untangle the block headers v2

untangle the block headers v2

[Christoph Hellwig]

Hi Jens,

this series untangles the worst of the block header maze.  It removes
various includes from blkdev.h and genhd.h, and also ensures the
writeback code doesn't pull in blkdev.h leading to huge rebuilds
whenever they change.  Finally it moves various bits out of blkdev.h
which shouldn't be in the general block layer header.

It has surived various randomconfig builds from me and the buildbot,
but I suspect there are a few more conditionally missing headers
that will emerge later for more oscure configs, so it would be great
to get this merged early.

Changes since v1:
 - a few spelling fixes
 - add a bunch more includes needed for a arc randomconfig

Diffstat:
 arch/mips/rb532/prom.c                     |    1 
 arch/mips/sibyte/common/cfe.c              |    1 
 arch/mips/sibyte/swarm/setup.c             |    1 
 arch/openrisc/mm/init.c                    |    1 
 arch/powerpc/platforms/cell/spufs/inode.c  |    1 
 arch/um/drivers/ubd_kern.c                 |    1 
 block/bdev.c                               |    1 
 block/bfq-cgroup.c                         |    2 
 block/bfq-iosched.c                        |    2 
 block/bio-integrity.c                      |    2 
 block/blk-core.c                           |    1 
 block/blk-crypto-fallback.c                |    1 
 block/blk-crypto-internal.h                |    2 
 block/blk-integrity.c                      |    2 
 block/blk-iolatency.c                      |    1 
 block/blk-merge.c                          |   25 
 block/blk-mq-sched.h                       |    1 
 block/blk-mq-tag.h                         |    2 
 block/blk-mq.c                             |    2 
 block/blk.h                                |   40 +
 block/bounce.c                             |    1 
 block/elevator.c                           |    2 
 block/elevator.h                           |   21 
 block/genhd.c                              |    1 
 block/holder.c                             |    1 
 block/keyslot-manager.c                    |    1 
 block/kyber-iosched.c                      |    2 
 block/mq-deadline.c                        |    2 
 block/partitions/core.c                    |    1 
 block/t10-pi.c                             |    2 
 drivers/block/amiflop.c                    |    2 
 drivers/block/ataflop.c                    |    1 
 drivers/block/floppy.c                     |    1 
 drivers/block/rnbd/rnbd-proto.h            |    2 
 drivers/block/swim.c                       |    1 
 drivers/block/xen-blkfront.c               |    1 
 drivers/gpu/drm/i915/i915_utils.h          |    1 
 drivers/md/dm-bio-record.h                 |    1 
 drivers/md/dm-crypt.c                      |    1 
 drivers/md/dm-ima.c                        |    1 
 drivers/md/dm-ps-historical-service-time.c |    1 
 drivers/md/dm-rq.c                         |    1 
 drivers/md/dm-table.c                      |    1 
 drivers/md/dm-verity-target.c              |    1 
 drivers/md/md.c                            |    2 
 drivers/mmc/core/sd.c                      |    1 
 drivers/mtd/mtdsuper.c                     |    1 
 drivers/nvdimm/core.c                      |    1 
 drivers/nvme/host/core.c                   |    1 
 drivers/nvme/host/pci.c                    |    1 
 drivers/nvme/host/rdma.c                   |    1 
 drivers/nvme/target/io-cmd-bdev.c          |    1 
 drivers/nvme/target/rdma.c                 |    1 
 drivers/s390/block/dasd_genhd.c            |    1 
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c     |    1 
 drivers/scsi/lpfc/lpfc.h                   |    1 
 drivers/scsi/scsi_lib.c                    |    1 
 drivers/scsi/sd.c                          |    1 
 drivers/scsi/sd_dif.c                      |    2 
 drivers/scsi/sg.c                          |    1 
 drivers/scsi/sr.c                          |    1 
 drivers/scsi/st.c                          |    1 
 drivers/scsi/virtio_scsi.c                 |    1 
 drivers/target/target_core_file.c          |    1 
 drivers/target/target_core_iblock.c        |    2 
 fs/btrfs/compression.c                     |    1 
 fs/btrfs/ctree.c                           |    1 
 fs/btrfs/inode.c                           |    1 
 fs/f2fs/compress.c                         |    1 
 fs/ntfs/file.c                             |    1 
 fs/ntfs3/file.c                            |    1 
 fs/orangefs/inode.c                        |    2 
 fs/orangefs/super.c                        |    1 
 fs/quota/quota.c                           |    1 
 fs/ramfs/inode.c                           |    1 
 include/linux/backing-dev.h                |   19 
 include/linux/blk-integrity.h              |  183 +++++++
 include/linux/blk-mq.h                     |  465 ++++++++++++++++++
 include/linux/blk_types.h                  |    2 
 include/linux/blkdev.h                     |  743 -----------------------------
 include/linux/blktrace_api.h               |    2 
 include/linux/genhd.h                      |   14 
 include/linux/part_stat.h                  |    1 
 include/linux/t10-pi.h                     |    2 
 include/linux/writeback.h                  |   14 
 include/scsi/scsi_device.h                 |    2 
 init/main.c                                |    1 
 kernel/acct.c                              |    1 
 kernel/exit.c                              |    1 
 kernel/fork.c                              |    1 
 kernel/sched/core.c                        |    2 
 kernel/sched/sched.h                       |    1 
 lib/random32.c                             |    1 
 mm/backing-dev.c                           |   19 
 mm/filemap.c                               |    1 
 mm/highmem.c                               |    1 
 mm/mempool.c                               |    1 
 mm/nommu.c                                 |    1 
 mm/readahead.c                             |    1 
 mm/shmem.c                                 |    1 
 mm/swapfile.c                              |    2 
 101 files changed, 832 insertions(+), 825 deletions(-)

[PATCH 01/17] mm: don't include <linux/blk-cgroup.h> in <linux/writeback.h>

[Christoph Hellwig]

blk-cgroup.h pulls in blkdev.h and thus pretty much all the block
headers.  Break this dependency chain by turning wbc_blkcg_css into a
macro and dropping the blk-cgroup.h include.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/gpu/drm/i915/i915_utils.h |  1 +
 fs/btrfs/inode.c                  |  1 +
 fs/quota/quota.c                  |  1 +
 include/linux/writeback.h         | 14 +++++---------
 lib/random32.c                    |  1 +
 5 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h
index 5259edacde380..066a9118c3748 100644
--- a/drivers/gpu/drm/i915/i915_utils.h
+++ b/drivers/gpu/drm/i915/i915_utils.h
@@ -30,6 +30,7 @@
 #include <linux/sched.h>
 #include <linux/types.h>
 #include <linux/workqueue.h>
+#include <linux/sched/clock.h>
 
 struct drm_i915_private;
 struct timer_list;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 487533c35ddb6..4a9077c524448 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6,6 +6,7 @@
 #include <crypto/hash.h>
 #include <linux/kernel.h>
 #include <linux/bio.h>
+#include <linux/blk-cgroup.h>
 #include <linux/file.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index 2bcc9a6f1bfc0..052f143e2e0e1 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -10,6 +10,7 @@
 #include <linux/namei.h>
 #include <linux/slab.h>
 #include <asm/current.h>
+#include <linux/blkdev.h>
 #include <linux/uaccess.h>
 #include <linux/kernel.h>
 #include <linux/security.h>
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index d1f65adf6a266..8eb165760752b 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -11,7 +11,6 @@
 #include <linux/flex_proportions.h>
 #include <linux/backing-dev-defs.h>
 #include <linux/blk_types.h>
-#include <linux/blk-cgroup.h>
 
 struct bio;
 
@@ -109,15 +108,12 @@ static inline int wbc_to_write_flags(struct writeback_control *wbc)
 	return flags;
 }
 
-static inline struct cgroup_subsys_state *
-wbc_blkcg_css(struct writeback_control *wbc)
-{
 #ifdef CONFIG_CGROUP_WRITEBACK
-	if (wbc->wb)
-		return wbc->wb->blkcg_css;
-#endif
-	return blkcg_root_css;
-}
+#define wbc_blkcg_css(wbc) \
+	((wbc)->wb ? (wbc)->wb->blkcg_css : blkcg_root_css)
+#else
+#define wbc_blkcg_css(wbc)		(blkcg_root_css)
+#endif /* CONFIG_CGROUP_WRITEBACK */
 
 /*
  * A wb_domain represents a domain that wb's (bdi_writeback's) belong to
diff --git a/lib/random32.c b/lib/random32.c
index 4d0e05e471d72..a57a0e18819d0 100644
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -39,6 +39,7 @@
 #include <linux/random.h>
 #include <linux/sched.h>
 #include <linux/bitops.h>
+#include <linux/slab.h>
 #include <asm/unaligned.h>
 #include <trace/events/random.h>
 
-- 
2.30.2

[PATCH 02/17] mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h>

[Christoph Hellwig]

There is no need to pull blk-cgroup.h and thus blkdev.h in here, so
break the include chain.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 arch/powerpc/platforms/cell/spufs/inode.c | 1 +
 block/blk-iolatency.c                     | 1 +
 block/blk-mq.c                            | 1 +
 block/bounce.c                            | 1 +
 drivers/md/dm-ima.c                       | 1 +
 fs/btrfs/compression.c                    | 1 +
 fs/btrfs/ctree.c                          | 1 +
 fs/f2fs/compress.c                        | 1 +
 fs/orangefs/super.c                       | 1 +
 fs/ramfs/inode.c                          | 1 +
 include/linux/backing-dev.h               | 3 ++-
 mm/backing-dev.c                          | 3 ++-
 mm/swapfile.c                             | 2 +-
 13 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index bed05b644c2c5..cb25acccd746e 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -21,6 +21,7 @@
 #include <linux/namei.h>
 #include <linux/pagemap.h>
 #include <linux/poll.h>
+#include <linux/seq_file.h>
 #include <linux/slab.h>
 
 #include <asm/prom.h>
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index c0545f9da549c..6593c7123b97e 100644
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -74,6 +74,7 @@
 #include <linux/sched/signal.h>
 #include <trace/events/block.h>
 #include <linux/blk-mq.h>
+#include <linux/blk-cgroup.h>
 #include "blk-rq-qos.h"
 #include "blk-stat.h"
 #include "blk.h"
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 108a352051be5..61264bff6103a 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -16,6 +16,7 @@
 #include <linux/slab.h>
 #include <linux/workqueue.h>
 #include <linux/smp.h>
+#include <linux/interrupt.h>
 #include <linux/llist.h>
 #include <linux/list_sort.h>
 #include <linux/cpu.h>
diff --git a/block/bounce.c b/block/bounce.c
index 05fc7148489d7..7af1a72835b99 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -14,6 +14,7 @@
 #include <linux/pagemap.h>
 #include <linux/mempool.h>
 #include <linux/blkdev.h>
+#include <linux/blk-cgroup.h>
 #include <linux/backing-dev.h>
 #include <linux/init.h>
 #include <linux/hash.h>
diff --git a/drivers/md/dm-ima.c b/drivers/md/dm-ima.c
index 2c5edfbd77117..957999998d703 100644
--- a/drivers/md/dm-ima.c
+++ b/drivers/md/dm-ima.c
@@ -12,6 +12,7 @@
 #include "dm-ima.h"
 
 #include <linux/ima.h>
+#include <linux/sched/mm.h>
 #include <crypto/hash.h>
 #include <linux/crypto.h>
 #include <crypto/hash_info.h>
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 7869ad12bc6e1..ddc4f5436cc91 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -9,6 +9,7 @@
 #include <linux/fs.h>
 #include <linux/pagemap.h>
 #include <linux/highmem.h>
+#include <linux/kthread.h>
 #include <linux/time.h>
 #include <linux/init.h>
 #include <linux/string.h>
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 84627cbd5b5b5..66290b214f2bc 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -7,6 +7,7 @@
 #include <linux/slab.h>
 #include <linux/rbtree.h>
 #include <linux/mm.h>
+#include <linux/error-injection.h>
 #include "ctree.h"
 #include "disk-io.h"
 #include "transaction.h"
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index c1bf9ad4c2207..20a083dc90423 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -7,6 +7,7 @@
 
 #include <linux/fs.h>
 #include <linux/f2fs_fs.h>
+#include <linux/moduleparam.h>
 #include <linux/writeback.h>
 #include <linux/backing-dev.h>
 #include <linux/lzo.h>
diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c
index 2f2e430461b21..8bb0a53a658b0 100644
--- a/fs/orangefs/super.c
+++ b/fs/orangefs/super.c
@@ -11,6 +11,7 @@
 
 #include <linux/parser.h>
 #include <linux/hashtable.h>
+#include <linux/seq_file.h>
 
 /* a cache for orangefs-inode objects (i.e. orangefs inode private data) */
 static struct kmem_cache *orangefs_inode_cache;
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index 65e7e56005b8f..e2302342a67f4 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -38,6 +38,7 @@
 #include <linux/uaccess.h>
 #include <linux/fs_context.h>
 #include <linux/fs_parser.h>
+#include <linux/seq_file.h>
 #include "internal.h"
 
 struct ramfs_mount_opts {
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index ac7f231b88258..843bf4be675f3 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -15,10 +15,11 @@
 #include <linux/blkdev.h>
 #include <linux/device.h>
 #include <linux/writeback.h>
-#include <linux/blk-cgroup.h>
 #include <linux/backing-dev-defs.h>
 #include <linux/slab.h>
 
+struct blkcg;
+
 static inline struct backing_dev_info *bdi_get(struct backing_dev_info *bdi)
 {
 	kref_get(&bdi->refcnt);
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 4a9d4e27d0d9b..5245744437dc9 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -2,8 +2,9 @@
 
 #include <linux/wait.h>
 #include <linux/rbtree.h>
-#include <linux/backing-dev.h>
 #include <linux/kthread.h>
+#include <linux/backing-dev.h>
+#include <linux/blk-cgroup.h>
 #include <linux/freezer.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 22d10f7138487..30db362749c06 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -18,7 +18,7 @@
 #include <linux/pagemap.h>
 #include <linux/namei.h>
 #include <linux/shmem_fs.h>
-#include <linux/blkdev.h>
+#include <linux/blk-cgroup.h>
 #include <linux/random.h>
 #include <linux/writeback.h>
 #include <linux/proc_fs.h>
-- 
2.30.2

[PATCH 03/17] mm: don't include <linux/blkdev.h> in <linux/backing-dev.h>

[Christoph Hellwig]

Move inode_to_bdi out of line to avoid having to include blkdev.h.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/mtd/mtdsuper.c      |  1 +
 fs/ntfs/file.c              |  1 +
 fs/ntfs3/file.c             |  1 +
 fs/orangefs/inode.c         |  2 +-
 include/linux/backing-dev.h | 16 +---------------
 mm/backing-dev.c            | 16 ++++++++++++++++
 6 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index 38b6aa849c638..5ff001140ef4a 100644
--- a/drivers/mtd/mtdsuper.c
+++ b/drivers/mtd/mtdsuper.c
@@ -15,6 +15,7 @@
 #include <linux/slab.h>
 #include <linux/major.h>
 #include <linux/backing-dev.h>
+#include <linux/blkdev.h>
 #include <linux/fs_context.h>
 #include "mtdcore.h"
 
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index ab4f3362466d0..373dbb6276570 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -5,6 +5,7 @@
  * Copyright (c) 2001-2015 Anton Altaparmakov and Tuxera Inc.
  */
 
+#include <linux/blkdev.h>
 #include <linux/backing-dev.h>
 #include <linux/buffer_head.h>
 #include <linux/gfp.h>
diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 424450e77ad52..7592ba8944572 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/backing-dev.h>
+#include <linux/blkdev.h>
 #include <linux/buffer_head.h>
 #include <linux/compat.h>
 #include <linux/falloc.h>
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
index c1bb4c4b5d672..e5e3e500ed462 100644
--- a/fs/orangefs/inode.c
+++ b/fs/orangefs/inode.c
@@ -10,7 +10,7 @@
  *  Linux VFS inode operations.
  */
 
-#include <linux/bvec.h>
+#include <linux/blkdev.h>
 #include <linux/fileattr.h>
 #include "protocol.h"
 #include "orangefs-kernel.h"
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 843bf4be675f3..4ac7ce0960139 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -12,7 +12,6 @@
 #include <linux/kernel.h>
 #include <linux/fs.h>
 #include <linux/sched.h>
-#include <linux/blkdev.h>
 #include <linux/device.h>
 #include <linux/writeback.h>
 #include <linux/backing-dev-defs.h>
@@ -134,20 +133,7 @@ static inline bool writeback_in_progress(struct bdi_writeback *wb)
 	return test_bit(WB_writeback_running, &wb->state);
 }
 
-static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
-{
-	struct super_block *sb;
-
-	if (!inode)
-		return &noop_backing_dev_info;
-
-	sb = inode->i_sb;
-#ifdef CONFIG_BLOCK
-	if (sb_is_blkdev_sb(sb))
-		return I_BDEV(inode)->bd_disk->bdi;
-#endif
-	return sb->s_bdi;
-}
+struct backing_dev_info *inode_to_bdi(struct inode *inode);
 
 static inline int wb_congested(struct bdi_writeback *wb, int cong_bits)
 {
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 5245744437dc9..c878d995af06e 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -978,6 +978,22 @@ void bdi_put(struct backing_dev_info *bdi)
 }
 EXPORT_SYMBOL(bdi_put);
 
+struct backing_dev_info *inode_to_bdi(struct inode *inode)
+{
+	struct super_block *sb;
+
+	if (!inode)
+		return &noop_backing_dev_info;
+
+	sb = inode->i_sb;
+#ifdef CONFIG_BLOCK
+	if (sb_is_blkdev_sb(sb))
+		return I_BDEV(inode)->bd_disk->bdi;
+#endif
+	return sb->s_bdi;
+}
+EXPORT_SYMBOL(inode_to_bdi);
+
 const char *bdi_dev_name(struct backing_dev_info *bdi)
 {
 	if (!bdi || !bdi->dev)
-- 
2.30.2

[PATCH 04/17] mm: remove spurious blkdev.h includes

[Christoph Hellwig]

Various files have acquired spurious includes of <linux/blkdev.h> over
time.  Remove them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 mm/filemap.c   | 1 -
 mm/highmem.c   | 1 -
 mm/mempool.c   | 1 -
 mm/nommu.c     | 1 -
 mm/readahead.c | 1 -
 mm/shmem.c     | 1 -
 6 files changed, 6 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index dae481293b5d9..44b4b551e430f 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -30,7 +30,6 @@
 #include <linux/writeback.h>
 #include <linux/backing-dev.h>
 #include <linux/pagevec.h>
-#include <linux/blkdev.h>
 #include <linux/security.h>
 #include <linux/cpuset.h>
 #include <linux/hugetlb.h>
diff --git a/mm/highmem.c b/mm/highmem.c
index 4212ad0e4a195..471d9779a7f47 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -23,7 +23,6 @@
 #include <linux/bio.h>
 #include <linux/pagemap.h>
 #include <linux/mempool.h>
-#include <linux/blkdev.h>
 #include <linux/init.h>
 #include <linux/hash.h>
 #include <linux/highmem.h>
diff --git a/mm/mempool.c b/mm/mempool.c
index 0b8afbec3e358..b933d0fc21b8b 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -17,7 +17,6 @@
 #include <linux/kmemleak.h>
 #include <linux/export.h>
 #include <linux/mempool.h>
-#include <linux/blkdev.h>
 #include <linux/writeback.h>
 #include "slab.h"
 
diff --git a/mm/nommu.c b/mm/nommu.c
index 02d2427b8f9e8..41ef204e74820 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -27,7 +27,6 @@
 #include <linux/pagemap.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
-#include <linux/blkdev.h>
 #include <linux/backing-dev.h>
 #include <linux/compiler.h>
 #include <linux/mount.h>
diff --git a/mm/readahead.c b/mm/readahead.c
index 41b75d76d36e1..e71e719e36c90 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -12,7 +12,6 @@
 #include <linux/dax.h>
 #include <linux/gfp.h>
 #include <linux/export.h>
-#include <linux/blkdev.h>
 #include <linux/backing-dev.h>
 #include <linux/task_io_accounting_ops.h>
 #include <linux/pagevec.h>
diff --git a/mm/shmem.c b/mm/shmem.c
index 88742953532cc..b9d22ab32a770 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -59,7 +59,6 @@ static struct vfsmount *shm_mnt;
 #include <linux/backing-dev.h>
 #include <linux/shmem_fs.h>
 #include <linux/writeback.h>
-#include <linux/blkdev.h>
 #include <linux/pagevec.h>
 #include <linux/percpu_counter.h>
 #include <linux/falloc.h>
-- 
2.30.2

[PATCH 05/17] arch: remove spurious blkdev.h includes

[Christoph Hellwig]

Various files have acquired spurious includes of <linux/blkdev.h> over
time.  Remove them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/mips/rb532/prom.c         | 1 -
 arch/mips/sibyte/common/cfe.c  | 1 -
 arch/mips/sibyte/swarm/setup.c | 1 -
 arch/openrisc/mm/init.c        | 1 -
 4 files changed, 4 deletions(-)

diff --git a/arch/mips/rb532/prom.c b/arch/mips/rb532/prom.c
index 23ad8dd9aa5e0..b116937155474 100644
--- a/arch/mips/rb532/prom.c
+++ b/arch/mips/rb532/prom.c
@@ -16,7 +16,6 @@
 #include <linux/console.h>
 #include <linux/memblock.h>
 #include <linux/ioport.h>
-#include <linux/blkdev.h>
 
 #include <asm/bootinfo.h>
 #include <asm/mach-rc32434/ddr.h>
diff --git a/arch/mips/sibyte/common/cfe.c b/arch/mips/sibyte/common/cfe.c
index a3323f8dcc1b8..1a504294d85f8 100644
--- a/arch/mips/sibyte/common/cfe.c
+++ b/arch/mips/sibyte/common/cfe.c
@@ -7,7 +7,6 @@
 #include <linux/kernel.h>
 #include <linux/linkage.h>
 #include <linux/mm.h>
-#include <linux/blkdev.h>
 #include <linux/memblock.h>
 #include <linux/pm.h>
 #include <linux/smp.h>
diff --git a/arch/mips/sibyte/swarm/setup.c b/arch/mips/sibyte/swarm/setup.c
index 538a2791b48ca..f07b15dd1c1a3 100644
--- a/arch/mips/sibyte/swarm/setup.c
+++ b/arch/mips/sibyte/swarm/setup.c
@@ -11,7 +11,6 @@
 #include <linux/spinlock.h>
 #include <linux/mm.h>
 #include <linux/memblock.h>
-#include <linux/blkdev.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/screen_info.h>
diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index cfef61a7b6c2a..97305bde1b169 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -25,7 +25,6 @@
 #include <linux/memblock.h>
 #include <linux/init.h>
 #include <linux/delay.h>
-#include <linux/blkdev.h>	/* for initrd_* */
 #include <linux/pagemap.h>
 
 #include <asm/pgalloc.h>
-- 
2.30.2

[PATCH 06/17] kernel: remove spurious blkdev.h includes

[Christoph Hellwig]

Various files have acquired spurious includes of <linux/blkdev.h> over
time.  Remove them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 kernel/acct.c | 1 -
 kernel/exit.c | 1 -
 kernel/fork.c | 1 -
 3 files changed, 3 deletions(-)

diff --git a/kernel/acct.c b/kernel/acct.c
index 23a7ab8e6cbc8..3df53cf1dcd5e 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -60,7 +60,6 @@
 #include <linux/sched/cputime.h>
 
 #include <asm/div64.h>
-#include <linux/blkdev.h> /* sector_div */
 #include <linux/pid_namespace.h>
 #include <linux/fs_pin.h>
 
diff --git a/kernel/exit.c b/kernel/exit.c
index 91a43e57a32eb..a53863dafb3d7 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -48,7 +48,6 @@
 #include <linux/pipe_fs_i.h>
 #include <linux/audit.h> /* for audit_free() */
 #include <linux/resource.h>
-#include <linux/blkdev.h>
 #include <linux/task_io_accounting_ops.h>
 #include <linux/tracehook.h>
 #include <linux/fs_struct.h>
diff --git a/kernel/fork.c b/kernel/fork.c
index 38681ad44c76b..67679e3933f2f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -76,7 +76,6 @@
 #include <linux/taskstats_kern.h>
 #include <linux/random.h>
 #include <linux/tty.h>
-#include <linux/blkdev.h>
 #include <linux/fs_struct.h>
 #include <linux/magic.h>
 #include <linux/perf_event.h>
-- 
2.30.2

[PATCH 07/17] sched: move the <linux/blkdev.h> include out of kernel/sched/sched.h

[Christoph Hellwig]

Only core.c needs blkdev.h, so move the #include statement there.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 kernel/sched/core.c  | 2 +-
 kernel/sched/sched.h | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 1bba4128a3e68..92ef7b68198c4 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -13,7 +13,7 @@
 #include "sched.h"
 
 #include <linux/nospec.h>
-
+#include <linux/blkdev.h>
 #include <linux/kcov.h>
 #include <linux/scs.h>
 
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 3d3e5793e1172..66128dfc05fb3 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -37,7 +37,6 @@
 
 #include <linux/binfmts.h>
 #include <linux/bitops.h>
-#include <linux/blkdev.h>
 #include <linux/compat.h>
 #include <linux/context_tracking.h>
 #include <linux/cpufreq.h>
-- 
2.30.2

[PATCH 08/17] block: remove the unused rq_end_sector macro

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/md/dm-rq.c       | 1 -
 include/linux/elevator.h | 1 -
 2 files changed, 2 deletions(-)

diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index 5b95eea517d1b..79974bb0d250f 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -7,7 +7,6 @@
 #include "dm-core.h"
 #include "dm-rq.h"
 
-#include <linux/elevator.h> /* for rq_end_sector() */
 #include <linux/blk-mq.h>
 
 #define DM_MSG_PREFIX "core-rq"
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index ef9ceead3db13..80633f3b600c2 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -162,7 +162,6 @@ extern struct request *elv_rb_find(struct rb_root *, sector_t);
 #define ELEVATOR_INSERT_FLUSH	5
 #define ELEVATOR_INSERT_SORT_MERGE	6
 
-#define rq_end_sector(rq)	(blk_rq_pos(rq) + blk_rq_sectors(rq))
 #define rb_entry_rq(node)	rb_entry((node), struct request, rb_node)
 
 #define rq_entry_fifo(ptr)	list_entry((ptr), struct request, queuelist)
-- 
2.30.2

[PATCH 09/17] block: remove the unused blk_queue_state enum

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/blkdev.h | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 12b9dbcc980ee..9e367509bea10 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -262,11 +262,6 @@ enum blk_eh_timer_return {
 	BLK_EH_RESET_TIMER,	/* reset timer and try again */
 };
 
-enum blk_queue_state {
-	Queue_down,
-	Queue_up,
-};
-
 #define BLK_TAG_ALLOC_FIFO 0 /* allocate starting from 0 */
 #define BLK_TAG_ALLOC_RR 1 /* allocate starting from last allocated tag */
 
-- 
2.30.2

[PATCH 10/17] block: remove the cmd_size field from struct request_queue

[Christoph Hellwig]

Entirely unused.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/blkdev.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 9e367509bea10..6737e484280d3 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -544,8 +544,6 @@ struct request_queue {
 
 	bool			mq_sysfs_init_done;
 
-	size_t			cmd_size;
-
 #define BLK_MAX_WRITE_HINTS	5
 	u64			write_hints[BLK_MAX_WRITE_HINTS];
 };
-- 
2.30.2

[PATCH 11/17] block: remove the struct blk_queue_ctx forward declaration

[Christoph Hellwig]

This type doesn't exist at all, so no need to forward declare it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/blkdev.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 6737e484280d3..4bcbb1ae2d66a 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -253,8 +253,6 @@ static inline unsigned short req_get_ioprio(struct request *req)
 
 #include <linux/elevator.h>
 
-struct blk_queue_ctx;
-
 struct bio_vec;
 
 enum blk_eh_timer_return {
-- 
2.30.2

[PATCH 12/17] block: move elevator.h to block/

[Christoph Hellwig]

Except for the features passed to blk_queue_required_elevator_features,
elevator.h is only needed internally to the block layer.  Move the
ELEVATOR_F_* definitions to blkdev.h, and the move elevator.h to
block/, dropping all the spurious includes outside of that.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/bfq-cgroup.c                  |  2 +-
 block/bfq-iosched.c                 |  2 +-
 block/blk-mq-sched.h                |  1 +
 block/blk-mq-tag.h                  |  2 ++
 block/blk.h                         |  2 ++
 block/elevator.c                    |  2 +-
 {include/linux => block}/elevator.h | 20 +++-----------------
 block/kyber-iosched.c               |  2 +-
 block/mq-deadline.c                 |  2 +-
 drivers/block/amiflop.c             |  1 -
 drivers/scsi/lpfc/lpfc.h            |  1 +
 include/linux/blkdev.h              | 11 +++++++++--
 init/main.c                         |  1 -
 13 files changed, 23 insertions(+), 26 deletions(-)
 rename {include/linux => block}/elevator.h (93%)

diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c
index e2f14508f2d6e..8826daedd61c1 100644
--- a/block/bfq-cgroup.c
+++ b/block/bfq-cgroup.c
@@ -6,13 +6,13 @@
 #include <linux/slab.h>
 #include <linux/blkdev.h>
 #include <linux/cgroup.h>
-#include <linux/elevator.h>
 #include <linux/ktime.h>
 #include <linux/rbtree.h>
 #include <linux/ioprio.h>
 #include <linux/sbitmap.h>
 #include <linux/delay.h>
 
+#include "elevator.h"
 #include "bfq-iosched.h"
 
 #ifdef CONFIG_BFQ_CGROUP_DEBUG
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index dd13c2bbc29c1..f045ac8f07adf 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -117,7 +117,6 @@
 #include <linux/slab.h>
 #include <linux/blkdev.h>
 #include <linux/cgroup.h>
-#include <linux/elevator.h>
 #include <linux/ktime.h>
 #include <linux/rbtree.h>
 #include <linux/ioprio.h>
@@ -127,6 +126,7 @@
 
 #include <trace/events/block.h>
 
+#include "elevator.h"
 #include "blk.h"
 #include "blk-mq.h"
 #include "blk-mq-tag.h"
diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h
index 5246ae0407047..5181487db7923 100644
--- a/block/blk-mq-sched.h
+++ b/block/blk-mq-sched.h
@@ -2,6 +2,7 @@
 #ifndef BLK_MQ_SCHED_H
 #define BLK_MQ_SCHED_H
 
+#include "elevator.h"
 #include "blk-mq.h"
 #include "blk-mq-tag.h"
 
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index 8ed55af084273..f0a0ee758a556 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -2,6 +2,8 @@
 #ifndef INT_BLK_MQ_TAG_H
 #define INT_BLK_MQ_TAG_H
 
+struct blk_mq_alloc_data;
+
 /*
  * Tag address space map.
  */
diff --git a/block/blk.h b/block/blk.h
index 7d2a0ba7ed21d..82ab26add08df 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -12,6 +12,8 @@
 #include "blk-mq.h"
 #include "blk-mq-sched.h"
 
+struct elevator_type;
+
 /* Max future timer expiry for timeouts */
 #define BLK_MAX_TIMEOUT		(5 * HZ)
 
diff --git a/block/elevator.c b/block/elevator.c
index ff45d8388f487..57be09cd7f6dd 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -26,7 +26,6 @@
 #include <linux/kernel.h>
 #include <linux/fs.h>
 #include <linux/blkdev.h>
-#include <linux/elevator.h>
 #include <linux/bio.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -40,6 +39,7 @@
 
 #include <trace/events/block.h>
 
+#include "elevator.h"
 #include "blk.h"
 #include "blk-mq-sched.h"
 #include "blk-pm.h"
diff --git a/include/linux/elevator.h b/block/elevator.h
similarity index 93%
rename from include/linux/elevator.h
rename to block/elevator.h
index 80633f3b600c2..16cd8bdedb7ea 100644
--- a/include/linux/elevator.h
+++ b/block/elevator.h
@@ -1,17 +1,13 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LINUX_ELEVATOR_H
-#define _LINUX_ELEVATOR_H
+#ifndef _ELEVATOR_H
+#define _ELEVATOR_H
 
 #include <linux/percpu.h>
 #include <linux/hashtable.h>
 
-#ifdef CONFIG_BLOCK
-
 struct io_cq;
 struct elevator_type;
-#ifdef CONFIG_BLK_DEBUG_FS
 struct blk_mq_debugfs_attr;
-#endif
 
 /*
  * Return values from elevator merger
@@ -167,14 +163,4 @@ extern struct request *elv_rb_find(struct rb_root *, sector_t);
 #define rq_entry_fifo(ptr)	list_entry((ptr), struct request, queuelist)
 #define rq_fifo_clear(rq)	list_del_init(&(rq)->queuelist)
 
-/*
- * Elevator features.
- */
-
-/* Supports zoned block devices sequential write constraint */
-#define ELEVATOR_F_ZBD_SEQ_WRITE	(1U << 0)
-/* Supports scheduling on multiple hardware queues */
-#define ELEVATOR_F_MQ_AWARE		(1U << 1)
-
-#endif /* CONFIG_BLOCK */
-#endif
+#endif /* _ELEVATOR_H */
diff --git a/block/kyber-iosched.c b/block/kyber-iosched.c
index 15a8be57203d6..5808f0ea0b79f 100644
--- a/block/kyber-iosched.c
+++ b/block/kyber-iosched.c
@@ -9,12 +9,12 @@
 #include <linux/kernel.h>
 #include <linux/blkdev.h>
 #include <linux/blk-mq.h>
-#include <linux/elevator.h>
 #include <linux/module.h>
 #include <linux/sbitmap.h>
 
 #include <trace/events/block.h>
 
+#include "elevator.h"
 #include "blk.h"
 #include "blk-mq.h"
 #include "blk-mq-debugfs.h"
diff --git a/block/mq-deadline.c b/block/mq-deadline.c
index 7f3c3932b723e..47f042fa6a688 100644
--- a/block/mq-deadline.c
+++ b/block/mq-deadline.c
@@ -9,7 +9,6 @@
 #include <linux/fs.h>
 #include <linux/blkdev.h>
 #include <linux/blk-mq.h>
-#include <linux/elevator.h>
 #include <linux/bio.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -20,6 +19,7 @@
 
 #include <trace/events/block.h>
 
+#include "elevator.h"
 #include "blk.h"
 #include "blk-mq.h"
 #include "blk-mq-debugfs.h"
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 8b1714021498c..b892e5185d6fa 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -64,7 +64,6 @@
 #include <linux/mutex.h>
 #include <linux/fs.h>
 #include <linux/blk-mq.h>
-#include <linux/elevator.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 
diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index befeb7c342903..337e6ed248218 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -22,6 +22,7 @@
  *******************************************************************/
 
 #include <scsi/scsi_host.h>
+#include <linux/hashtable.h>
 #include <linux/ktime.h>
 #include <linux/workqueue.h>
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4bcbb1ae2d66a..d815238f61ed9 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -251,8 +251,6 @@ static inline unsigned short req_get_ioprio(struct request *req)
 	return req->ioprio;
 }
 
-#include <linux/elevator.h>
-
 struct bio_vec;
 
 enum blk_eh_timer_return {
@@ -1124,6 +1122,15 @@ extern void blk_queue_dma_alignment(struct request_queue *, int);
 extern void blk_queue_update_dma_alignment(struct request_queue *, int);
 extern void blk_queue_rq_timeout(struct request_queue *, unsigned int);
 extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua);
+
+/*
+ * Elevator features for blk_queue_required_elevator_features:
+ */
+/* Supports zoned block devices sequential write constraint */
+#define ELEVATOR_F_ZBD_SEQ_WRITE	(1U << 0)
+/* Supports scheduling on multiple hardware queues */
+#define ELEVATOR_F_MQ_AWARE		(1U << 1)
+
 extern void blk_queue_required_elevator_features(struct request_queue *q,
 						 unsigned int features);
 extern bool blk_queue_can_use_dma_map_merging(struct request_queue *q,
diff --git a/init/main.c b/init/main.c
index 3f72169344412..330aae01e728c 100644
--- a/init/main.c
+++ b/init/main.c
@@ -83,7 +83,6 @@
 #include <linux/ptrace.h>
 #include <linux/pti.h>
 #include <linux/blkdev.h>
-#include <linux/elevator.h>
 #include <linux/sched/clock.h>
 #include <linux/sched/task.h>
 #include <linux/sched/task_stack.h>
-- 
2.30.2

[PATCH 13/17] block: drop unused includes in <linux/blkdev.h>

[Christoph Hellwig]

Drop various include not actually used in blkdev.h itself.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/md/dm-ps-historical-service-time.c | 1 +
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c     | 1 +
 include/linux/blkdev.h                     | 7 -------
 3 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/md/dm-ps-historical-service-time.c b/drivers/md/dm-ps-historical-service-time.c
index 1856a1b125cc1..875bca30a0dd5 100644
--- a/drivers/md/dm-ps-historical-service-time.c
+++ b/drivers/md/dm-ps-historical-service-time.c
@@ -27,6 +27,7 @@
 #include <linux/blkdev.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/sched/clock.h>
 
 
 #define DM_MSG_PREFIX	"multipath historical-service-time"
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 3ab669dc806f6..27884f3106ab8 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2017 Hisilicon Limited.
  */
 
+#include <linux/sched/clock.h>
 #include "hisi_sas.h"
 #define DRV_NAME "hisi_sas_v3_hw"
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index d815238f61ed9..46a703394f7f4 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -3,8 +3,6 @@
 #define _LINUX_BLKDEV_H
 
 #include <linux/sched.h>
-#include <linux/sched/clock.h>
-#include <linux/major.h>
 #include <linux/genhd.h>
 #include <linux/list.h>
 #include <linux/llist.h>
@@ -12,17 +10,12 @@
 #include <linux/timer.h>
 #include <linux/workqueue.h>
 #include <linux/wait.h>
-#include <linux/mempool.h>
-#include <linux/pfn.h>
 #include <linux/bio.h>
-#include <linux/stringify.h>
 #include <linux/gfp.h>
-#include <linux/smp.h>
 #include <linux/rcupdate.h>
 #include <linux/percpu-refcount.h>
 #include <linux/scatterlist.h>
 #include <linux/blkzoned.h>
-#include <linux/pm.h>
 #include <linux/sbitmap.h>
 
 struct module;
-- 
2.30.2

[PATCH 14/17] block: drop unused includes in <linux/genhd.h>

[Christoph Hellwig]

Drop various include not actually used in genhd.h itself, and
move the remaning includes closer together.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/um/drivers/ubd_kern.c      |  1 +
 block/genhd.c                   |  1 +
 block/holder.c                  |  1 +
 block/partitions/core.c         |  1 +
 drivers/block/amiflop.c         |  1 +
 drivers/block/ataflop.c         |  1 +
 drivers/block/floppy.c          |  1 +
 drivers/block/swim.c            |  1 +
 drivers/block/xen-blkfront.c    |  1 +
 drivers/md/md.c                 |  1 +
 drivers/s390/block/dasd_genhd.c |  1 +
 drivers/scsi/sd.c               |  1 +
 drivers/scsi/sg.c               |  1 +
 drivers/scsi/sr.c               |  1 +
 drivers/scsi/st.c               |  1 +
 include/linux/genhd.h           | 14 ++------------
 include/linux/part_stat.h       |  1 +
 17 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index cd9dc0556e913..fefd343412c79 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -27,6 +27,7 @@
 #include <linux/blk-mq.h>
 #include <linux/ata.h>
 #include <linux/hdreg.h>
+#include <linux/major.h>
 #include <linux/cdrom.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
diff --git a/block/genhd.c b/block/genhd.c
index 7b6e5e1cf9564..5e8aa0ab66c2a 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -19,6 +19,7 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/kmod.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/idr.h>
 #include <linux/log2.h>
diff --git a/block/holder.c b/block/holder.c
index 9dc084182337f..27cddce1b4461 100644
--- a/block/holder.c
+++ b/block/holder.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 #include <linux/genhd.h>
+#include <linux/slab.h>
 
 struct bd_holder_disk {
 	struct list_head	list;
diff --git a/block/partitions/core.c b/block/partitions/core.c
index 58c4c362c94f9..3a4898433c434 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2020 Christoph Hellwig
  */
 #include <linux/fs.h>
+#include <linux/major.h>
 #include <linux/slab.h>
 #include <linux/ctype.h>
 #include <linux/genhd.h>
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index b892e5185d6fa..2909fd9e72fb8 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -61,6 +61,7 @@
 #include <linux/hdreg.h>
 #include <linux/delay.h>
 #include <linux/init.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/fs.h>
 #include <linux/blk-mq.h>
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index a093644ac39fb..58e921ab57298 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -68,6 +68,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/blk-mq.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/completion.h>
 #include <linux/wait.h>
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index fef79ea52e3ed..6288ce8884147 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -184,6 +184,7 @@ static int print_unex = 1;
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
+#include <linux/major.h>
 #include <linux/platform_device.h>
 #include <linux/mod_devicetable.h>
 #include <linux/mutex.h>
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index 7ccc8d2a41bc6..3911d0833e1b9 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -16,6 +16,7 @@
 #include <linux/fd.h>
 #include <linux/slab.h>
 #include <linux/blk-mq.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/hdreg.h>
 #include <linux/kernel.h>
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 72902104f1112..df0deb9277601 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -42,6 +42,7 @@
 #include <linux/cdrom.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/scatterlist.h>
 #include <linux/bitmap.h>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index ae8fe54ea3581..0c7018462eaee 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -51,6 +51,7 @@
 #include <linux/hdreg.h>
 #include <linux/proc_fs.h>
 #include <linux/random.h>
+#include <linux/major.h>
 #include <linux/module.h>
 #include <linux/reboot.h>
 #include <linux/file.h>
diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index fa966e0db6ca9..3a6f3af240fa7 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -14,6 +14,7 @@
 #define KMSG_COMPONENT "dasd"
 
 #include <linux/interrupt.h>
+#include <linux/major.h>
 #include <linux/fs.h>
 #include <linux/blkpg.h>
 
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index cbd9999f93a6b..a18ae0950c491 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -48,6 +48,7 @@
 #include <linux/blkpg.h>
 #include <linux/blk-pm.h>
 #include <linux/delay.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/string_helpers.h>
 #include <linux/async.h>
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 8f05248920e8e..3c98f08dc25d9 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -31,6 +31,7 @@ static int sg_version_num = 30536;	/* 2 digits for each component */
 #include <linux/errno.h>
 #include <linux/mtio.h>
 #include <linux/ioctl.h>
+#include <linux/major.h>
 #include <linux/slab.h>
 #include <linux/fcntl.h>
 #include <linux/init.h>
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 8b17b35283aa5..115f7ef7a5def 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -44,6 +44,7 @@
 #include <linux/cdrom.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
+#include <linux/major.h>
 #include <linux/blkdev.h>
 #include <linux/blk-pm.h>
 #include <linux/mutex.h>
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 9d04929f03a10..8cc02f5264ba7 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -32,6 +32,7 @@ static const char *verstr = "20160209";
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/mtio.h>
+#include <linux/major.h>
 #include <linux/cdrom.h>
 #include <linux/ioctl.h>
 #include <linux/fcntl.h>
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index c68d83c87f83f..c1639c16b74c3 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -12,12 +12,10 @@
 
 #include <linux/types.h>
 #include <linux/kdev_t.h>
-#include <linux/rcupdate.h>
-#include <linux/slab.h>
-#include <linux/percpu-refcount.h>
 #include <linux/uuid.h>
 #include <linux/blk_types.h>
-#include <asm/local.h>
+#include <linux/device.h>
+#include <linux/xarray.h>
 
 extern const struct device_type disk_type;
 extern struct device_type part_type;
@@ -26,14 +24,6 @@ extern struct class block_class;
 #define DISK_MAX_PARTS			256
 #define DISK_NAME_LEN			32
 
-#include <linux/major.h>
-#include <linux/device.h>
-#include <linux/smp.h>
-#include <linux/string.h>
-#include <linux/fs.h>
-#include <linux/workqueue.h>
-#include <linux/xarray.h>
-
 #define PARTITION_META_INFO_VOLNAMELTH	64
 /*
  * Enough for the string representation of any kind of UUID plus NULL.
diff --git a/include/linux/part_stat.h b/include/linux/part_stat.h
index d2558121d48c0..6f7949b2fd8dc 100644
--- a/include/linux/part_stat.h
+++ b/include/linux/part_stat.h
@@ -3,6 +3,7 @@
 #define _LINUX_PART_STAT_H
 
 #include <linux/genhd.h>
+#include <asm/local.h>
 
 struct disk_stats {
 	u64 nsecs[NR_STAT_GROUPS];
-- 
2.30.2

[PATCH 15/17] block: move a few merge helpers out of <linux/blkdev.h>

[Christoph Hellwig]

These are block-layer internal helpers, so move them to block/blk.h and
block/blk-merge.c.  Also update a comment a bit to use better grammar.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 block/blk-merge.c      | 24 ++++++++++++++++
 block/blk.h            | 38 +++++++++++++++++++++++++
 include/linux/blkdev.h | 64 ------------------------------------------
 3 files changed, 62 insertions(+), 64 deletions(-)

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 7a5c81c02c800..39f210da399a6 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -558,6 +558,23 @@ static inline unsigned int blk_rq_get_max_segments(struct request *rq)
 	return queue_max_segments(rq->q);
 }
 
+static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
+						  sector_t offset)
+{
+	struct request_queue *q = rq->q;
+
+	if (blk_rq_is_passthrough(rq))
+		return q->limits.max_hw_sectors;
+
+	if (!q->limits.chunk_sectors ||
+	    req_op(rq) == REQ_OP_DISCARD ||
+	    req_op(rq) == REQ_OP_SECURE_ERASE)
+		return blk_queue_get_max_sectors(q, req_op(rq));
+
+	return min(blk_max_size_offset(q, offset, 0),
+			blk_queue_get_max_sectors(q, req_op(rq)));
+}
+
 static inline int ll_new_hw_segment(struct request *req, struct bio *bio,
 		unsigned int nr_phys_segs)
 {
@@ -718,6 +735,13 @@ static enum elv_merge blk_try_req_merge(struct request *req,
 	return ELEVATOR_NO_MERGE;
 }
 
+static inline bool blk_write_same_mergeable(struct bio *a, struct bio *b)
+{
+	if (bio_page(a) == bio_page(b) && bio_offset(a) == bio_offset(b))
+		return true;
+	return false;
+}
+
 /*
  * For non-mq, this has to be called with the request spinlock acquired.
  * For mq with scheduling, the appropriate queue wide lock should be held.
diff --git a/block/blk.h b/block/blk.h
index 82ab26add08df..deb8393e34eec 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -94,6 +94,44 @@ static inline bool bvec_gap_to_prev(struct request_queue *q,
 	return __bvec_gap_to_prev(q, bprv, offset);
 }
 
+static inline bool rq_mergeable(struct request *rq)
+{
+	if (blk_rq_is_passthrough(rq))
+		return false;
+
+	if (req_op(rq) == REQ_OP_FLUSH)
+		return false;
+
+	if (req_op(rq) == REQ_OP_WRITE_ZEROES)
+		return false;
+
+	if (req_op(rq) == REQ_OP_ZONE_APPEND)
+		return false;
+
+	if (rq->cmd_flags & REQ_NOMERGE_FLAGS)
+		return false;
+	if (rq->rq_flags & RQF_NOMERGE_FLAGS)
+		return false;
+
+	return true;
+}
+
+/*
+ * There are two different ways to handle DISCARD merges:
+ *  1) If max_discard_segments > 1, the driver treats every bio as a range and
+ *     send the bios to controller together. The ranges don't need to be
+ *     contiguous.
+ *  2) Otherwise, the request will be normal read/write requests.  The ranges
+ *     need to be contiguous.
+ */
+static inline bool blk_discard_mergable(struct request *req)
+{
+	if (req_op(req) == REQ_OP_DISCARD &&
+	    queue_max_discard_segments(req->q) > 1)
+		return true;
+	return false;
+}
+
 #ifdef CONFIG_BLK_DEV_INTEGRITY
 void blk_flush_integrity(void);
 bool __bio_integrity_endio(struct bio *);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 46a703394f7f4..be534040ca9c3 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -745,37 +745,6 @@ static inline bool rq_is_sync(struct request *rq)
 	return op_is_sync(rq->cmd_flags);
 }
 
-static inline bool rq_mergeable(struct request *rq)
-{
-	if (blk_rq_is_passthrough(rq))
-		return false;
-
-	if (req_op(rq) == REQ_OP_FLUSH)
-		return false;
-
-	if (req_op(rq) == REQ_OP_WRITE_ZEROES)
-		return false;
-
-	if (req_op(rq) == REQ_OP_ZONE_APPEND)
-		return false;
-
-	if (rq->cmd_flags & REQ_NOMERGE_FLAGS)
-		return false;
-	if (rq->rq_flags & RQF_NOMERGE_FLAGS)
-		return false;
-
-	return true;
-}
-
-static inline bool blk_write_same_mergeable(struct bio *a, struct bio *b)
-{
-	if (bio_page(a) == bio_page(b) &&
-	    bio_offset(a) == bio_offset(b))
-		return true;
-
-	return false;
-}
-
 static inline unsigned int blk_queue_depth(struct request_queue *q)
 {
 	if (q->queue_depth)
@@ -1030,23 +999,6 @@ static inline unsigned int blk_max_size_offset(struct request_queue *q,
 	return min(q->limits.max_sectors, chunk_sectors);
 }
 
-static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
-						  sector_t offset)
-{
-	struct request_queue *q = rq->q;
-
-	if (blk_rq_is_passthrough(rq))
-		return q->limits.max_hw_sectors;
-
-	if (!q->limits.chunk_sectors ||
-	    req_op(rq) == REQ_OP_DISCARD ||
-	    req_op(rq) == REQ_OP_SECURE_ERASE)
-		return blk_queue_get_max_sectors(q, req_op(rq));
-
-	return min(blk_max_size_offset(q, offset, 0),
-			blk_queue_get_max_sectors(q, req_op(rq)));
-}
-
 static inline unsigned int blk_rq_count_bios(struct request *rq)
 {
 	unsigned int nr_bios = 0;
@@ -1490,22 +1442,6 @@ static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector
 	return offset << SECTOR_SHIFT;
 }
 
-/*
- * Two cases of handling DISCARD merge:
- * If max_discard_segments > 1, the driver takes every bio
- * as a range and send them to controller together. The ranges
- * needn't to be contiguous.
- * Otherwise, the bios/requests will be handled as same as
- * others which should be contiguous.
- */
-static inline bool blk_discard_mergable(struct request *req)
-{
-	if (req_op(req) == REQ_OP_DISCARD &&
-	    queue_max_discard_segments(req->q) > 1)
-		return true;
-	return false;
-}
-
 static inline int bdev_discard_alignment(struct block_device *bdev)
 {
 	struct request_queue *q = bdev_get_queue(bdev);
-- 
2.30.2

[PATCH 16/17] block: move integrity handling out of <linux/blkdev.h>

[Christoph Hellwig]

Split the integrity/metadata handling definitions out into a new header.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/bdev.c                        |   1 +
 block/bio-integrity.c               |   2 +-
 block/blk-core.c                    |   1 +
 block/blk-integrity.c               |   2 +-
 block/blk-merge.c                   |   1 +
 block/blk-mq.c                      |   1 +
 block/keyslot-manager.c             |   1 +
 block/t10-pi.c                      |   2 +-
 drivers/md/dm-bio-record.h          |   1 +
 drivers/md/dm-crypt.c               |   1 +
 drivers/md/dm-table.c               |   1 +
 drivers/md/md.c                     |   1 +
 drivers/nvdimm/core.c               |   1 +
 drivers/nvme/host/core.c            |   1 +
 drivers/nvme/host/pci.c             |   1 +
 drivers/nvme/host/rdma.c            |   1 +
 drivers/nvme/target/io-cmd-bdev.c   |   1 +
 drivers/nvme/target/rdma.c          |   1 +
 drivers/scsi/scsi_lib.c             |   1 +
 drivers/scsi/sd_dif.c               |   2 +-
 drivers/scsi/virtio_scsi.c          |   1 +
 drivers/target/target_core_iblock.c |   1 +
 include/linux/blk-integrity.h       | 183 ++++++++++++++++++++++++++++
 include/linux/blkdev.h              | 183 ----------------------------
 24 files changed, 205 insertions(+), 187 deletions(-)
 create mode 100644 include/linux/blk-integrity.h

diff --git a/block/bdev.c b/block/bdev.c
index cf2780cb44a74..567534c63f3d5 100644
--- a/block/bdev.c
+++ b/block/bdev.c
@@ -12,6 +12,7 @@
 #include <linux/major.h>
 #include <linux/device_cgroup.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/backing-dev.h>
 #include <linux/module.h>
 #include <linux/blkpg.h>
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 6b47cddbbca17..21234ff966d9b 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -6,7 +6,7 @@
  * Written by: Martin K. Petersen <martin.petersen@oracle.com>
  */
 
-#include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/mempool.h>
 #include <linux/export.h>
 #include <linux/bio.h>
diff --git a/block/blk-core.c b/block/blk-core.c
index 5454db2fa263b..22c2982bb0bdf 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -18,6 +18,7 @@
 #include <linux/blkdev.h>
 #include <linux/blk-mq.h>
 #include <linux/blk-pm.h>
+#include <linux/blk-integrity.h>
 #include <linux/highmem.h>
 #include <linux/mm.h>
 #include <linux/pagemap.h>
diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index 16d5d5338392a..cef534a7cbc98 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -6,7 +6,7 @@
  * Written by: Martin K. Petersen <martin.petersen@oracle.com>
  */
 
-#include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/backing-dev.h>
 #include <linux/mempool.h>
 #include <linux/bio.h>
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 39f210da399a6..5b4f23014df8a 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -6,6 +6,7 @@
 #include <linux/module.h>
 #include <linux/bio.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/scatterlist.h>
 
 #include <trace/events/block.h>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 61264bff6103a..21bf4c3f08259 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -10,6 +10,7 @@
 #include <linux/backing-dev.h>
 #include <linux/bio.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/kmemleak.h>
 #include <linux/mm.h>
 #include <linux/init.h>
diff --git a/block/keyslot-manager.c b/block/keyslot-manager.c
index 2c4a55bea6ca1..1792159d12d18 100644
--- a/block/keyslot-manager.c
+++ b/block/keyslot-manager.c
@@ -35,6 +35,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/wait.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 
 struct blk_ksm_keyslot {
 	atomic_t slot_refs;
diff --git a/block/t10-pi.c b/block/t10-pi.c
index 00c203b2a921e..25a52a2a09a88 100644
--- a/block/t10-pi.c
+++ b/block/t10-pi.c
@@ -5,7 +5,7 @@
  */
 
 #include <linux/t10-pi.h>
-#include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/crc-t10dif.h>
 #include <linux/module.h>
 #include <net/checksum.h>
diff --git a/drivers/md/dm-bio-record.h b/drivers/md/dm-bio-record.h
index a3b71350eec84..745e3ab4aa0af 100644
--- a/drivers/md/dm-bio-record.h
+++ b/drivers/md/dm-bio-record.h
@@ -8,6 +8,7 @@
 #define DM_BIO_RECORD_H
 
 #include <linux/bio.h>
+#include <linux/blk-integrity.h>
 
 /*
  * There are lots of mutable fields in the bio struct that get
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 916b7da16de25..292f7896f7333 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -15,6 +15,7 @@
 #include <linux/key.h>
 #include <linux/bio.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/mempool.h>
 #include <linux/slab.h>
 #include <linux/crypto.h>
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 2111daaacabaf..1fa4d5582dca5 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -10,6 +10,7 @@
 #include <linux/module.h>
 #include <linux/vmalloc.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/namei.h>
 #include <linux/ctype.h>
 #include <linux/string.h>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0c7018462eaee..5e6232386b0ce 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -41,6 +41,7 @@
 #include <linux/sched/signal.h>
 #include <linux/kthread.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/badblocks.h>
 #include <linux/sysctl.h>
 #include <linux/seq_file.h>
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index 7de592d7eff45..6a45fa91e8a3e 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -7,6 +7,7 @@
 #include <linux/export.h>
 #include <linux/module.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/device.h>
 #include <linux/ctype.h>
 #include <linux/ndctl.h>
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 6600e138945e2..198779dfff632 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -6,6 +6,7 @@
 
 #include <linux/blkdev.h>
 #include <linux/blk-mq.h>
+#include <linux/blk-integrity.h>
 #include <linux/compat.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index b82492cd75033..ca5bda26226ae 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -10,6 +10,7 @@
 #include <linux/blkdev.h>
 #include <linux/blk-mq.h>
 #include <linux/blk-mq-pci.h>
+#include <linux/blk-integrity.h>
 #include <linux/dmi.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 042c594bc57e2..40317e1b91835 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -13,6 +13,7 @@
 #include <linux/atomic.h>
 #include <linux/blk-mq.h>
 #include <linux/blk-mq-rdma.h>
+#include <linux/blk-integrity.h>
 #include <linux/types.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c
index 0fc2781ab9708..6139e1de50a66 100644
--- a/drivers/nvme/target/io-cmd-bdev.c
+++ b/drivers/nvme/target/io-cmd-bdev.c
@@ -5,6 +5,7 @@
  */
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/module.h>
 #include "nvmet.h"
 
diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c
index 891174ccd44bb..38d1f292ecc20 100644
--- a/drivers/nvme/target/rdma.c
+++ b/drivers/nvme/target/rdma.c
@@ -5,6 +5,7 @@
  */
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 #include <linux/atomic.h>
+#include <linux/blk-integrity.h>
 #include <linux/ctype.h>
 #include <linux/delay.h>
 #include <linux/err.h>
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 572673873ddf8..33fd9a01330ce 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -21,6 +21,7 @@
 #include <linux/hardirq.h>
 #include <linux/scatterlist.h>
 #include <linux/blk-mq.h>
+#include <linux/blk-integrity.h>
 #include <linux/ratelimit.h>
 #include <asm/unaligned.h>
 
diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c
index 4cadb26070a8f..349950616adc5 100644
--- a/drivers/scsi/sd_dif.c
+++ b/drivers/scsi/sd_dif.c
@@ -6,7 +6,7 @@
  * Written by: Martin K. Petersen <martin.petersen@oracle.com>
  */
 
-#include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/t10-pi.h>
 
 #include <scsi/scsi.h>
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index c25ce8f0e0afc..b7c69b97f43ab 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -22,6 +22,7 @@
 #include <linux/virtio_scsi.h>
 #include <linux/cpu.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_device.h>
 #include <scsi/scsi_cmnd.h>
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 4069a1edcfa34..d39b87e2ed100 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -16,6 +16,7 @@
 #include <linux/timer.h>
 #include <linux/fs.h>
 #include <linux/blkdev.h>
+#include <linux/blk-integrity.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/bio.h>
diff --git a/include/linux/blk-integrity.h b/include/linux/blk-integrity.h
new file mode 100644
index 0000000000000..8a038ea0717e4
--- /dev/null
+++ b/include/linux/blk-integrity.h
@@ -0,0 +1,183 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_BLK_INTEGRITY_H
+#define _LINUX_BLK_INTEGRITY_H
+
+#include <linux/blk-mq.h>
+
+struct request;
+
+enum blk_integrity_flags {
+	BLK_INTEGRITY_VERIFY		= 1 << 0,
+	BLK_INTEGRITY_GENERATE		= 1 << 1,
+	BLK_INTEGRITY_DEVICE_CAPABLE	= 1 << 2,
+	BLK_INTEGRITY_IP_CHECKSUM	= 1 << 3,
+};
+
+struct blk_integrity_iter {
+	void			*prot_buf;
+	void			*data_buf;
+	sector_t		seed;
+	unsigned int		data_size;
+	unsigned short		interval;
+	const char		*disk_name;
+};
+
+typedef blk_status_t (integrity_processing_fn) (struct blk_integrity_iter *);
+typedef void (integrity_prepare_fn) (struct request *);
+typedef void (integrity_complete_fn) (struct request *, unsigned int);
+
+struct blk_integrity_profile {
+	integrity_processing_fn		*generate_fn;
+	integrity_processing_fn		*verify_fn;
+	integrity_prepare_fn		*prepare_fn;
+	integrity_complete_fn		*complete_fn;
+	const char			*name;
+};
+
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+void blk_integrity_register(struct gendisk *, struct blk_integrity *);
+void blk_integrity_unregister(struct gendisk *);
+int blk_integrity_compare(struct gendisk *, struct gendisk *);
+int blk_rq_map_integrity_sg(struct request_queue *, struct bio *,
+				   struct scatterlist *);
+int blk_rq_count_integrity_sg(struct request_queue *, struct bio *);
+
+static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
+{
+	struct blk_integrity *bi = &disk->queue->integrity;
+
+	if (!bi->profile)
+		return NULL;
+
+	return bi;
+}
+
+static inline struct blk_integrity *
+bdev_get_integrity(struct block_device *bdev)
+{
+	return blk_get_integrity(bdev->bd_disk);
+}
+
+static inline bool
+blk_integrity_queue_supports_integrity(struct request_queue *q)
+{
+	return q->integrity.profile;
+}
+
+static inline void blk_queue_max_integrity_segments(struct request_queue *q,
+						    unsigned int segs)
+{
+	q->limits.max_integrity_segments = segs;
+}
+
+static inline unsigned short
+queue_max_integrity_segments(const struct request_queue *q)
+{
+	return q->limits.max_integrity_segments;
+}
+
+/**
+ * bio_integrity_intervals - Return number of integrity intervals for a bio
+ * @bi:		blk_integrity profile for device
+ * @sectors:	Size of the bio in 512-byte sectors
+ *
+ * Description: The block layer calculates everything in 512 byte
+ * sectors but integrity metadata is done in terms of the data integrity
+ * interval size of the storage device.  Convert the block layer sectors
+ * to the appropriate number of integrity intervals.
+ */
+static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
+						   unsigned int sectors)
+{
+	return sectors >> (bi->interval_exp - 9);
+}
+
+static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
+					       unsigned int sectors)
+{
+	return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
+}
+
+static inline bool blk_integrity_rq(struct request *rq)
+{
+	return rq->cmd_flags & REQ_INTEGRITY;
+}
+
+/*
+ * Return the first bvec that contains integrity data.  Only drivers that are
+ * limited to a single integrity segment should use this helper.
+ */
+static inline struct bio_vec *rq_integrity_vec(struct request *rq)
+{
+	if (WARN_ON_ONCE(queue_max_integrity_segments(rq->q) > 1))
+		return NULL;
+	return rq->bio->bi_integrity->bip_vec;
+}
+#else /* CONFIG_BLK_DEV_INTEGRITY */
+static inline int blk_rq_count_integrity_sg(struct request_queue *q,
+					    struct bio *b)
+{
+	return 0;
+}
+static inline int blk_rq_map_integrity_sg(struct request_queue *q,
+					  struct bio *b,
+					  struct scatterlist *s)
+{
+	return 0;
+}
+static inline struct blk_integrity *bdev_get_integrity(struct block_device *b)
+{
+	return NULL;
+}
+static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
+{
+	return NULL;
+}
+static inline bool
+blk_integrity_queue_supports_integrity(struct request_queue *q)
+{
+	return false;
+}
+static inline int blk_integrity_compare(struct gendisk *a, struct gendisk *b)
+{
+	return 0;
+}
+static inline void blk_integrity_register(struct gendisk *d,
+					 struct blk_integrity *b)
+{
+}
+static inline void blk_integrity_unregister(struct gendisk *d)
+{
+}
+static inline void blk_queue_max_integrity_segments(struct request_queue *q,
+						    unsigned int segs)
+{
+}
+static inline unsigned short
+queue_max_integrity_segments(const struct request_queue *q)
+{
+	return 0;
+}
+
+static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
+						   unsigned int sectors)
+{
+	return 0;
+}
+
+static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
+					       unsigned int sectors)
+{
+	return 0;
+}
+static inline int blk_integrity_rq(struct request *rq)
+{
+	return 0;
+}
+
+static inline struct bio_vec *rq_integrity_vec(struct request *rq)
+{
+	return NULL;
+}
+#endif /* CONFIG_BLK_DEV_INTEGRITY */
+#endif /* _LINUX_BLK_INTEGRITY_H */
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index be534040ca9c3..56e60e5c09d07 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1555,189 +1555,6 @@ int kblockd_mod_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned lo
 #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \
 	MODULE_ALIAS("block-major-" __stringify(major) "-*")
 
-#if defined(CONFIG_BLK_DEV_INTEGRITY)
-
-enum blk_integrity_flags {
-	BLK_INTEGRITY_VERIFY		= 1 << 0,
-	BLK_INTEGRITY_GENERATE		= 1 << 1,
-	BLK_INTEGRITY_DEVICE_CAPABLE	= 1 << 2,
-	BLK_INTEGRITY_IP_CHECKSUM	= 1 << 3,
-};
-
-struct blk_integrity_iter {
-	void			*prot_buf;
-	void			*data_buf;
-	sector_t		seed;
-	unsigned int		data_size;
-	unsigned short		interval;
-	const char		*disk_name;
-};
-
-typedef blk_status_t (integrity_processing_fn) (struct blk_integrity_iter *);
-typedef void (integrity_prepare_fn) (struct request *);
-typedef void (integrity_complete_fn) (struct request *, unsigned int);
-
-struct blk_integrity_profile {
-	integrity_processing_fn		*generate_fn;
-	integrity_processing_fn		*verify_fn;
-	integrity_prepare_fn		*prepare_fn;
-	integrity_complete_fn		*complete_fn;
-	const char			*name;
-};
-
-extern void blk_integrity_register(struct gendisk *, struct blk_integrity *);
-extern void blk_integrity_unregister(struct gendisk *);
-extern int blk_integrity_compare(struct gendisk *, struct gendisk *);
-extern int blk_rq_map_integrity_sg(struct request_queue *, struct bio *,
-				   struct scatterlist *);
-extern int blk_rq_count_integrity_sg(struct request_queue *, struct bio *);
-
-static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
-{
-	struct blk_integrity *bi = &disk->queue->integrity;
-
-	if (!bi->profile)
-		return NULL;
-
-	return bi;
-}
-
-static inline
-struct blk_integrity *bdev_get_integrity(struct block_device *bdev)
-{
-	return blk_get_integrity(bdev->bd_disk);
-}
-
-static inline bool
-blk_integrity_queue_supports_integrity(struct request_queue *q)
-{
-	return q->integrity.profile;
-}
-
-static inline bool blk_integrity_rq(struct request *rq)
-{
-	return rq->cmd_flags & REQ_INTEGRITY;
-}
-
-static inline void blk_queue_max_integrity_segments(struct request_queue *q,
-						    unsigned int segs)
-{
-	q->limits.max_integrity_segments = segs;
-}
-
-static inline unsigned short
-queue_max_integrity_segments(const struct request_queue *q)
-{
-	return q->limits.max_integrity_segments;
-}
-
-/**
- * bio_integrity_intervals - Return number of integrity intervals for a bio
- * @bi:		blk_integrity profile for device
- * @sectors:	Size of the bio in 512-byte sectors
- *
- * Description: The block layer calculates everything in 512 byte
- * sectors but integrity metadata is done in terms of the data integrity
- * interval size of the storage device.  Convert the block layer sectors
- * to the appropriate number of integrity intervals.
- */
-static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
-						   unsigned int sectors)
-{
-	return sectors >> (bi->interval_exp - 9);
-}
-
-static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
-					       unsigned int sectors)
-{
-	return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
-}
-
-/*
- * Return the first bvec that contains integrity data.  Only drivers that are
- * limited to a single integrity segment should use this helper.
- */
-static inline struct bio_vec *rq_integrity_vec(struct request *rq)
-{
-	if (WARN_ON_ONCE(queue_max_integrity_segments(rq->q) > 1))
-		return NULL;
-	return rq->bio->bi_integrity->bip_vec;
-}
-
-#else /* CONFIG_BLK_DEV_INTEGRITY */
-
-struct bio;
-struct block_device;
-struct gendisk;
-struct blk_integrity;
-
-static inline int blk_integrity_rq(struct request *rq)
-{
-	return 0;
-}
-static inline int blk_rq_count_integrity_sg(struct request_queue *q,
-					    struct bio *b)
-{
-	return 0;
-}
-static inline int blk_rq_map_integrity_sg(struct request_queue *q,
-					  struct bio *b,
-					  struct scatterlist *s)
-{
-	return 0;
-}
-static inline struct blk_integrity *bdev_get_integrity(struct block_device *b)
-{
-	return NULL;
-}
-static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
-{
-	return NULL;
-}
-static inline bool
-blk_integrity_queue_supports_integrity(struct request_queue *q)
-{
-	return false;
-}
-static inline int blk_integrity_compare(struct gendisk *a, struct gendisk *b)
-{
-	return 0;
-}
-static inline void blk_integrity_register(struct gendisk *d,
-					 struct blk_integrity *b)
-{
-}
-static inline void blk_integrity_unregister(struct gendisk *d)
-{
-}
-static inline void blk_queue_max_integrity_segments(struct request_queue *q,
-						    unsigned int segs)
-{
-}
-static inline unsigned short queue_max_integrity_segments(const struct request_queue *q)
-{
-	return 0;
-}
-
-static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
-						   unsigned int sectors)
-{
-	return 0;
-}
-
-static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
-					       unsigned int sectors)
-{
-	return 0;
-}
-
-static inline struct bio_vec *rq_integrity_vec(struct request *rq)
-{
-	return NULL;
-}
-
-#endif /* CONFIG_BLK_DEV_INTEGRITY */
-
 #ifdef CONFIG_BLK_INLINE_ENCRYPTION
 
 bool blk_ksm_register(struct blk_keyslot_manager *ksm, struct request_queue *q);
-- 
2.30.2

[PATCH 17/17] block: move struct request to blk-mq.h

[Christoph Hellwig]

struct request is only used by blk-mq drivers, so move it and all
related declarations to blk-mq.h.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 block/blk-crypto-fallback.c         |   1 +
 block/blk-crypto-internal.h         |   2 +-
 drivers/block/rnbd/rnbd-proto.h     |   2 +-
 drivers/md/dm-verity-target.c       |   1 +
 drivers/mmc/core/sd.c               |   1 +
 drivers/target/target_core_file.c   |   1 +
 drivers/target/target_core_iblock.c |   1 +
 include/linux/blk-mq.h              | 465 +++++++++++++++++++++++++++
 include/linux/blk_types.h           |   2 -
 include/linux/blkdev.h              | 469 +---------------------------
 include/linux/blktrace_api.h        |   2 +-
 include/linux/t10-pi.h              |   2 +-
 include/scsi/scsi_device.h          |   2 +-
 13 files changed, 476 insertions(+), 475 deletions(-)

diff --git a/block/blk-crypto-fallback.c b/block/blk-crypto-fallback.c
index c322176a1e099..ec4c7823541c8 100644
--- a/block/blk-crypto-fallback.c
+++ b/block/blk-crypto-fallback.c
@@ -18,6 +18,7 @@
 #include <linux/mempool.h>
 #include <linux/module.h>
 #include <linux/random.h>
+#include <linux/scatterlist.h>
 
 #include "blk-crypto-internal.h"
 
diff --git a/block/blk-crypto-internal.h b/block/blk-crypto-internal.h
index 0d36aae538d7b..2fb0d65a464ca 100644
--- a/block/blk-crypto-internal.h
+++ b/block/blk-crypto-internal.h
@@ -7,7 +7,7 @@
 #define __LINUX_BLK_CRYPTO_INTERNAL_H
 
 #include <linux/bio.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 
 /* Represents a crypto mode supported by blk-crypto  */
 struct blk_crypto_mode {
diff --git a/drivers/block/rnbd/rnbd-proto.h b/drivers/block/rnbd/rnbd-proto.h
index c1bc5c0fef71d..de5d5a8df81d7 100644
--- a/drivers/block/rnbd/rnbd-proto.h
+++ b/drivers/block/rnbd/rnbd-proto.h
@@ -10,7 +10,7 @@
 #define RNBD_PROTO_H
 
 #include <linux/types.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/limits.h>
 #include <linux/inet.h>
 #include <linux/in.h>
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index 22a5ac82446a6..88e2702b473b0 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -18,6 +18,7 @@
 #include "dm-verity-verify-sig.h"
 #include <linux/module.h>
 #include <linux/reboot.h>
+#include <linux/scatterlist.h>
 
 #define DM_MSG_PREFIX			"verity"
 
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 4646b7a03db6b..c9db24e16af13 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -12,6 +12,7 @@
 #include <linux/slab.h>
 #include <linux/stat.h>
 #include <linux/pm_runtime.h>
+#include <linux/scatterlist.h>
 
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index ef4a8e189fba0..02f64453b4c5f 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -20,6 +20,7 @@
 #include <linux/vmalloc.h>
 #include <linux/falloc.h>
 #include <linux/uio.h>
+#include <linux/scatterlist.h>
 #include <scsi/scsi_proto.h>
 #include <asm/unaligned.h>
 
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index d39b87e2ed100..31df20abe141f 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -23,6 +23,7 @@
 #include <linux/genhd.h>
 #include <linux/file.h>
 #include <linux/module.h>
+#include <linux/scatterlist.h>
 #include <scsi/scsi_proto.h>
 #include <asm/unaligned.h>
 
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 13ba1861e688f..bd4086a6f28e0 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -6,10 +6,218 @@
 #include <linux/sbitmap.h>
 #include <linux/srcu.h>
 #include <linux/lockdep.h>
+#include <linux/scatterlist.h>
 
 struct blk_mq_tags;
 struct blk_flush_queue;
 
+#define BLKDEV_MIN_RQ	4
+#define BLKDEV_MAX_RQ	128	/* Default maximum */
+
+typedef void (rq_end_io_fn)(struct request *, blk_status_t);
+
+/*
+ * request flags */
+typedef __u32 __bitwise req_flags_t;
+
+/* drive already may have started this one */
+#define RQF_STARTED		((__force req_flags_t)(1 << 1))
+/* may not be passed by ioscheduler */
+#define RQF_SOFTBARRIER		((__force req_flags_t)(1 << 3))
+/* request for flush sequence */
+#define RQF_FLUSH_SEQ		((__force req_flags_t)(1 << 4))
+/* merge of different types, fail separately */
+#define RQF_MIXED_MERGE		((__force req_flags_t)(1 << 5))
+/* track inflight for MQ */
+#define RQF_MQ_INFLIGHT		((__force req_flags_t)(1 << 6))
+/* don't call prep for this one */
+#define RQF_DONTPREP		((__force req_flags_t)(1 << 7))
+/* vaguely specified driver internal error.  Ignored by the block layer */
+#define RQF_FAILED		((__force req_flags_t)(1 << 10))
+/* don't warn about errors */
+#define RQF_QUIET		((__force req_flags_t)(1 << 11))
+/* elevator private data attached */
+#define RQF_ELVPRIV		((__force req_flags_t)(1 << 12))
+/* account into disk and partition IO statistics */
+#define RQF_IO_STAT		((__force req_flags_t)(1 << 13))
+/* runtime pm request */
+#define RQF_PM			((__force req_flags_t)(1 << 15))
+/* on IO scheduler merge hash */
+#define RQF_HASHED		((__force req_flags_t)(1 << 16))
+/* track IO completion time */
+#define RQF_STATS		((__force req_flags_t)(1 << 17))
+/* Look at ->special_vec for the actual data payload instead of the
+   bio chain. */
+#define RQF_SPECIAL_PAYLOAD	((__force req_flags_t)(1 << 18))
+/* The per-zone write lock is held for this request */
+#define RQF_ZONE_WRITE_LOCKED	((__force req_flags_t)(1 << 19))
+/* already slept for hybrid poll */
+#define RQF_MQ_POLL_SLEPT	((__force req_flags_t)(1 << 20))
+/* ->timeout has been called, don't expire again */
+#define RQF_TIMED_OUT		((__force req_flags_t)(1 << 21))
+
+/* flags that prevent us from merging requests: */
+#define RQF_NOMERGE_FLAGS \
+	(RQF_STARTED | RQF_SOFTBARRIER | RQF_FLUSH_SEQ | RQF_SPECIAL_PAYLOAD)
+
+enum mq_rq_state {
+	MQ_RQ_IDLE		= 0,
+	MQ_RQ_IN_FLIGHT		= 1,
+	MQ_RQ_COMPLETE		= 2,
+};
+
+/*
+ * Try to put the fields that are referenced together in the same cacheline.
+ *
+ * If you modify this structure, make sure to update blk_rq_init() and
+ * especially blk_mq_rq_ctx_init() to take care of the added fields.
+ */
+struct request {
+	struct request_queue *q;
+	struct blk_mq_ctx *mq_ctx;
+	struct blk_mq_hw_ctx *mq_hctx;
+
+	unsigned int cmd_flags;		/* op and common flags */
+	req_flags_t rq_flags;
+
+	int tag;
+	int internal_tag;
+
+	/* the following two fields are internal, NEVER access directly */
+	unsigned int __data_len;	/* total data len */
+	sector_t __sector;		/* sector cursor */
+
+	struct bio *bio;
+	struct bio *biotail;
+
+	struct list_head queuelist;
+
+	/*
+	 * The hash is used inside the scheduler, and killed once the
+	 * request reaches the dispatch list. The ipi_list is only used
+	 * to queue the request for softirq completion, which is long
+	 * after the request has been unhashed (and even removed from
+	 * the dispatch list).
+	 */
+	union {
+		struct hlist_node hash;	/* merge hash */
+		struct llist_node ipi_list;
+	};
+
+	/*
+	 * The rb_node is only used inside the io scheduler, requests
+	 * are pruned when moved to the dispatch queue. So let the
+	 * completion_data share space with the rb_node.
+	 */
+	union {
+		struct rb_node rb_node;	/* sort/lookup */
+		struct bio_vec special_vec;
+		void *completion_data;
+		int error_count; /* for legacy drivers, don't use */
+	};
+
+	/*
+	 * Three pointers are available for the IO schedulers, if they need
+	 * more they have to dynamically allocate it.  Flush requests are
+	 * never put on the IO scheduler. So let the flush fields share
+	 * space with the elevator data.
+	 */
+	union {
+		struct {
+			struct io_cq		*icq;
+			void			*priv[2];
+		} elv;
+
+		struct {
+			unsigned int		seq;
+			struct list_head	list;
+			rq_end_io_fn		*saved_end_io;
+		} flush;
+	};
+
+	struct gendisk *rq_disk;
+	struct block_device *part;
+#ifdef CONFIG_BLK_RQ_ALLOC_TIME
+	/* Time that the first bio started allocating this request. */
+	u64 alloc_time_ns;
+#endif
+	/* Time that this request was allocated for this IO. */
+	u64 start_time_ns;
+	/* Time that I/O was submitted to the device. */
+	u64 io_start_time_ns;
+
+#ifdef CONFIG_BLK_WBT
+	unsigned short wbt_flags;
+#endif
+	/*
+	 * rq sectors used for blk stats. It has the same value
+	 * with blk_rq_sectors(rq), except that it never be zeroed
+	 * by completion.
+	 */
+	unsigned short stats_sectors;
+
+	/*
+	 * Number of scatter-gather DMA addr+len pairs after
+	 * physical address coalescing is performed.
+	 */
+	unsigned short nr_phys_segments;
+
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+	unsigned short nr_integrity_segments;
+#endif
+
+#ifdef CONFIG_BLK_INLINE_ENCRYPTION
+	struct bio_crypt_ctx *crypt_ctx;
+	struct blk_ksm_keyslot *crypt_keyslot;
+#endif
+
+	unsigned short write_hint;
+	unsigned short ioprio;
+
+	enum mq_rq_state state;
+	refcount_t ref;
+
+	unsigned int timeout;
+	unsigned long deadline;
+
+	union {
+		struct __call_single_data csd;
+		u64 fifo_time;
+	};
+
+	/*
+	 * completion callback.
+	 */
+	rq_end_io_fn *end_io;
+	void *end_io_data;
+};
+
+#define req_op(req) \
+	((req)->cmd_flags & REQ_OP_MASK)
+
+static inline bool blk_rq_is_passthrough(struct request *rq)
+{
+	return blk_op_is_passthrough(req_op(rq));
+}
+
+static inline unsigned short req_get_ioprio(struct request *req)
+{
+	return req->ioprio;
+}
+
+#define rq_data_dir(rq)		(op_is_write(req_op(rq)) ? WRITE : READ)
+
+#define rq_dma_dir(rq) \
+	(op_is_write(req_op(rq)) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
+
+enum blk_eh_timer_return {
+	BLK_EH_DONE,		/* drivers has completed the command */
+	BLK_EH_RESET_TIMER,	/* reset timer and try again */
+};
+
+#define BLK_TAG_ALLOC_FIFO 0 /* allocate starting from 0 */
+#define BLK_TAG_ALLOC_RR 1 /* allocate starting from last allocated tag */
+
 /**
  * struct blk_mq_hw_ctx - State for a hardware queue facing the hardware
  * block device
@@ -637,4 +845,261 @@ blk_qc_t blk_mq_submit_bio(struct bio *bio);
 void blk_mq_hctx_set_fq_lock_class(struct blk_mq_hw_ctx *hctx,
 		struct lock_class_key *key);
 
+static inline bool rq_is_sync(struct request *rq)
+{
+	return op_is_sync(rq->cmd_flags);
+}
+
+void blk_rq_init(struct request_queue *q, struct request *rq);
+void blk_put_request(struct request *rq);
+struct request *blk_get_request(struct request_queue *q, unsigned int op,
+		blk_mq_req_flags_t flags);
+int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
+		struct bio_set *bs, gfp_t gfp_mask,
+		int (*bio_ctr)(struct bio *, struct bio *, void *), void *data);
+void blk_rq_unprep_clone(struct request *rq);
+blk_status_t blk_insert_cloned_request(struct request_queue *q,
+		struct request *rq);
+
+struct rq_map_data {
+	struct page **pages;
+	int page_order;
+	int nr_entries;
+	unsigned long offset;
+	int null_mapped;
+	int from_user;
+};
+
+int blk_rq_map_user(struct request_queue *, struct request *,
+		struct rq_map_data *, void __user *, unsigned long, gfp_t);
+int blk_rq_map_user_iov(struct request_queue *, struct request *,
+		struct rq_map_data *, const struct iov_iter *, gfp_t);
+int blk_rq_unmap_user(struct bio *);
+int blk_rq_map_kern(struct request_queue *, struct request *, void *,
+		unsigned int, gfp_t);
+int blk_rq_append_bio(struct request *rq, struct bio *bio);
+void blk_execute_rq_nowait(struct gendisk *, struct request *, int,
+		rq_end_io_fn *);
+blk_status_t blk_execute_rq(struct gendisk *bd_disk, struct request *rq,
+		int at_head);
+
+struct req_iterator {
+	struct bvec_iter iter;
+	struct bio *bio;
+};
+
+#define __rq_for_each_bio(_bio, rq)	\
+	if ((rq->bio))			\
+		for (_bio = (rq)->bio; _bio; _bio = _bio->bi_next)
+
+#define rq_for_each_segment(bvl, _rq, _iter)			\
+	__rq_for_each_bio(_iter.bio, _rq)			\
+		bio_for_each_segment(bvl, _iter.bio, _iter.iter)
+
+#define rq_for_each_bvec(bvl, _rq, _iter)			\
+	__rq_for_each_bio(_iter.bio, _rq)			\
+		bio_for_each_bvec(bvl, _iter.bio, _iter.iter)
+
+#define rq_iter_last(bvec, _iter)				\
+		(_iter.bio->bi_next == NULL &&			\
+		 bio_iter_last(bvec, _iter.iter))
+
+/*
+ * blk_rq_pos()			: the current sector
+ * blk_rq_bytes()		: bytes left in the entire request
+ * blk_rq_cur_bytes()		: bytes left in the current segment
+ * blk_rq_err_bytes()		: bytes left till the next error boundary
+ * blk_rq_sectors()		: sectors left in the entire request
+ * blk_rq_cur_sectors()		: sectors left in the current segment
+ * blk_rq_stats_sectors()	: sectors of the entire request used for stats
+ */
+static inline sector_t blk_rq_pos(const struct request *rq)
+{
+	return rq->__sector;
+}
+
+static inline unsigned int blk_rq_bytes(const struct request *rq)
+{
+	return rq->__data_len;
+}
+
+static inline int blk_rq_cur_bytes(const struct request *rq)
+{
+	return rq->bio ? bio_cur_bytes(rq->bio) : 0;
+}
+
+unsigned int blk_rq_err_bytes(const struct request *rq);
+
+static inline unsigned int blk_rq_sectors(const struct request *rq)
+{
+	return blk_rq_bytes(rq) >> SECTOR_SHIFT;
+}
+
+static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
+{
+	return blk_rq_cur_bytes(rq) >> SECTOR_SHIFT;
+}
+
+static inline unsigned int blk_rq_stats_sectors(const struct request *rq)
+{
+	return rq->stats_sectors;
+}
+
+/*
+ * Some commands like WRITE SAME have a payload or data transfer size which
+ * is different from the size of the request.  Any driver that supports such
+ * commands using the RQF_SPECIAL_PAYLOAD flag needs to use this helper to
+ * calculate the data transfer size.
+ */
+static inline unsigned int blk_rq_payload_bytes(struct request *rq)
+{
+	if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
+		return rq->special_vec.bv_len;
+	return blk_rq_bytes(rq);
+}
+
+/*
+ * Return the first full biovec in the request.  The caller needs to check that
+ * there are any bvecs before calling this helper.
+ */
+static inline struct bio_vec req_bvec(struct request *rq)
+{
+	if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
+		return rq->special_vec;
+	return mp_bvec_iter_bvec(rq->bio->bi_io_vec, rq->bio->bi_iter);
+}
+
+static inline unsigned int blk_rq_count_bios(struct request *rq)
+{
+	unsigned int nr_bios = 0;
+	struct bio *bio;
+
+	__rq_for_each_bio(bio, rq)
+		nr_bios++;
+
+	return nr_bios;
+}
+
+void blk_steal_bios(struct bio_list *list, struct request *rq);
+
+/*
+ * Request completion related functions.
+ *
+ * blk_update_request() completes given number of bytes and updates
+ * the request without completing it.
+ */
+bool blk_update_request(struct request *rq, blk_status_t error,
+			       unsigned int nr_bytes);
+void blk_abort_request(struct request *);
+
+/*
+ * Number of physical segments as sent to the device.
+ *
+ * Normally this is the number of discontiguous data segments sent by the
+ * submitter.  But for data-less command like discard we might have no
+ * actual data segments submitted, but the driver might have to add it's
+ * own special payload.  In that case we still return 1 here so that this
+ * special payload will be mapped.
+ */
+static inline unsigned short blk_rq_nr_phys_segments(struct request *rq)
+{
+	if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
+		return 1;
+	return rq->nr_phys_segments;
+}
+
+/*
+ * Number of discard segments (or ranges) the driver needs to fill in.
+ * Each discard bio merged into a request is counted as one segment.
+ */
+static inline unsigned short blk_rq_nr_discard_segments(struct request *rq)
+{
+	return max_t(unsigned short, rq->nr_phys_segments, 1);
+}
+
+int __blk_rq_map_sg(struct request_queue *q, struct request *rq,
+		struct scatterlist *sglist, struct scatterlist **last_sg);
+static inline int blk_rq_map_sg(struct request_queue *q, struct request *rq,
+		struct scatterlist *sglist)
+{
+	struct scatterlist *last_sg = NULL;
+
+	return __blk_rq_map_sg(q, rq, sglist, &last_sg);
+}
+void blk_dump_rq_flags(struct request *, char *);
+
+#ifdef CONFIG_BLK_DEV_ZONED
+static inline unsigned int blk_rq_zone_no(struct request *rq)
+{
+	return blk_queue_zone_no(rq->q, blk_rq_pos(rq));
+}
+
+static inline unsigned int blk_rq_zone_is_seq(struct request *rq)
+{
+	return blk_queue_zone_is_seq(rq->q, blk_rq_pos(rq));
+}
+
+bool blk_req_needs_zone_write_lock(struct request *rq);
+bool blk_req_zone_write_trylock(struct request *rq);
+void __blk_req_zone_write_lock(struct request *rq);
+void __blk_req_zone_write_unlock(struct request *rq);
+
+static inline void blk_req_zone_write_lock(struct request *rq)
+{
+	if (blk_req_needs_zone_write_lock(rq))
+		__blk_req_zone_write_lock(rq);
+}
+
+static inline void blk_req_zone_write_unlock(struct request *rq)
+{
+	if (rq->rq_flags & RQF_ZONE_WRITE_LOCKED)
+		__blk_req_zone_write_unlock(rq);
+}
+
+static inline bool blk_req_zone_is_write_locked(struct request *rq)
+{
+	return rq->q->seq_zones_wlock &&
+		test_bit(blk_rq_zone_no(rq), rq->q->seq_zones_wlock);
+}
+
+static inline bool blk_req_can_dispatch_to_zone(struct request *rq)
+{
+	if (!blk_req_needs_zone_write_lock(rq))
+		return true;
+	return !blk_req_zone_is_write_locked(rq);
+}
+#else /* CONFIG_BLK_DEV_ZONED */
+static inline bool blk_req_needs_zone_write_lock(struct request *rq)
+{
+	return false;
+}
+
+static inline void blk_req_zone_write_lock(struct request *rq)
+{
+}
+
+static inline void blk_req_zone_write_unlock(struct request *rq)
+{
+}
+static inline bool blk_req_zone_is_write_locked(struct request *rq)
+{
+	return false;
+}
+
+static inline bool blk_req_can_dispatch_to_zone(struct request *rq)
+{
+	return true;
+}
+#endif /* CONFIG_BLK_DEV_ZONED */
+
+#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
+# error	"You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform"
 #endif
+#if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
+void rq_flush_dcache_pages(struct request *rq);
+#else
+static inline void rq_flush_dcache_pages(struct request *rq)
+{
+}
+#endif /* ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE */
+#endif /* BLK_MQ_H */
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index be622b5a21ed5..3b967053e9f5a 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -431,8 +431,6 @@ enum stat_group {
 
 #define bio_op(bio) \
 	((bio)->bi_opf & REQ_OP_MASK)
-#define req_op(req) \
-	((req)->cmd_flags & REQ_OP_MASK)
 
 /* obsolete, don't use in new code */
 static inline void bio_set_op_attrs(struct bio *bio, unsigned op,
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 56e60e5c09d07..0e960d74615ec 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -14,7 +14,6 @@
 #include <linux/gfp.h>
 #include <linux/rcupdate.h>
 #include <linux/percpu-refcount.h>
-#include <linux/scatterlist.h>
 #include <linux/blkzoned.h>
 #include <linux/sbitmap.h>
 
@@ -32,9 +31,6 @@ struct blk_queue_stats;
 struct blk_stat_callback;
 struct blk_keyslot_manager;
 
-#define BLKDEV_MIN_RQ	4
-#define BLKDEV_MAX_RQ	128	/* Default maximum */
-
 /* Must be consistent with blk_mq_poll_stats_bkt() */
 #define BLK_MQ_POLL_STATS_BKTS 16
 
@@ -47,213 +43,12 @@ struct blk_keyslot_manager;
  */
 #define BLKCG_MAX_POLS		6
 
-typedef void (rq_end_io_fn)(struct request *, blk_status_t);
-
-/*
- * request flags */
-typedef __u32 __bitwise req_flags_t;
-
-/* drive already may have started this one */
-#define RQF_STARTED		((__force req_flags_t)(1 << 1))
-/* may not be passed by ioscheduler */
-#define RQF_SOFTBARRIER		((__force req_flags_t)(1 << 3))
-/* request for flush sequence */
-#define RQF_FLUSH_SEQ		((__force req_flags_t)(1 << 4))
-/* merge of different types, fail separately */
-#define RQF_MIXED_MERGE		((__force req_flags_t)(1 << 5))
-/* track inflight for MQ */
-#define RQF_MQ_INFLIGHT		((__force req_flags_t)(1 << 6))
-/* don't call prep for this one */
-#define RQF_DONTPREP		((__force req_flags_t)(1 << 7))
-/* vaguely specified driver internal error.  Ignored by the block layer */
-#define RQF_FAILED		((__force req_flags_t)(1 << 10))
-/* don't warn about errors */
-#define RQF_QUIET		((__force req_flags_t)(1 << 11))
-/* elevator private data attached */
-#define RQF_ELVPRIV		((__force req_flags_t)(1 << 12))
-/* account into disk and partition IO statistics */
-#define RQF_IO_STAT		((__force req_flags_t)(1 << 13))
-/* runtime pm request */
-#define RQF_PM			((__force req_flags_t)(1 << 15))
-/* on IO scheduler merge hash */
-#define RQF_HASHED		((__force req_flags_t)(1 << 16))
-/* track IO completion time */
-#define RQF_STATS		((__force req_flags_t)(1 << 17))
-/* Look at ->special_vec for the actual data payload instead of the
-   bio chain. */
-#define RQF_SPECIAL_PAYLOAD	((__force req_flags_t)(1 << 18))
-/* The per-zone write lock is held for this request */
-#define RQF_ZONE_WRITE_LOCKED	((__force req_flags_t)(1 << 19))
-/* already slept for hybrid poll */
-#define RQF_MQ_POLL_SLEPT	((__force req_flags_t)(1 << 20))
-/* ->timeout has been called, don't expire again */
-#define RQF_TIMED_OUT		((__force req_flags_t)(1 << 21))
-
-/* flags that prevent us from merging requests: */
-#define RQF_NOMERGE_FLAGS \
-	(RQF_STARTED | RQF_SOFTBARRIER | RQF_FLUSH_SEQ | RQF_SPECIAL_PAYLOAD)
-
-/*
- * Request state for blk-mq.
- */
-enum mq_rq_state {
-	MQ_RQ_IDLE		= 0,
-	MQ_RQ_IN_FLIGHT		= 1,
-	MQ_RQ_COMPLETE		= 2,
-};
-
-/*
- * Try to put the fields that are referenced together in the same cacheline.
- *
- * If you modify this structure, make sure to update blk_rq_init() and
- * especially blk_mq_rq_ctx_init() to take care of the added fields.
- */
-struct request {
-	struct request_queue *q;
-	struct blk_mq_ctx *mq_ctx;
-	struct blk_mq_hw_ctx *mq_hctx;
-
-	unsigned int cmd_flags;		/* op and common flags */
-	req_flags_t rq_flags;
-
-	int tag;
-	int internal_tag;
-
-	/* the following two fields are internal, NEVER access directly */
-	unsigned int __data_len;	/* total data len */
-	sector_t __sector;		/* sector cursor */
-
-	struct bio *bio;
-	struct bio *biotail;
-
-	struct list_head queuelist;
-
-	/*
-	 * The hash is used inside the scheduler, and killed once the
-	 * request reaches the dispatch list. The ipi_list is only used
-	 * to queue the request for softirq completion, which is long
-	 * after the request has been unhashed (and even removed from
-	 * the dispatch list).
-	 */
-	union {
-		struct hlist_node hash;	/* merge hash */
-		struct llist_node ipi_list;
-	};
-
-	/*
-	 * The rb_node is only used inside the io scheduler, requests
-	 * are pruned when moved to the dispatch queue. So let the
-	 * completion_data share space with the rb_node.
-	 */
-	union {
-		struct rb_node rb_node;	/* sort/lookup */
-		struct bio_vec special_vec;
-		void *completion_data;
-		int error_count; /* for legacy drivers, don't use */
-	};
-
-	/*
-	 * Three pointers are available for the IO schedulers, if they need
-	 * more they have to dynamically allocate it.  Flush requests are
-	 * never put on the IO scheduler. So let the flush fields share
-	 * space with the elevator data.
-	 */
-	union {
-		struct {
-			struct io_cq		*icq;
-			void			*priv[2];
-		} elv;
-
-		struct {
-			unsigned int		seq;
-			struct list_head	list;
-			rq_end_io_fn		*saved_end_io;
-		} flush;
-	};
-
-	struct gendisk *rq_disk;
-	struct block_device *part;
-#ifdef CONFIG_BLK_RQ_ALLOC_TIME
-	/* Time that the first bio started allocating this request. */
-	u64 alloc_time_ns;
-#endif
-	/* Time that this request was allocated for this IO. */
-	u64 start_time_ns;
-	/* Time that I/O was submitted to the device. */
-	u64 io_start_time_ns;
-
-#ifdef CONFIG_BLK_WBT
-	unsigned short wbt_flags;
-#endif
-	/*
-	 * rq sectors used for blk stats. It has the same value
-	 * with blk_rq_sectors(rq), except that it never be zeroed
-	 * by completion.
-	 */
-	unsigned short stats_sectors;
-
-	/*
-	 * Number of scatter-gather DMA addr+len pairs after
-	 * physical address coalescing is performed.
-	 */
-	unsigned short nr_phys_segments;
-
-#if defined(CONFIG_BLK_DEV_INTEGRITY)
-	unsigned short nr_integrity_segments;
-#endif
-
-#ifdef CONFIG_BLK_INLINE_ENCRYPTION
-	struct bio_crypt_ctx *crypt_ctx;
-	struct blk_ksm_keyslot *crypt_keyslot;
-#endif
-
-	unsigned short write_hint;
-	unsigned short ioprio;
-
-	enum mq_rq_state state;
-	refcount_t ref;
-
-	unsigned int timeout;
-	unsigned long deadline;
-
-	union {
-		struct __call_single_data csd;
-		u64 fifo_time;
-	};
-
-	/*
-	 * completion callback.
-	 */
-	rq_end_io_fn *end_io;
-	void *end_io_data;
-};
-
 static inline bool blk_op_is_passthrough(unsigned int op)
 {
 	op &= REQ_OP_MASK;
 	return op == REQ_OP_DRV_IN || op == REQ_OP_DRV_OUT;
 }
 
-static inline bool blk_rq_is_passthrough(struct request *rq)
-{
-	return blk_op_is_passthrough(req_op(rq));
-}
-
-static inline unsigned short req_get_ioprio(struct request *req)
-{
-	return req->ioprio;
-}
-
-struct bio_vec;
-
-enum blk_eh_timer_return {
-	BLK_EH_DONE,		/* drivers has completed the command */
-	BLK_EH_RESET_TIMER,	/* reset timer and try again */
-};
-
-#define BLK_TAG_ALLOC_FIFO 0 /* allocate starting from 0 */
-#define BLK_TAG_ALLOC_RR 1 /* allocate starting from last allocated tag */
-
 /*
  * Zoned block device models (zoned limit).
  *
@@ -620,11 +415,6 @@ extern void blk_clear_pm_only(struct request_queue *q);
 
 #define list_entry_rq(ptr)	list_entry((ptr), struct request, queuelist)
 
-#define rq_data_dir(rq)		(op_is_write(req_op(rq)) ? WRITE : READ)
-
-#define rq_dma_dir(rq) \
-	(op_is_write(req_op(rq)) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
-
 #define dma_map_bvec(dev, bv, dir, attrs) \
 	dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \
 	(dir), (attrs))
@@ -740,11 +530,6 @@ static inline unsigned int queue_max_active_zones(const struct request_queue *q)
 }
 #endif /* CONFIG_BLK_DEV_ZONED */
 
-static inline bool rq_is_sync(struct request *rq)
-{
-	return op_is_sync(rq->cmd_flags);
-}
-
 static inline unsigned int blk_queue_depth(struct request_queue *q)
 {
 	if (q->queue_depth)
@@ -759,83 +544,20 @@ static inline unsigned int blk_queue_depth(struct request_queue *q)
 #define BLK_DEFAULT_SG_TIMEOUT	(60 * HZ)
 #define BLK_MIN_SG_TIMEOUT	(7 * HZ)
 
-struct rq_map_data {
-	struct page **pages;
-	int page_order;
-	int nr_entries;
-	unsigned long offset;
-	int null_mapped;
-	int from_user;
-};
-
-struct req_iterator {
-	struct bvec_iter iter;
-	struct bio *bio;
-};
-
 /* This should not be used directly - use rq_for_each_segment */
 #define for_each_bio(_bio)		\
 	for (; _bio; _bio = _bio->bi_next)
-#define __rq_for_each_bio(_bio, rq)	\
-	if ((rq->bio))			\
-		for (_bio = (rq)->bio; _bio; _bio = _bio->bi_next)
-
-#define rq_for_each_segment(bvl, _rq, _iter)			\
-	__rq_for_each_bio(_iter.bio, _rq)			\
-		bio_for_each_segment(bvl, _iter.bio, _iter.iter)
 
-#define rq_for_each_bvec(bvl, _rq, _iter)			\
-	__rq_for_each_bio(_iter.bio, _rq)			\
-		bio_for_each_bvec(bvl, _iter.bio, _iter.iter)
-
-#define rq_iter_last(bvec, _iter)				\
-		(_iter.bio->bi_next == NULL &&			\
-		 bio_iter_last(bvec, _iter.iter))
-
-#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
-# error	"You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform"
-#endif
-#if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
-extern void rq_flush_dcache_pages(struct request *rq);
-#else
-static inline void rq_flush_dcache_pages(struct request *rq)
-{
-}
-#endif
 
 extern int blk_register_queue(struct gendisk *disk);
 extern void blk_unregister_queue(struct gendisk *disk);
 blk_qc_t submit_bio_noacct(struct bio *bio);
-extern void blk_rq_init(struct request_queue *q, struct request *rq);
-extern void blk_put_request(struct request *);
-extern struct request *blk_get_request(struct request_queue *, unsigned int op,
-				       blk_mq_req_flags_t flags);
+
 extern int blk_lld_busy(struct request_queue *q);
-extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
-			     struct bio_set *bs, gfp_t gfp_mask,
-			     int (*bio_ctr)(struct bio *, struct bio *, void *),
-			     void *data);
-extern void blk_rq_unprep_clone(struct request *rq);
-extern blk_status_t blk_insert_cloned_request(struct request_queue *q,
-				     struct request *rq);
-int blk_rq_append_bio(struct request *rq, struct bio *bio);
 extern void blk_queue_split(struct bio **);
 extern int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags);
 extern void blk_queue_exit(struct request_queue *q);
 extern void blk_sync_queue(struct request_queue *q);
-extern int blk_rq_map_user(struct request_queue *, struct request *,
-			   struct rq_map_data *, void __user *, unsigned long,
-			   gfp_t);
-extern int blk_rq_unmap_user(struct bio *);
-extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, unsigned int, gfp_t);
-extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
-			       struct rq_map_data *, const struct iov_iter *,
-			       gfp_t);
-extern void blk_execute_rq_nowait(struct gendisk *,
-				  struct request *, int, rq_end_io_fn *);
-
-blk_status_t blk_execute_rq(struct gendisk *bd_disk, struct request *rq,
-			    int at_head);
 
 /* Helper to convert REQ_OP_XXX to its string format XXX */
 extern const char *blk_op_str(unsigned int op);
@@ -867,47 +589,6 @@ static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
 #define PAGE_SECTORS		(1 << PAGE_SECTORS_SHIFT)
 #define SECTOR_MASK		(PAGE_SECTORS - 1)
 
-/*
- * blk_rq_pos()			: the current sector
- * blk_rq_bytes()		: bytes left in the entire request
- * blk_rq_cur_bytes()		: bytes left in the current segment
- * blk_rq_err_bytes()		: bytes left till the next error boundary
- * blk_rq_sectors()		: sectors left in the entire request
- * blk_rq_cur_sectors()		: sectors left in the current segment
- * blk_rq_stats_sectors()	: sectors of the entire request used for stats
- */
-static inline sector_t blk_rq_pos(const struct request *rq)
-{
-	return rq->__sector;
-}
-
-static inline unsigned int blk_rq_bytes(const struct request *rq)
-{
-	return rq->__data_len;
-}
-
-static inline int blk_rq_cur_bytes(const struct request *rq)
-{
-	return rq->bio ? bio_cur_bytes(rq->bio) : 0;
-}
-
-extern unsigned int blk_rq_err_bytes(const struct request *rq);
-
-static inline unsigned int blk_rq_sectors(const struct request *rq)
-{
-	return blk_rq_bytes(rq) >> SECTOR_SHIFT;
-}
-
-static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
-{
-	return blk_rq_cur_bytes(rq) >> SECTOR_SHIFT;
-}
-
-static inline unsigned int blk_rq_stats_sectors(const struct request *rq)
-{
-	return rq->stats_sectors;
-}
-
 #ifdef CONFIG_BLK_DEV_ZONED
 
 /* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */
@@ -924,42 +605,8 @@ static inline unsigned int bio_zone_is_seq(struct bio *bio)
 	return blk_queue_zone_is_seq(bdev_get_queue(bio->bi_bdev),
 				     bio->bi_iter.bi_sector);
 }
-
-static inline unsigned int blk_rq_zone_no(struct request *rq)
-{
-	return blk_queue_zone_no(rq->q, blk_rq_pos(rq));
-}
-
-static inline unsigned int blk_rq_zone_is_seq(struct request *rq)
-{
-	return blk_queue_zone_is_seq(rq->q, blk_rq_pos(rq));
-}
 #endif /* CONFIG_BLK_DEV_ZONED */
 
-/*
- * Some commands like WRITE SAME have a payload or data transfer size which
- * is different from the size of the request.  Any driver that supports such
- * commands using the RQF_SPECIAL_PAYLOAD flag needs to use this helper to
- * calculate the data transfer size.
- */
-static inline unsigned int blk_rq_payload_bytes(struct request *rq)
-{
-	if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
-		return rq->special_vec.bv_len;
-	return blk_rq_bytes(rq);
-}
-
-/*
- * Return the first full biovec in the request.  The caller needs to check that
- * there are any bvecs before calling this helper.
- */
-static inline struct bio_vec req_bvec(struct request *rq)
-{
-	if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
-		return rq->special_vec;
-	return mp_bvec_iter_bvec(rq->bio->bi_io_vec, rq->bio->bi_iter);
-}
-
 static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
 						     int op)
 {
@@ -999,30 +646,6 @@ static inline unsigned int blk_max_size_offset(struct request_queue *q,
 	return min(q->limits.max_sectors, chunk_sectors);
 }
 
-static inline unsigned int blk_rq_count_bios(struct request *rq)
-{
-	unsigned int nr_bios = 0;
-	struct bio *bio;
-
-	__rq_for_each_bio(bio, rq)
-		nr_bios++;
-
-	return nr_bios;
-}
-
-void blk_steal_bios(struct bio_list *list, struct request *rq);
-
-/*
- * Request completion related functions.
- *
- * blk_update_request() completes given number of bytes and updates
- * the request without completing it.
- */
-extern bool blk_update_request(struct request *rq, blk_status_t error,
-			       unsigned int nr_bytes);
-
-extern void blk_abort_request(struct request *);
-
 /*
  * Access functions for manipulating queue properties
  */
@@ -1081,42 +704,6 @@ extern void blk_queue_required_elevator_features(struct request_queue *q,
 extern bool blk_queue_can_use_dma_map_merging(struct request_queue *q,
 					      struct device *dev);
 
-/*
- * Number of physical segments as sent to the device.
- *
- * Normally this is the number of discontiguous data segments sent by the
- * submitter.  But for data-less command like discard we might have no
- * actual data segments submitted, but the driver might have to add it's
- * own special payload.  In that case we still return 1 here so that this
- * special payload will be mapped.
- */
-static inline unsigned short blk_rq_nr_phys_segments(struct request *rq)
-{
-	if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
-		return 1;
-	return rq->nr_phys_segments;
-}
-
-/*
- * Number of discard segments (or ranges) the driver needs to fill in.
- * Each discard bio merged into a request is counted as one segment.
- */
-static inline unsigned short blk_rq_nr_discard_segments(struct request *rq)
-{
-	return max_t(unsigned short, rq->nr_phys_segments, 1);
-}
-
-int __blk_rq_map_sg(struct request_queue *q, struct request *rq,
-		struct scatterlist *sglist, struct scatterlist **last_sg);
-static inline int blk_rq_map_sg(struct request_queue *q, struct request *rq,
-		struct scatterlist *sglist)
-{
-	struct scatterlist *last_sg = NULL;
-
-	return __blk_rq_map_sg(q, rq, sglist, &last_sg);
-}
-extern void blk_dump_rq_flags(struct request *, char *);
-
 bool __must_check blk_get_queue(struct request_queue *);
 extern void blk_put_queue(struct request_queue *);
 extern void blk_set_queue_dying(struct request_queue *);
@@ -1613,60 +1200,6 @@ extern int bdev_read_page(struct block_device *, sector_t, struct page *);
 extern int bdev_write_page(struct block_device *, sector_t, struct page *,
 						struct writeback_control *);
 
-#ifdef CONFIG_BLK_DEV_ZONED
-bool blk_req_needs_zone_write_lock(struct request *rq);
-bool blk_req_zone_write_trylock(struct request *rq);
-void __blk_req_zone_write_lock(struct request *rq);
-void __blk_req_zone_write_unlock(struct request *rq);
-
-static inline void blk_req_zone_write_lock(struct request *rq)
-{
-	if (blk_req_needs_zone_write_lock(rq))
-		__blk_req_zone_write_lock(rq);
-}
-
-static inline void blk_req_zone_write_unlock(struct request *rq)
-{
-	if (rq->rq_flags & RQF_ZONE_WRITE_LOCKED)
-		__blk_req_zone_write_unlock(rq);
-}
-
-static inline bool blk_req_zone_is_write_locked(struct request *rq)
-{
-	return rq->q->seq_zones_wlock &&
-		test_bit(blk_rq_zone_no(rq), rq->q->seq_zones_wlock);
-}
-
-static inline bool blk_req_can_dispatch_to_zone(struct request *rq)
-{
-	if (!blk_req_needs_zone_write_lock(rq))
-		return true;
-	return !blk_req_zone_is_write_locked(rq);
-}
-#else
-static inline bool blk_req_needs_zone_write_lock(struct request *rq)
-{
-	return false;
-}
-
-static inline void blk_req_zone_write_lock(struct request *rq)
-{
-}
-
-static inline void blk_req_zone_write_unlock(struct request *rq)
-{
-}
-static inline bool blk_req_zone_is_write_locked(struct request *rq)
-{
-	return false;
-}
-
-static inline bool blk_req_can_dispatch_to_zone(struct request *rq)
-{
-	return true;
-}
-#endif /* CONFIG_BLK_DEV_ZONED */
-
 static inline void blk_wake_io_task(struct task_struct *waiter)
 {
 	/*
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index a083e15df6087..22501a293fa54 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -2,7 +2,7 @@
 #ifndef BLKTRACE_H
 #define BLKTRACE_H
 
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/relay.h>
 #include <linux/compat.h>
 #include <uapi/linux/blktrace_api.h>
diff --git a/include/linux/t10-pi.h b/include/linux/t10-pi.h
index 96305a64a5a7b..c635c2e014e3d 100644
--- a/include/linux/t10-pi.h
+++ b/include/linux/t10-pi.h
@@ -3,7 +3,7 @@
 #define _LINUX_T10_PI_H
 
 #include <linux/types.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 
 /*
  * A T10 PI-capable target device can be formatted with different
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 09a17f6e93a79..76d9ee98f6c15 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -5,7 +5,7 @@
 #include <linux/list.h>
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <scsi/scsi.h>
 #include <linux/atomic.h>
 #include <linux/sbitmap.h>
-- 
2.30.2

Re: [PATCH 01/17] mm: don't include <linux/blk-cgroup.h> in <linux/writeback.h>

[Johannes Thumshirn]

Looks good,
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Re: [PATCH 03/17] mm: don't include <linux/blkdev.h> in <linux/backing-dev.h>

[Johannes Thumshirn]

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Re: [PATCH 08/17] block: remove the unused rq_end_sector macro

[Johannes Thumshirn]

So long...
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Re: [PATCH 09/17] block: remove the unused blk_queue_state enum

[Johannes Thumshirn]

Looks good,
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Re: [PATCH 10/17] block: remove the cmd_size field from struct request_queue

[Johannes Thumshirn]

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Re: [PATCH 11/17] block: remove the struct blk_queue_ctx forward declaration

[Johannes Thumshirn]

Looks good,
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Re: [PATCH 12/17] block: move elevator.h to block/

[Johannes Thumshirn]

Looks good,
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Re: [PATCH 01/17] mm: don't include <linux/blk-cgroup.h> in <linux/writeback.h>

[Bart Van Assche]

On 9/20/21 5:33 AM, Christoph Hellwig wrote:
> -static inline struct cgroup_subsys_state *
> -wbc_blkcg_css(struct writeback_control *wbc)
> -{
>   #ifdef CONFIG_CGROUP_WRITEBACK
> -	if (wbc->wb)
> -		return wbc->wb->blkcg_css;
> -#endif
> -	return blkcg_root_css;
> -}
> +#define wbc_blkcg_css(wbc) \
> +	((wbc)->wb ? (wbc)->wb->blkcg_css : blkcg_root_css)
> +#else
> +#define wbc_blkcg_css(wbc)		(blkcg_root_css)
> +#endif /* CONFIG_CGROUP_WRITEBACK */

This change may introduce annoying set-but-not-used warnings
with CONFIG_CGROUP_WRITEBACK=n. How about changing (blkcg_root_css)
into ((wbc), blkcg_root_css) to prevent this?

Thanks,

Bart.

Re: [PATCH 01/17] mm: don't include <linux/blk-cgroup.h> in <linux/writeback.h>

[Christoph Hellwig]

On Mon, Sep 20, 2021 at 03:13:15PM -0700, Bart Van Assche wrote:
>> +#define wbc_blkcg_css(wbc) \
>> +	((wbc)->wb ? (wbc)->wb->blkcg_css : blkcg_root_css)
>> +#else
>> +#define wbc_blkcg_css(wbc)		(blkcg_root_css)
>> +#endif /* CONFIG_CGROUP_WRITEBACK */
>
> This change may introduce annoying set-but-not-used warnings
> with CONFIG_CGROUP_WRITEBACK=n. How about changing (blkcg_root_css)
> into ((wbc), blkcg_root_css) to prevent this?

I agree in principle, but in this case the caller pretty much has
to use wbc in other ways, so I don't think it matters much.

Re: untangle the block headers v2

[Jens Axboe]

On 9/20/21 6:33 AM, Christoph Hellwig wrote:
> Hi Jens,
> 
> this series untangles the worst of the block header maze.  It removes
> various includes from blkdev.h and genhd.h, and also ensures the
> writeback code doesn't pull in blkdev.h leading to huge rebuilds
> whenever they change.  Finally it moves various bits out of blkdev.h
> which shouldn't be in the general block layer header.
> 
> It has surived various randomconfig builds from me and the buildbot,
> but I suspect there are a few more conditionally missing headers
> that will emerge later for more oscure configs, so it would be great
> to get this merged early.

Applied, thanks.

-- 
Jens Axboe

[PATCH 14/17] block: drop unused includes in <linux/genhd.h>

[Christoph Hellwig]

Drop various include not actually used in genhd.h itself, and
move the remaning includes closer together.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/um/drivers/ubd_kern.c      |  1 +
 block/genhd.c                   |  1 +
 block/holder.c                  |  1 +
 block/partitions/core.c         |  1 +
 drivers/block/amiflop.c         |  1 +
 drivers/block/ataflop.c         |  1 +
 drivers/block/floppy.c          |  1 +
 drivers/block/swim.c            |  1 +
 drivers/block/xen-blkfront.c    |  1 +
 drivers/md/md.c                 |  1 +
 drivers/s390/block/dasd_genhd.c |  1 +
 drivers/scsi/sd.c               |  1 +
 drivers/scsi/sg.c               |  1 +
 drivers/scsi/sr.c               |  1 +
 drivers/scsi/st.c               |  1 +
 include/linux/genhd.h           | 14 ++------------
 include/linux/part_stat.h       |  1 +
 17 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index cd9dc0556e913..4352ef3ea7e04 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -27,6 +27,7 @@
 #include <linux/blk-mq.h>
 #include <linux/ata.h>
 #include <linux/hdreg.h>
+#include <linux/kernel.h>
 #include <linux/cdrom.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
diff --git a/block/genhd.c b/block/genhd.c
index 7b6e5e1cf9564..5e8aa0ab66c2a 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -19,6 +19,7 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/kmod.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/idr.h>
 #include <linux/log2.h>
diff --git a/block/holder.c b/block/holder.c
index 9dc084182337f..27cddce1b4461 100644
--- a/block/holder.c
+++ b/block/holder.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 #include <linux/genhd.h>
+#include <linux/slab.h>
 
 struct bd_holder_disk {
 	struct list_head	list;
diff --git a/block/partitions/core.c b/block/partitions/core.c
index 58c4c362c94f9..3a4898433c434 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2020 Christoph Hellwig
  */
 #include <linux/fs.h>
+#include <linux/major.h>
 #include <linux/slab.h>
 #include <linux/ctype.h>
 #include <linux/genhd.h>
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index b892e5185d6fa..2909fd9e72fb8 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -61,6 +61,7 @@
 #include <linux/hdreg.h>
 #include <linux/delay.h>
 #include <linux/init.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/fs.h>
 #include <linux/blk-mq.h>
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index a093644ac39fb..58e921ab57298 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -68,6 +68,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/blk-mq.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/completion.h>
 #include <linux/wait.h>
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index fef79ea52e3ed..6288ce8884147 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -184,6 +184,7 @@ static int print_unex = 1;
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
+#include <linux/major.h>
 #include <linux/platform_device.h>
 #include <linux/mod_devicetable.h>
 #include <linux/mutex.h>
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index 7ccc8d2a41bc6..3911d0833e1b9 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -16,6 +16,7 @@
 #include <linux/fd.h>
 #include <linux/slab.h>
 #include <linux/blk-mq.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/hdreg.h>
 #include <linux/kernel.h>
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 72902104f1112..df0deb9277601 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -42,6 +42,7 @@
 #include <linux/cdrom.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/scatterlist.h>
 #include <linux/bitmap.h>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index ae8fe54ea3581..0c7018462eaee 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -51,6 +51,7 @@
 #include <linux/hdreg.h>
 #include <linux/proc_fs.h>
 #include <linux/random.h>
+#include <linux/major.h>
 #include <linux/module.h>
 #include <linux/reboot.h>
 #include <linux/file.h>
diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index fa966e0db6ca9..3a6f3af240fa7 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -14,6 +14,7 @@
 #define KMSG_COMPONENT "dasd"
 
 #include <linux/interrupt.h>
+#include <linux/major.h>
 #include <linux/fs.h>
 #include <linux/blkpg.h>
 
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index cbd9999f93a6b..a18ae0950c491 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -48,6 +48,7 @@
 #include <linux/blkpg.h>
 #include <linux/blk-pm.h>
 #include <linux/delay.h>
+#include <linux/major.h>
 #include <linux/mutex.h>
 #include <linux/string_helpers.h>
 #include <linux/async.h>
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 8f05248920e8e..3c98f08dc25d9 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -31,6 +31,7 @@ static int sg_version_num = 30536;	/* 2 digits for each component */
 #include <linux/errno.h>
 #include <linux/mtio.h>
 #include <linux/ioctl.h>
+#include <linux/major.h>
 #include <linux/slab.h>
 #include <linux/fcntl.h>
 #include <linux/init.h>
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 8b17b35283aa5..115f7ef7a5def 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -44,6 +44,7 @@
 #include <linux/cdrom.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
+#include <linux/major.h>
 #include <linux/blkdev.h>
 #include <linux/blk-pm.h>
 #include <linux/mutex.h>
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 9d04929f03a10..8cc02f5264ba7 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -32,6 +32,7 @@ static const char *verstr = "20160209";
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/mtio.h>
+#include <linux/major.h>
 #include <linux/cdrom.h>
 #include <linux/ioctl.h>
 #include <linux/fcntl.h>
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index c68d83c87f83f..c1639c16b74c3 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -12,12 +12,10 @@
 
 #include <linux/types.h>
 #include <linux/kdev_t.h>
-#include <linux/rcupdate.h>
-#include <linux/slab.h>
-#include <linux/percpu-refcount.h>
 #include <linux/uuid.h>
 #include <linux/blk_types.h>
-#include <asm/local.h>
+#include <linux/device.h>
+#include <linux/xarray.h>
 
 extern const struct device_type disk_type;
 extern struct device_type part_type;
@@ -26,14 +24,6 @@ extern struct class block_class;
 #define DISK_MAX_PARTS			256
 #define DISK_NAME_LEN			32
 
-#include <linux/major.h>
-#include <linux/device.h>
-#include <linux/smp.h>
-#include <linux/string.h>
-#include <linux/fs.h>
-#include <linux/workqueue.h>
-#include <linux/xarray.h>
-
 #define PARTITION_META_INFO_VOLNAMELTH	64
 /*
  * Enough for the string representation of any kind of UUID plus NULL.
diff --git a/include/linux/part_stat.h b/include/linux/part_stat.h
index d2558121d48c0..6f7949b2fd8dc 100644
--- a/include/linux/part_stat.h
+++ b/include/linux/part_stat.h
@@ -3,6 +3,7 @@
 #define _LINUX_PART_STAT_H
 
 #include <linux/genhd.h>
+#include <asm/local.h>
 
 struct disk_stats {
 	u64 nsecs[NR_STAT_GROUPS];
-- 
2.30.2