10 files changed, 100 insertions, 281 deletions

diff --git a/include/linux/bio.h b/include/linux/bio.h
index 7b214fd672a2..d30ec6f30dd7 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -218,12 +218,12 @@ struct bio {
 #define bio_sectors(bio)        ((bio)->bi_size >> 9)
 #define bio_empty_barrier(bio)  (bio_barrier(bio) && !bio_has_data(bio) && !bio_discard(bio))
 
-static inline unsigned int bio_cur_sectors(struct bio *bio)
+static inline unsigned int bio_cur_bytes(struct bio *bio)
 {
         if (bio->bi_vcnt)
-                return bio_iovec(bio)->bv_len >> 9;
+                return bio_iovec(bio)->bv_len;
         else /* dataless requests such as discard */
-                return bio->bi_size >> 9;
+                return bio->bi_size;
 }
 
 static inline void *bio_data(struct bio *bio)
@@ -506,7 +506,7 @@ static inline int bio_has_data(struct bio *bio)
 }
 
 /*
- * BIO list managment for use by remapping drivers (e.g. DM or MD).
+ * BIO list management for use by remapping drivers (e.g. DM or MD) and loop.
  *
  * A bio_list anchors a singly-linked list of bios chained through the bi_next
  * member of the bio.  The bio_list also caches the last list member to allow
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b4f71f1a4af7..56ce53fce72e 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -166,19 +166,9 @@ struct request {
         enum rq_cmd_type_bits cmd_type;
         unsigned long atomic_flags;
 
-        /* Maintain bio traversal state for part by part I/O submission.
-         * hard_* are block layer internals, no driver should touch them!
-         */
-
-        sector_t sector;                /* next sector to submit */
-        sector_t hard_sector;           /* next sector to complete */
-        unsigned long nr_sectors;       /* no. of sectors left to submit */
-        unsigned long hard_nr_sectors;  /* no. of sectors left to complete */
-        /* no. of sectors left to submit in the current segment */
-        unsigned int current_nr_sectors;
-
-        /* no. of sectors left to complete in the current segment */
-        unsigned int hard_cur_sectors;
+        /* the following two fields are internal, NEVER access directly */
+        sector_t __sector;              /* sector cursor */
+        unsigned int __data_len;        /* total data len */
 
         struct bio *bio;
         struct bio *biotail;
@@ -211,8 +201,8 @@ struct request {
 
         unsigned short ioprio;
 
-        void *special;
-        char *buffer;
+        void *special;          /* opaque pointer available for LLD use */
+        char *buffer;           /* kaddr of the current segment if available */
 
         int tag;
         int errors;
@@ -226,10 +216,9 @@ struct request {
         unsigned char __cmd[BLK_MAX_CDB];
         unsigned char *cmd;
 
-        unsigned int data_len;
         unsigned int extra_len; /* length of alignment and padding */
         unsigned int sense_len;
-        void *data;
+        unsigned int resid_len; /* residual count */
         void *sense;
 
         unsigned long deadline;
@@ -415,7 +404,7 @@ struct request_queue
         struct list_head        tag_busy_list;
 
         unsigned int            nr_sorted;
-        unsigned int            in_flight;
+        unsigned int            in_flight[2];
 
         unsigned int            rq_timeout;
         struct timer_list       timeout;
@@ -522,6 +511,11 @@ static inline void queue_flag_clear_unlocked(unsigned int flag,
         __clear_bit(flag, &q->queue_flags);
 }
 
+static inline int queue_in_flight(struct request_queue *q)
+{
+        return q->in_flight[0] + q->in_flight[1];
+}
+
 static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
 {
         WARN_ON_ONCE(!queue_is_locked(q));
@@ -752,6 +746,8 @@ extern void blk_rq_init(struct request_queue *q, struct request *rq);
 extern void blk_put_request(struct request *);
 extern void __blk_put_request(struct request_queue *, struct request *);
 extern struct request *blk_get_request(struct request_queue *, int, gfp_t);
+extern struct request *blk_make_request(struct request_queue *, struct bio *,
+                                        gfp_t);
 extern void blk_insert_request(struct request_queue *, struct request *, int, void *);
 extern void blk_requeue_request(struct request_queue *, struct request *);
 extern int blk_rq_check_limits(struct request_queue *q, struct request *rq);
@@ -768,12 +764,6 @@ extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
                          struct scsi_ioctl_command __user *);
 
 /*
- * Temporary export, until SCSI gets fixed up.
- */
-extern int blk_rq_append_bio(struct request_queue *q, struct request *rq,
-                             struct bio *bio);
-
-/*
  * A queue has just exitted congestion.  Note this in the global counter of
  * congested queues, and wake up anyone who was waiting for requests to be
  * put back.
@@ -798,7 +788,6 @@ extern void blk_sync_queue(struct request_queue *q);
 extern void __blk_stop_queue(struct request_queue *q);
 extern void __blk_run_queue(struct request_queue *);
 extern void blk_run_queue(struct request_queue *);
-extern void blk_start_queueing(struct request_queue *);
 extern int blk_rq_map_user(struct request_queue *, struct request *,
                            struct rq_map_data *, void __user *, unsigned long,
                            gfp_t);
@@ -831,41 +820,73 @@ static inline void blk_run_address_space(struct address_space *mapping)
                 blk_run_backing_dev(mapping->backing_dev_info, NULL);
 }
 
-extern void blkdev_dequeue_request(struct request *req);
+/*
+ * 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_sectors()     : sectors left in the entire request
+ * blk_rq_cur_sectors() : sectors left in the current segment
+ */
+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;
+}
+
+static inline unsigned int blk_rq_sectors(const struct request *rq)
+{
+        return blk_rq_bytes(rq) >> 9;
+}
+
+static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
+{
+        return blk_rq_cur_bytes(rq) >> 9;
+}
+
+/*
+ * Request issue related functions.
+ */
+extern struct request *blk_peek_request(struct request_queue *q);
+extern void blk_start_request(struct request *rq);
+extern struct request *blk_fetch_request(struct request_queue *q);
 
 /*
- * blk_end_request() and friends.
- * __blk_end_request() and end_request() must be called with
- * the request queue spinlock acquired.
+ * Request completion related functions.
+ *
+ * blk_update_request() completes given number of bytes and updates
+ * the request without completing it.
+ *
+ * blk_end_request() and friends.  __blk_end_request() must be called
+ * with the request queue spinlock acquired.
  *
  * Several drivers define their own end_request and call
  * blk_end_request() for parts of the original function.
  * This prevents code duplication in drivers.
  */
-extern int blk_end_request(struct request *rq, int error,
-                                unsigned int nr_bytes);
-extern int __blk_end_request(struct request *rq, int error,
-                                unsigned int nr_bytes);
-extern int blk_end_bidi_request(struct request *rq, int error,
-                                unsigned int nr_bytes, unsigned int bidi_bytes);
-extern void end_request(struct request *, int);
-extern int blk_end_request_callback(struct request *rq, int error,
-                                unsigned int nr_bytes,
-                                int (drv_callback)(struct request *));
+extern bool blk_update_request(struct request *rq, int error,
+                               unsigned int nr_bytes);
+extern bool blk_end_request(struct request *rq, int error,
+                            unsigned int nr_bytes);
+extern void blk_end_request_all(struct request *rq, int error);
+extern bool blk_end_request_cur(struct request *rq, int error);
+extern bool __blk_end_request(struct request *rq, int error,
+                              unsigned int nr_bytes);
+extern void __blk_end_request_all(struct request *rq, int error);
+extern bool __blk_end_request_cur(struct request *rq, int error);
+
 extern void blk_complete_request(struct request *);
 extern void __blk_complete_request(struct request *);
 extern void blk_abort_request(struct request *);
 extern void blk_abort_queue(struct request_queue *);
-extern void blk_update_request(struct request *rq, int error,
-                               unsigned int nr_bytes);
-
-/*
- * blk_end_request() takes bytes instead of sectors as a complete size.
- * blk_rq_bytes() returns bytes left to complete in the entire request.
- * blk_rq_cur_bytes() returns bytes left to complete in the current segment.
- */
-extern unsigned int blk_rq_bytes(struct request *rq);
-extern unsigned int blk_rq_cur_bytes(struct request *rq);
 
 /*
  * Access functions for manipulating queue properties
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index c59b769f62b0..1cb3372e65d8 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -103,10 +103,8 @@ extern int elv_merge(struct request_queue *, struct request **, struct bio *);
 extern void elv_merge_requests(struct request_queue *, struct request *,
                                struct request *);
 extern void elv_merged_request(struct request_queue *, struct request *, int);
-extern void elv_dequeue_request(struct request_queue *, struct request *);
 extern void elv_requeue_request(struct request_queue *, struct request *);
 extern int elv_queue_empty(struct request_queue *);
-extern struct request *elv_next_request(struct request_queue *q);
 extern struct request *elv_former_request(struct request_queue *, struct request *);
 extern struct request *elv_latter_request(struct request_queue *, struct request *);
 extern int elv_register_queue(struct request_queue *q);
@@ -171,7 +169,7 @@ enum {
         ELV_MQUEUE_MUST,
 };
 
-#define rq_end_sector(rq)       ((rq)->sector + (rq)->nr_sectors)
+#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)
 
 /*
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3b534e527e09..83d6b4397245 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2205,6 +2205,8 @@ extern int generic_segment_checks(const struct iovec *iov,
 /* fs/splice.c */
 extern ssize_t generic_file_splice_read(struct file *, loff_t *,
                 struct pipe_inode_info *, size_t, unsigned int);
+extern ssize_t default_file_splice_read(struct file *, loff_t *,
+                struct pipe_inode_info *, size_t, unsigned int);
 extern ssize_t generic_file_splice_write(struct pipe_inode_info *,
                 struct file *, loff_t *, size_t, unsigned int);
 extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 9fed365a598b..867cb68d8461 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -26,6 +26,9 @@
 #include <asm/io.h>
 #include <asm/mutex.h>
 
+/* for request_sense */
+#include <linux/cdrom.h>
+
 #if defined(CONFIG_CRIS) || defined(CONFIG_FRV) || defined(CONFIG_MN10300)
 # define SUPPORT_VLB_SYNC 0
 #else
@@ -324,7 +327,6 @@ struct ide_cmd {
         unsigned int            cursg_ofs;
 
         struct request          *rq;            /* copy of request */
-        void                    *special;       /* valid_t generally */
 };
 
 /* ATAPI packet command flags */
@@ -360,11 +362,7 @@ struct ide_atapi_pc {
 
         /* data buffer */
         u8 *buf;
-        /* current buffer position */
-        u8 *cur_pos;
         int buf_size;
-        /* missing/available data on the current buffer */
-        int b_count;
 
         /* the corresponding request */
         struct request *rq;
@@ -377,10 +375,6 @@ struct ide_atapi_pc {
          */
         u8 pc_buf[IDE_PC_BUFFER_SIZE];
 
-        /* idetape only */
-        struct idetape_bh *bh;
-        char *b_data;
-
         unsigned long timeout;
 };
 
@@ -593,16 +587,16 @@ struct ide_drive_s {
         /* callback for packet commands */
         int  (*pc_callback)(struct ide_drive_s *, int);
 
-        void (*pc_update_buffers)(struct ide_drive_s *, struct ide_atapi_pc *);
-        int  (*pc_io_buffers)(struct ide_drive_s *, struct ide_atapi_pc *,
-                              unsigned int, int);
-
         ide_startstop_t (*irq_handler)(struct ide_drive_s *);
 
         unsigned long atapi_flags;
 
         struct ide_atapi_pc request_sense_pc;
-        struct request request_sense_rq;
+
+        /* current sense rq and buffer */
+        bool sense_rq_armed;
+        struct request sense_rq;
+        struct request_sense sense_data;
 };
 
 typedef struct ide_drive_s ide_drive_t;
@@ -1174,7 +1168,10 @@ int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
 int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
 int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
 void ide_create_request_sense_cmd(ide_drive_t *, struct ide_atapi_pc *);
-void ide_retry_pc(ide_drive_t *, struct gendisk *);
+void ide_retry_pc(ide_drive_t *drive);
+
+void ide_prep_sense(ide_drive_t *drive, struct request *rq);
+int ide_queue_sense_rq(ide_drive_t *drive, void *special);
 
 int ide_cd_expiry(ide_drive_t *);
 
diff --git a/include/linux/loop.h b/include/linux/loop.h
index 40725447f5e0..66c194e2d9b9 100644
--- a/include/linux/loop.h
+++ b/include/linux/loop.h
@@ -56,8 +56,7 @@ struct loop_device {
         gfp_t           old_gfp_mask;
 
         spinlock_t              lo_lock;
-        struct bio              *lo_bio;
-        struct bio              *lo_biotail;
+        struct bio_list         lo_bio_list;
         int                     lo_state;
         struct mutex            lo_ctl_mutex;
         struct task_struct      *lo_thread;
diff --git a/include/linux/mg_disk.h b/include/linux/mg_disk.h
deleted file mode 100644
index 1f76b1ebf627..000000000000
--- a/include/linux/mg_disk.h
+++ /dev/null
@@ -1,206 +0,0 @@
-/*
- *  include/linux/mg_disk.c
- *
- *  Support for the mGine m[g]flash IO mode.
- *  Based on legacy hd.c
- *
- * (c) 2008 mGine Co.,LTD
- * (c) 2008 unsik Kim <donari75@gmail.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 as
- *  published by the Free Software Foundation.
- */
-
-#ifndef __MG_DISK_H__
-#define __MG_DISK_H__
-
-#include <linux/blkdev.h>
-#include <linux/ata.h>
-
-/* name for block device */
-#define MG_DISK_NAME "mgd"
-/* name for platform device */
-#define MG_DEV_NAME "mg_disk"
-
-#define MG_DISK_MAJ 0
-#define MG_DISK_MAX_PART 16
-#define MG_SECTOR_SIZE 512
-#define MG_MAX_SECTS 256
-
-/* Register offsets */
-#define MG_BUFF_OFFSET                  0x8000
-#define MG_STORAGE_BUFFER_SIZE          0x200
-#define MG_REG_OFFSET                   0xC000
-#define MG_REG_FEATURE                  (MG_REG_OFFSET + 2)     /* write case */
-#define MG_REG_ERROR                    (MG_REG_OFFSET + 2)     /* read case */
-#define MG_REG_SECT_CNT                 (MG_REG_OFFSET + 4)
-#define MG_REG_SECT_NUM                 (MG_REG_OFFSET + 6)
-#define MG_REG_CYL_LOW                  (MG_REG_OFFSET + 8)
-#define MG_REG_CYL_HIGH                 (MG_REG_OFFSET + 0xA)
-#define MG_REG_DRV_HEAD                 (MG_REG_OFFSET + 0xC)
-#define MG_REG_COMMAND                  (MG_REG_OFFSET + 0xE)   /* write case */
-#define MG_REG_STATUS                   (MG_REG_OFFSET + 0xE)   /* read  case */
-#define MG_REG_DRV_CTRL                 (MG_REG_OFFSET + 0x10)
-#define MG_REG_BURST_CTRL               (MG_REG_OFFSET + 0x12)
-
-/* "Drive Select/Head Register" bit values */
-#define MG_REG_HEAD_MUST_BE_ON          0xA0 /* These 2 bits are always on */
-#define MG_REG_HEAD_DRIVE_MASTER        (0x00 | MG_REG_HEAD_MUST_BE_ON)
-#define MG_REG_HEAD_DRIVE_SLAVE         (0x10 | MG_REG_HEAD_MUST_BE_ON)
-#define MG_REG_HEAD_LBA_MODE            (0x40 | MG_REG_HEAD_MUST_BE_ON)
-
-
-/* "Device Control Register" bit values */
-#define MG_REG_CTRL_INTR_ENABLE                 0x0
-#define MG_REG_CTRL_INTR_DISABLE                (0x1<<1)
-#define MG_REG_CTRL_RESET                       (0x1<<2)
-#define MG_REG_CTRL_INTR_POLA_ACTIVE_HIGH       0x0
-#define MG_REG_CTRL_INTR_POLA_ACTIVE_LOW        (0x1<<4)
-#define MG_REG_CTRL_DPD_POLA_ACTIVE_LOW         0x0
-#define MG_REG_CTRL_DPD_POLA_ACTIVE_HIGH        (0x1<<5)
-#define MG_REG_CTRL_DPD_DISABLE                 0x0
-#define MG_REG_CTRL_DPD_ENABLE                  (0x1<<6)
-
-/* Status register bit */
-/* error bit in status register */
-#define MG_REG_STATUS_BIT_ERROR                 0x01
-/* corrected error in status register */
-#define MG_REG_STATUS_BIT_CORRECTED_ERROR       0x04
-/* data request bit in status register */
-#define MG_REG_STATUS_BIT_DATA_REQ              0x08
-/* DSC - Drive Seek Complete */
-#define MG_REG_STATUS_BIT_SEEK_DONE             0x10
-/* DWF - Drive Write Fault */
-#define MG_REG_STATUS_BIT_WRITE_FAULT           0x20
-#define MG_REG_STATUS_BIT_READY                 0x40
-#define MG_REG_STATUS_BIT_BUSY                  0x80
-
-/* handy status */
-#define MG_STAT_READY   (MG_REG_STATUS_BIT_READY | MG_REG_STATUS_BIT_SEEK_DONE)
-#define MG_READY_OK(s)  (((s) & (MG_STAT_READY | \
-                                (MG_REG_STATUS_BIT_BUSY | \
-                                 MG_REG_STATUS_BIT_WRITE_FAULT | \
-                                 MG_REG_STATUS_BIT_ERROR))) == MG_STAT_READY)
-
-/* Error register */
-#define MG_REG_ERR_AMNF         0x01
-#define MG_REG_ERR_ABRT         0x04
-#define MG_REG_ERR_IDNF         0x10
-#define MG_REG_ERR_UNC          0x40
-#define MG_REG_ERR_BBK          0x80
-
-/* error code for others */
-#define MG_ERR_NONE             0
-#define MG_ERR_TIMEOUT          0x100
-#define MG_ERR_INIT_STAT        0x101
-#define MG_ERR_TRANSLATION      0x102
-#define MG_ERR_CTRL_RST         0x103
-#define MG_ERR_INV_STAT         0x104
-#define MG_ERR_RSTOUT           0x105
-
-#define MG_MAX_ERRORS   6       /* Max read/write errors */
-
-/* command */
-#define MG_CMD_RD 0x20
-#define MG_CMD_WR 0x30
-#define MG_CMD_SLEEP 0x99
-#define MG_CMD_WAKEUP 0xC3
-#define MG_CMD_ID 0xEC
-#define MG_CMD_WR_CONF 0x3C
-#define MG_CMD_RD_CONF 0x40
-
-/* operation mode */
-#define MG_OP_CASCADE (1 << 0)
-#define MG_OP_CASCADE_SYNC_RD (1 << 1)
-#define MG_OP_CASCADE_SYNC_WR (1 << 2)
-#define MG_OP_INTERLEAVE (1 << 3)
-
-/* synchronous */
-#define MG_BURST_LAT_4 (3 << 4)
-#define MG_BURST_LAT_5 (4 << 4)
-#define MG_BURST_LAT_6 (5 << 4)
-#define MG_BURST_LAT_7 (6 << 4)
-#define MG_BURST_LAT_8 (7 << 4)
-#define MG_BURST_LEN_4 (1 << 1)
-#define MG_BURST_LEN_8 (2 << 1)
-#define MG_BURST_LEN_16 (3 << 1)
-#define MG_BURST_LEN_32 (4 << 1)
-#define MG_BURST_LEN_CONT (0 << 1)
-
-/* timeout value (unit: ms) */
-#define MG_TMAX_CONF_TO_CMD     1
-#define MG_TMAX_WAIT_RD_DRQ     10
-#define MG_TMAX_WAIT_WR_DRQ     500
-#define MG_TMAX_RST_TO_BUSY     10
-#define MG_TMAX_HDRST_TO_RDY    500
-#define MG_TMAX_SWRST_TO_RDY    500
-#define MG_TMAX_RSTOUT          3000
-
-/* device attribution */
-/* use mflash as boot device */
-#define MG_BOOT_DEV             (1 << 0)
-/* use mflash as storage device */
-#define MG_STORAGE_DEV          (1 << 1)
-/* same as MG_STORAGE_DEV, but bootloader already done reset sequence */
-#define MG_STORAGE_DEV_SKIP_RST (1 << 2)
-
-#define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST)
-
-/* names of GPIO resource */
-#define MG_RST_PIN      "mg_rst"
-/* except MG_BOOT_DEV, reset-out pin should be assigned */
-#define MG_RSTOUT_PIN   "mg_rstout"
-
-/* private driver data */
-struct mg_drv_data {
-        /* disk resource */
-        u32 use_polling;
-
-        /* device attribution */
-        u32 dev_attr;
-
-        /* internally used */
-        struct mg_host *host;
-};
-
-/* main structure for mflash driver */
-struct mg_host {
-        struct device *dev;
-
-        struct request_queue *breq;
-        spinlock_t lock;
-        struct gendisk *gd;
-
-        struct timer_list timer;
-        void (*mg_do_intr) (struct mg_host *);
-
-        u16 id[ATA_ID_WORDS];
-
-        u16 cyls;
-        u16 heads;
-        u16 sectors;
-        u32 n_sectors;
-        u32 nres_sectors;
-
-        void __iomem *dev_base;
-        unsigned int irq;
-        unsigned int rst;
-        unsigned int rstout;
-
-        u32 major;
-        u32 error;
-};
-
-/*
- * Debugging macro and defines
- */
-#undef DO_MG_DEBUG
-#ifdef DO_MG_DEBUG
-#  define MG_DBG(fmt, args...) \
-        printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args)
-#else /* CONFIG_MG_DEBUG */
-#  define MG_DBG(fmt, args...) do { } while (0)
-#endif /* CONFIG_MG_DEBUG */
-
-#endif
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index c8f038554e80..b43a9e039059 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -152,5 +152,6 @@ void generic_pipe_buf_unmap(struct pipe_inode_info *, struct pipe_buffer *, void
 void generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *);
 int generic_pipe_buf_confirm(struct pipe_inode_info *, struct pipe_buffer *);
 int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *);
+void generic_pipe_buf_release(struct pipe_inode_info *, struct pipe_buffer *);
 
 #endif
diff --git a/include/linux/splice.h b/include/linux/splice.h
index 5f3faa9d15ae..18e7c7c0cae6 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
@@ -11,8 +11,7 @@
 #include <linux/pipe_fs_i.h>
 
 /*
- * splice is tied to pipes as a transport (at least for now), so we'll just
- * add the splice flags here.
+ * Flags passed in from splice/tee/vmsplice
  */
 #define SPLICE_F_MOVE   (0x01)  /* move pages instead of copying */
 #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h
index 94c56d29869d..4dbcbc1c3481 100644
--- a/include/linux/virtio_blk.h
+++ b/include/linux/virtio_blk.h
@@ -15,6 +15,7 @@
 #define VIRTIO_BLK_F_GEOMETRY   4       /* Legacy geometry available  */
 #define VIRTIO_BLK_F_RO         5       /* Disk is read-only */
 #define VIRTIO_BLK_F_BLK_SIZE   6       /* Block size of disk is available*/
+#define VIRTIO_BLK_F_SCSI       7       /* Supports scsi command passthru */
 
 struct virtio_blk_config
 {
@@ -55,6 +56,13 @@ struct virtio_blk_outhdr
         __u64 sector;
 };
 
+struct virtio_scsi_inhdr {
+        __u32 errors;
+        __u32 data_len;
+        __u32 sense_len;
+        __u32 residual;
+};
+
 /* And this is the final byte of the write scatter-gather list. */
 #define VIRTIO_BLK_S_OK         0
 #define VIRTIO_BLK_S_IOERR      1