block: move struct request to blk-mq.h

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>
Link: https://lore.kernel.org/r/20210920123328.1399408-18-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

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"
 

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 {

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>

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"
 

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>

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>
 

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>
 

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,

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>

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

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>