iter.bi_size = RAID5_STRIPE_SIZE(conf);
-			rbi->bi_write_hint = sh->dev[i].write_hint;
-			sh->dev[i].write_hint = RWH_WRITE_LIFE_NOT_SET;
 			/*
 			 * If this is discard request, set bi_vcnt 0. We don't
 			 * want to confuse SCSI because SCSI will replace payload
@@ -3407,7 +3402,6 @@ static int add_stripe_bio(struct stripe_head *sh, struct bio *bi, int dd_idx,
 		(unsigned long long)sh->sector);
 
 	spin_lock_irq(&sh->stripe_lock);
-	sh->dev[dd_idx].write_hint = bi->bi_write_hint;
 	/* Don't allow new IO added to stripes in batch list */
 	if (sh->batch_head)
 		goto overlap;
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index cd6eac8e3dd6..aeda4d0975fc 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -77,10 +77,6 @@ module_param(apst_secondary_latency_tol_us, ulong, 0644);
 MODULE_PARM_DESC(apst_secondary_latency_tol_us,
 	"secondary APST latency tolerance in us");
 
-static bool streams;
-module_param(streams, bool, 0644);
-MODULE_PARM_DESC(streams, "turn on support for Streams write directives");
-
 /*
  * nvme_wq - hosts nvme related works that are not reset or delete
  * nvme_reset_wq - hosts nvme reset works
@@ -720,108 +716,6 @@ bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
 }
 EXPORT_SYMBOL_GPL(__nvme_check_ready);
 
-static int nvme_toggle_streams(struct nvme_ctrl *ctrl, bool enable)
-{
-	struct nvme_command c = { };
-
-	c.directive.opcode = nvme_admin_directive_send;
-	c.directive.nsid = cpu_to_le32(NVME_NSID_ALL);
-	c.directive.doper = NVME_DIR_SND_ID_OP_ENABLE;
-	c.directive.dtype = NVME_DIR_IDENTIFY;
-	c.directive.tdtype = NVME_DIR_STREAMS;
-	c.directive.endir = enable ? NVME_DIR_ENDIR : 0;
-
-	return nvme_submit_sync_cmd(ctrl->admin_q, &c, NULL, 0);
-}
-
-static int nvme_disable_streams(struct nvme_ctrl *ctrl)
-{
-	return nvme_toggle_streams(ctrl, false);
-}
-
-static int nvme_enable_streams(struct nvme_ctrl *ctrl)
-{
-	return nvme_toggle_streams(ctrl, true);
-}
-
-static int nvme_get_stream_params(struct nvme_ctrl *ctrl,
-				  struct streams_directive_params *s, u32 nsid)
-{
-	struct nvme_command c = { };
-
-	memset(s, 0, sizeof(*s));
-
-	c.directive.opcode = nvme_admin_directive_recv;
-	c.directive.nsid = cpu_to_le32(nsid);
-	c.directive.numd = cpu_to_le32(nvme_bytes_to_numd(sizeof(*s)));
-	c.directive.doper = NVME_DIR_RCV_ST_OP_PARAM;
-	c.directive.dtype = NVME_DIR_STREAMS;
-
-	return nvme_submit_sync_cmd(ctrl->admin_q, &c, s, sizeof(*s));
-}
-
-static int nvme_configure_directives(struct nvme_ctrl *ctrl)
-{
-	struct streams_directive_params s;
-	u16 nssa;
-	int ret;
-
-	if (!(ctrl->oacs & NVME_CTRL_OACS_DIRECTIVES))
-		return 0;
-	if (!streams)
-		return 0;
-
-	ret = nvme_enable_streams(ctrl);
-	if (ret)
-		return ret;
-
-	ret = nvme_get_stream_params(ctrl, &s, NVME_NSID_ALL);
-	if (ret)
-		goto out_disable_stream;
-
-	nssa = le16_to_cpu(s.nssa);
-	if (nssa < BLK_MAX_WRITE_HINTS - 1) {
-		dev_info(ctrl->device, "too few streams (%u) available\n",
-					nssa);
-		/* this condition is not an error: streams are optional */
-		ret = 0;
-		goto out_disable_stream;
-	}
-
-	ctrl->nr_streams = min_t(u16, nssa, BLK_MAX_WRITE_HINTS - 1);
-	dev_info(ctrl->device, "Using %u streams\n", ctrl->nr_streams);
-	return 0;
-
-out_disable_stream:
-	nvme_disable_streams(ctrl);
-	return ret;
-}
-
-/*
- * Check if 'req' has a write hint associated with it. If it does, assign
- * a valid namespace stream to the write.
- */
-static void nvme_assign_write_stream(struct nvme_ctrl *ctrl,
-				     struct request *req, u16 *control,
-				     u32 *dsmgmt)
-{
-	enum rw_hint streamid = req->write_hint;
-
-	if (streamid == WRITE_LIFE_NOT_SET || streamid == WRITE_LIFE_NONE)
-		streamid = 0;
-	else {
-		streamid--;
-		if (WARN_ON_ONCE(streamid > ctrl->nr_streams))
-			return;
-
-		*control |= NVME_RW_DTYPE_STREAMS;
-		*dsmgmt |= streamid << 16;
-	}
-
-	if (streamid < ARRAY_SIZE(req->q->write_hints))
-		req->q->write_hints[streamid] += blk_rq_bytes(req) >> 9;
-}
-
 static inline void nvme_setup_flush(struct nvme_ns *ns,
 		struct nvme_command *cmnd)
 {
@@ -925,7 +819,6 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
 		struct request *req, struct nvme_command *cmnd,
 		enum nvme_opcode op)
 {
-	struct nvme_ctrl *ctrl = ns->ctrl;
 	u16 control = 0;
 	u32 dsmgmt = 0;
 
@@ -948,9 +841,6 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
 	cmnd->rw.apptag = 0;
 	cmnd->rw.appmask = 0;
 
-	if (req_op(req) == REQ_OP_WRITE && ctrl->nr_streams)
-		nvme_assign_write_stream(ctrl, req, &control, &dsmgmt);
-
 	if (ns->ms) {
 		/*
 		 * If formated with metadata, the block layer always provides a
@@ -1673,9 +1563,6 @@ static void nvme_config_discard(struct gendisk *disk, struct nvme_ns *ns)
 		return;
 	}
 
-	if (ctrl->nr_streams && ns->sws && ns->sgs)
-		size *= ns->sws * ns->sgs;
-
 	BUILD_BUG_ON(PAGE_SIZE / sizeof(struct nvme_dsm_range) <
 			NVME_DSM_MAX_RANGES);
 
@@ -1701,31 +1588,6 @@ static bool nvme_ns_ids_equal(struct nvme_ns_ids *a, struct nvme_ns_ids *b)
 		a->csi == b->csi;
 }
 
-static int nvme_setup_streams_ns(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
-				 u32 *phys_bs, u32 *io_opt)
-{
-	struct streams_directive_params s;
-	int ret;
-
-	if (!ctrl->nr_streams)
-		return 0;
-
-	ret = nvme_get_stream_params(ctrl, &s, ns->head->ns_id);
-	if (ret)
-		return ret;
-
-	ns->sws = le32_to_cpu(s.sws);
-	ns->sgs = le16_to_cpu(s.sgs);
-
-	if (ns->sws) {
-		*phys_bs = ns->sws * (1 << ns->lba_shift);
-		if (ns->sgs)
-			*io_opt = *phys_bs * ns->sgs;
-	}
-
-	return 0;
-}
-
 static void nvme_configure_metadata(struct nvme_ns *ns, struct nvme_id_ns *id)
 {
 	struct nvme_ctrl *ctrl = ns->ctrl;
@@ -1817,7 +1679,6 @@ static void nvme_update_disk_info(struct gendisk *disk,
 	blk_integrity_unregister(disk);
 
 	atomic_bs = phys_bs = bs;
-	nvme_setup_streams_ns(ns->ctrl, ns, &phys_bs, &io_opt);
 	if (id->nabo == 0) {
 		/*
 		 * Bit 1 indicates whether NAWUPF is defined for this namespace
@@ -3107,10 +2968,6 @@ int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl)
 	if (ret < 0)
 		return ret;
 
-	ret = nvme_configure_directives(ctrl);
-	if (ret < 0)
-		return ret;
-
 	ret = nvme_configure_acre(ctrl);
 	if (ret < 0)
 		return ret;
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 1ea908d43e17..293a93a15fa6 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -280,7 +280,6 @@ struct nvme_ctrl {
 	u16 crdt[3];
 	u16 oncs;
 	u16 oacs;
-	u16 nr_streams;
 	u16 sqsize;
 	u32 max_namespaces;
 	atomic_t abort_limit;
diff --git a/fs/aio.c b/fs/aio.c
index d6b7160c2a77..7b66b93d5bfa 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1478,7 +1478,6 @@ static int aio_prep_rw(struct kiocb *req, const struct iocb *iocb)
 	req->ki_flags = iocb_flags(req->ki_filp);
 	if (iocb->aio_flags & IOCB_FLAG_RESFD)
 		req->ki_flags |= IOCB_EVENTFD;
-	req->ki_hint = ki_hint_validate(file_write_hint(req->ki_filp));
 	if (iocb->aio_flags & IOCB_FLAG_IOPRIO) {
 		/*
 		 * If the IOCB_FLAG_IOPRIO flag of aio_flags is set, then
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d78b3a2d04e3..724e8fe06aa0 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3329,7 +3329,6 @@ static int alloc_new_bio(struct btrfs_inode *inode,
 	bio_ctrl->bio_flags = bio_flags;
 	bio->bi_end_io = end_io_func;
 	bio->bi_private = &inode->io_tree;
-	bio->bi_write_hint = inode->vfs_inode.i_write_hint;
 	bio->bi_opf = opf;
 	ret = calc_bio_boundaries(bio_ctrl, inode, file_offset);
 	if (ret < 0)
diff --git a/fs/buffer.c b/fs/buffer.c
index ed26cb1d381d..d67fbe063a3a 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -53,7 +53,7 @@
 
 static int fsync_buffers_list(spinlock_t *lock, struct list_head *list);
 static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
-			 enum rw_hint hint, struct writeback_control *wbc);
+			 struct writeback_control *wbc);
 
 #define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)
 
@@ -1804,8 +1804,7 @@ int __block_write_full_page(struct inode *inode, struct page *page,
 	do {
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
-			submit_bh_wbc(REQ_OP_WRITE, write_flags, bh,
-					inode->i_write_hint, wbc);
+			submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc);
 			nr_underway++;
 		}
 		bh = next;
@@ -1859,8 +1858,7 @@ recover:
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
 			clear_buffer_dirty(bh);
-			submit_bh_wbc(REQ_OP_WRITE, write_flags, bh,
-					inode->i_write_hint, wbc);
+			submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc);
 			nr_underway++;
 		}
 		bh = next;
@@ -3004,7 +3002,7 @@ static void end_bio_bh_io_sync(struct bio *bio)
 }
 
 static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
-			 enum rw_hint write_hint, struct writeback_control *wbc)
+			 struct writeback_control *wbc)
 {
 	struct bio *bio;
 
@@ -3030,7 +3028,6 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
 	fscrypt_set_bio_crypt_ctx_bh(bio, bh, GFP_NOIO);
 
 	bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
-	bio->bi_write_hint = write_hint;
 
 	bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh));
 	BUG_ON(bio->bi_iter.bi_size != bh->b_size);
@@ -3052,7 +3049,7 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
 
 int submit_bh(int op, int op_flags, struct buffer_head *bh)
 {
-	return submit_bh_wbc(op, op_flags, bh, 0, NULL);
+	return submit_bh_wbc(op, op_flags, bh, NULL);
 }
 EXPORT_SYMBOL(submit_bh);
 
diff --git a/fs/cachefiles/io.c b/fs/cachefiles/io.c
index 753986ea1583..bc7c7a7d9260 100644
--- a/fs/cachefiles/io.c
+++ b/fs/cachefiles/io.c
@@ -138,7 +138,6 @@ static int cachefiles_read(struct netfs_cache_resources *cres,
 	ki->iocb.ki_filp	= file;
 	ki->iocb.ki_pos		= start_pos + skipped;
 	ki->iocb.ki_flags	= IOCB_DIRECT;
-	ki->iocb.ki_hint	= ki_hint_validate(file_write_hint(file));
 	ki->iocb.ki_ioprio	= get_current_ioprio();
 	ki->skipped		= skipped;
 	ki->object		= object;
@@ -313,7 +312,6 @@ static int cachefiles_write(struct netfs_cache_resources *cres,
 	ki->iocb.ki_filp	= file;
 	ki->iocb.ki_pos		= start_pos;
 	ki->iocb.ki_flags	= IOCB_DIRECT | IOCB_WRITE;
-	ki->iocb.ki_hint	= ki_hint_validate(file_write_hint(file));
 	ki->iocb.ki_ioprio	= get_current_ioprio();
 	ki->object		= object;
 	ki->inval_counter	= cres->inval_counter;
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 38bca4980a1c..aef06e607b40 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -402,9 +402,6 @@ dio_bio_alloc(struct dio *dio, struct dio_submit *sdio,
 		bio->bi_end_io = dio_bio_end_aio;
 	else
 		bio->bi_end_io = dio_bio_end_io;
-
-	bio->bi_write_hint = dio->iocb->ki_hint;
-
 	sdio->bio = bio;
 	sdio->logical_offset_in_bio = sdio->cur_page_fs_offset;
 }
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 17bb78ebd784..495ce59fb4ad 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -373,7 +373,6 @@ void ext4_io_submit(struct ext4_io_submit *io)
 	if (bio) {
 		if (io->io_wbc->sync_mode == WB_SYNC_ALL)
 			io->io_bio->bi_opf |= REQ_SYNC;
-		io->io_bio->bi_write_hint = io->io_end->inode->i_write_hint;
 		submit_bio(io->io_bio);
 	}
 	io->io_bio = NULL;
@@ -418,10 +417,8 @@ static void io_submit_add_bh(struct ext4_io_submit *io,
 submit_and_retry:
 		ext4_io_submit(io);
 	}
-	if (io->io_bio == NULL) {
+	if (io->io_bio == NULL)
 		io_submit_init_bio(io, bh);
-		io->io_bio->bi_write_hint = inode->i_write_hint;
-	}
 	ret = bio_add_page(io->io_bio, page, bh->b_size, bh_offset(bh));
 	if (ret != bh->b_size)
 		goto submit_and_retry;
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index b3131fc8762d..f8fcbe91059b 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -428,8 +428,6 @@ static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
 	} else {
 		bio->bi_end_io = f2fs_write_end_io;
 		bio->bi_private = sbi;
-		bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
-						fio->type, fio->temp);
 	}
 	iostat_alloc_and_bind_ctx(sbi, bio, NULL);
 
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 68ddf4c7ca64..d3f39a704b8b 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -4482,10 +4482,8 @@ static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
 	struct f2fs_inode_info *fi = F2FS_I(inode);
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	const bool do_opu = f2fs_lfs_mode(sbi);
-	const int whint_mode = F2FS_OPTION(sbi).whint_mode;
 	const loff_t pos = iocb->ki_pos;
 	const ssize_t count = iov_iter_count(from);
-	const enum rw_hint hint = iocb->ki_hint;
 	unsigned int dio_flags;
 	struct iomap_dio *dio;
 	ssize_t ret;
@@ -4518,8 +4516,6 @@ static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
 		if (do_opu)
 			f2fs_down_read(&fi->i_gc_rwsem[READ]);
 	}
-	if (whint_mode == WHINT_MODE_OFF)
-		iocb->ki_hint = WRITE_LIFE_NOT_SET;
 
 	/*
 	 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of
@@ -4542,8 +4538,6 @@ static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
 		ret = iomap_dio_complete(dio);
 	}
 
-	if (whint_mode == WHINT_MODE_OFF)
-		iocb->ki_hint = hint;
 	if (do_opu)
 		f2fs_up_read(&fi->i_gc_rwsem[READ]);
 	f2fs_up_read(&fi->i_gc_rwsem[WRITE]);
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 9c6c6a3e2de5..f15d885b9796 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -291,22 +291,6 @@ static long fcntl_rw_hint(struct file *file, unsigned int cmd,
 	u64 h;
 
 	switch (cmd) {
-	case F_GET_FILE_RW_HINT:
-		h = file_write_hint(file);
-		if (copy_to_user(argp, &h, sizeof(*argp)))
-			return -EFAULT;
-		return 0;
-	case F_SET_FILE_RW_HINT:
-		if (copy_from_user(&h, argp, sizeof(h)))
-			return -EFAULT;
-		hint = (enum rw_hint) h;
-		if (!rw_hint_valid(hint))
-			return -EINVAL;
-
-		spin_lock(&file->f_lock);
-		file->f_write_hint = hint;
-		spin_unlock(&file->f_lock);
-		return 0;
 	case F_GET_RW_HINT:
 		h = inode->i_write_hint;
 		if (copy_to_user(argp, &h, sizeof(*argp)))
@@ -431,8 +415,6 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
 		break;
 	case F_GET_RW_HINT:
 	case F_SET_RW_HINT:
-	case F_GET_FILE_RW_HINT:
-	case F_SET_FILE_RW_HINT:
 		err = fcntl_rw_hint(filp, cmd, arg);
 		break;
 	default:
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 4ae1eefae616..6ba51cbb94cf 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -491,7 +491,6 @@ static struct bio *gfs2_chain_bio(struct bio *prev, unsigned int nr_iovecs)
 	new = bio_alloc(prev->bi_bdev, nr_iovecs, prev->bi_opf, GFP_NOIO);
 	bio_clone_blkg_association(new, prev);
 	new->bi_iter.bi_sector = bio_end_sector(prev);
-	new->bi_write_hint = prev->bi_write_hint;
 	bio_chain(new, prev);
 	submit_bio(prev);
 	return new;
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 496a2af7d12c..59e54a6854b7 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3941,7 +3941,6 @@ static int io_write_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 {
 	if (unlikely(!(req->file->f_mode & FMODE_WRITE)))
 		return -EBADF;
-	req->rw.kiocb.ki_hint = ki_hint_validate(file_write_hint(req->file));
 	return io_prep_rw(req, sqe);
 }
 
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index dffd2cac8113..d5fbd860c8cd 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1222,7 +1222,6 @@ iomap_alloc_ioend(struct inode *inode, struct iomap_writepage_ctx *wpc,
 			       REQ_OP_WRITE | wbc_to_write_flags(wbc),
 			       GFP_NOFS, &iomap_ioend_bioset);
 	bio->bi_iter.bi_sector = sector;
-	bio->bi_write_hint = inode->i_write_hint;
 	wbc_init_bio(wbc, bio);
 
 	ioend = container_of(bio, struct iomap_ioend, io_inline_bio);
@@ -1253,7 +1252,6 @@ iomap_chain_bio(struct bio *prev)
 	new = bio_alloc(prev->bi_bdev, BIO_MAX_VECS, prev->bi_opf, GFP_NOFS);
 	bio_clone_blkg_association(new, prev);
 	new->bi_iter.bi_sector = bio_end_sector(prev);
-	new->bi_write_hint = prev->bi_write_hint;
 
 	bio_chain(prev, new);
 	bio_get(prev);		/* for iomap_finish_ioend */
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index 67cf9c16f80c..b08f5dc31780 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -315,7 +315,6 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter,
 		fscrypt_set_bio_crypt_ctx(bio, inode, pos >> inode->i_blkbits,
 					  GFP_KERNEL);
 		bio->bi_iter.bi_sector = iomap_sector(iomap, pos);
-		bio->bi_write_hint = dio->iocb->ki_hint;
 		bio->bi_ioprio = dio->iocb->ki_ioprio;
 		bio->bi_private = dio;
 		bio->bi_end_io = iomap_dio_bio_end_io;
diff --git a/fs/mpage.c b/fs/mpage.c
index 9ed1e58e8d70..3e18c6e82e60 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -588,7 +588,6 @@ alloc_new:
 				GFP_NOFS);
 		bio->bi_iter.bi_sector = blocks[0] << (blkbits - 9);
 		wbc_init_bio(wbc, bio);
-		bio->bi_write_hint = inode->i_write_hint;
 	}
 
 	/*
diff --git a/fs/open.c b/fs/open.c
index 9ff2f621b760..1315253e0247 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -835,7 +835,6 @@ static int do_dentry_open(struct file *f,
 	     likely(f->f_op->write || f->f_op->write_iter))
 		f->f_mode |= FMODE_CAN_WRITE;
 
-	f->f_write_hint = WRITE_LIFE_NOT_SET;
 	f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC);
 
 	file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping);
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index 804b6e265685..3614c7834007 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -695,7 +695,6 @@ static ssize_t zonefs_file_dio_append(struct kiocb *iocb, struct iov_iter *from)
 	bio = bio_alloc(bdev, nr_pages,
 			REQ_OP_ZONE_APPEND | REQ_SYNC | REQ_IDLE, GFP_NOFS);
 	bio->bi_iter.bi_sector = zi->i_zsector;
-	bio->bi_write_hint = iocb->ki_hint;
 	bio->bi_ioprio = iocb->ki_ioprio;
 	if (iocb->ki_flags & IOCB_DSYNC)
 		bio->bi_opf |= REQ_FUA;
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 0c85f75f2fc5..dd0763a1c674 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -250,7 +250,6 @@ struct bio {
 						 */
 	unsigned short		bi_flags;	/* BIO_* below */
 	unsigned short		bi_ioprio;
-	unsigned short		bi_write_hint;
 	blk_status_t		bi_status;
 	atomic_t		__bi_remaining;
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index fe2b2b2dfc5b..60d016138997 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -517,9 +517,6 @@ struct request_queue {
 
 	bool			mq_sysfs_init_done;
 
-#define BLK_MAX_WRITE_HINTS	5
-	u64			write_hints[BLK_MAX_WRITE_HINTS];
-
 	/*
 	 * Independent sector access ranges. This is always NULL for
 	 * devices that do not have multiple independent access ranges.
diff --git a/include/linux/fs.h b/include/linux/fs.h
index da3fc3cd2428..183160872133 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -328,7 +328,6 @@ struct kiocb {
 	void (*ki_complete)(struct kiocb *iocb, long ret);
 	void			*private;
 	int			ki_flags;
-	u16			ki_hint;
 	u16			ki_ioprio; /* See linux/ioprio.h */
 	struct wait_page_queue	*ki_waitq; /* for async buffered IO */
 	randomized_struct_fields_end
@@ -973,7 +972,6 @@ struct file {
 	 * Must not be taken from IRQ context.
 	 */
 	spinlock_t		f_lock;
-	enum rw_hint		f_write_hint;
 	atomic_long_t		f_count;
 	unsigned int 		f_flags;
 	fmode_t			f_mode;
@@ -2222,31 +2220,13 @@ static inline bool HAS_UNMAPPED_ID(struct user_namespace *mnt_userns,
 	       !gid_valid(i_gid_into_mnt(mnt_userns, inode));
 }
 
-static inline enum rw_hint file_write_hint(struct file *file)
-{
-	if (file->f_write_hint != WRITE_LIFE_NOT_SET)
-		return file->f_write_hint;
-
-	return file_inode(file)->i_write_hint;
-}
-
 static inline int iocb_flags(struct file *file);
 
-static inline u16 ki_hint_validate(enum rw_hint hint)
-{
-	typeof(((struct kiocb *)0)->ki_hint) max_hint = -1;
-
-	if (hint <= max_hint)
-		return hint;
-	return 0;
-}
-
 static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
 {
 	*kiocb = (struct kiocb) {
 		.ki_filp = filp,
 		.ki_flags = iocb_flags(filp),
-		.ki_hint = ki_hint_validate(file_write_hint(filp)),
 		.ki_ioprio = get_current_ioprio(),
 	};
 }
@@ -2257,7 +2237,6 @@ static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src,
 	*kiocb = (struct kiocb) {
 		.ki_filp = filp,
 		.ki_flags = kiocb_src->ki_flags,
-		.ki_hint = kiocb_src->ki_hint,
 		.ki_ioprio = kiocb_src->ki_ioprio,
 		.ki_pos = kiocb_src->ki_pos,
 	};
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index f701bb23f83c..1779e133cea0 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -956,12 +956,11 @@ TRACE_EVENT(f2fs_direct_IO_enter,
 		__entry->rw	= rw;
 	),
 
-	TP_printk("dev = (%d,%d), ino = %lu pos = %lld len = %lu ki_flags = %x ki_hint = %x ki_ioprio = %x rw = %d",
+	TP_printk("dev = (%d,%d), ino = %lu pos = %lld len = %lu ki_flags = %x ki_ioprio = %x rw = %d",
 		show_dev_ino(__entry),
 		__entry->iocb->ki_pos,
 		__entry->len,
 		__entry->iocb->ki_flags,
-		__entry->iocb->ki_hint,
 		__entry->iocb->ki_ioprio,
 		__entry->rw)
 );