[PATCH] (23/25) move pointer to gendisk from hwif to drive

	 ide switched from hwif->gd[i] to hwif->drive[i]->disk - IOW, instead
of array of two pointers to gendisks refered from hwif, we keep these pointers
in relevant drives.  Cleaned up.

drivers/ide/ide-cd.c

@@ -2593,9 +2593,8 @@ static int ide_cdrom_register (ide_drive_t *drive, int nslots)
 {
 	struct cdrom_info *info = drive->driver_data;
 	struct cdrom_device_info *devinfo = &info->devinfo;
-	int minor = (drive->select.b.unit) << PARTN_BITS;
 
-	devinfo->dev = mk_kdev(HWIF(drive)->major, minor);
+	devinfo->dev = mk_kdev(drive->disk->major, drive->disk->first_minor);
 	devinfo->ops = &ide_cdrom_dops;
 	devinfo->mask = 0;
 	*(int *)&devinfo->speed = CDROM_STATE_FLAGS (drive)->current_speed;
@@ -2622,7 +2621,8 @@ static int ide_cdrom_register (ide_drive_t *drive, int nslots)
 		devinfo->mask |= CDC_CLOSE_TRAY;
 
 	devinfo->de = devfs_register(drive->de, "cd", DEVFS_FL_DEFAULT,
-				     HWIF(drive)->major, minor,
+				     drive->disk->major,
+				     drive->disk->first_minor,
 				     S_IFBLK | S_IRUGO | S_IWUGO,
 				     ide_fops, NULL);
 
@@ -2823,13 +2823,12 @@ int ide_cdrom_setup (ide_drive_t *drive)
 {
 	struct cdrom_info *info = drive->driver_data;
 	struct cdrom_device_info *cdi = &info->devinfo;
-	int minor = drive->select.b.unit << PARTN_BITS;
 	int nslots;
 
 	/*
 	 * default to read-only always and fix latter at the bottom
 	 */
-	set_device_ro(mk_kdev(HWIF(drive)->major, minor), 1);
+	set_device_ro(mk_kdev(drive->disk->major, drive->disk->first_minor), 1);
 	blk_queue_hardsect_size(&drive->queue, CD_FRAMESIZE);
 
 	blk_queue_prep_rq(&drive->queue, ll_10byte_cmd_build);
@@ -2951,7 +2950,7 @@ int ide_cdrom_setup (ide_drive_t *drive)
 	nslots = ide_cdrom_probe_capabilities (drive);
 
 	if (CDROM_CONFIG_FLAGS(drive)->dvd_ram)
-		set_device_ro(mk_kdev(HWIF(drive)->major, minor), 0);
+		set_device_ro(mk_kdev(drive->disk->major, drive->disk->first_minor), 0);
 
 	if (ide_cdrom_register (drive, nslots)) {
 		printk ("%s: ide_cdrom_setup failed to register device with the cdrom driver.\n", drive->name);
@@ -2998,8 +2997,8 @@ void ide_cdrom_release (struct inode *inode, struct file *file,
 static
 int ide_cdrom_check_media_change (ide_drive_t *drive)
 {
-	return cdrom_media_changed(mk_kdev(HWIF (drive)->major,
-			(drive->select.b.unit) << PARTN_BITS));
+	return cdrom_media_changed(mk_kdev(drive->disk->major,
+			drive->disk->first_minor));
 }
 
 static
@@ -3025,9 +3024,7 @@ int ide_cdrom_cleanup(ide_drive_t *drive)
 {
 	struct cdrom_info *info = drive->driver_data;
 	struct cdrom_device_info *devinfo = &info->devinfo;
-	ide_hwif_t *hwif = HWIF(drive);
-	int unit = drive - hwif->drives;
-	struct gendisk *g = hwif->gd[unit];
+	struct gendisk *g = drive->disk;
 
 	if (ide_unregister_subdriver (drive))
 		return 1;
@@ -3092,9 +3089,7 @@ MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
 static int ide_cdrom_reinit (ide_drive_t *drive)
 {
 	struct cdrom_info *info;
-	ide_hwif_t *hwif = HWIF(drive);
-	int unit = drive - hwif->drives;
-	struct gendisk *g = hwif->gd[unit];
+	struct gendisk *g = drive->disk;
 	struct request_sense sense;
 
 	if (!strstr("ide-cdrom", drive->driver_req))

drivers/ide/ide-disk.c

@@ -1618,9 +1618,7 @@ static void idedisk_setup (ide_drive_t *drive)
 
 static int idedisk_cleanup (ide_drive_t *drive)
 {
-	ide_hwif_t *hwif = HWIF(drive);
-	int unit = drive - hwif->drives;
-	struct gendisk *g = hwif->gd[unit];
+	struct gendisk *g = drive->disk;
 	if ((drive->id->cfs_enable_2 & 0x3000) && drive->wcache)
 		if (do_idedisk_flushcache(drive))
 			printk (KERN_INFO "%s: Write Cache FAILED Flushing!\n",
@@ -1672,9 +1670,7 @@ MODULE_DESCRIPTION("ATA DISK Driver");
 
 static int idedisk_reinit(ide_drive_t *drive)
 {
-	ide_hwif_t *hwif = HWIF(drive);
-	int unit = drive - hwif->drives;
-	struct gendisk *g = hwif->gd[unit];
+	struct gendisk *g = drive->disk;
 
 	/* strstr("foo", "") is non-NULL */
 	if (!strstr("ide-disk", drive->driver_req))

drivers/ide/ide-floppy.c

@@ -2112,9 +2112,7 @@ static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
 static int idefloppy_cleanup (ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
-	ide_hwif_t *hwif = HWIF(drive);
-	int unit = drive - hwif->drives;
-	struct gendisk *g = hwif->gd[unit];
+	struct gendisk *g = drive->disk;
 
 	if (ide_unregister_subdriver (drive))
 		return 1;
@@ -2181,9 +2179,7 @@ static ide_driver_t idefloppy_driver = {
 static int idefloppy_reinit (ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy;
-	ide_hwif_t *hwif = HWIF(drive);
-	int unit = drive - hwif->drives;
-	struct gendisk *g = hwif->gd[unit];
+	struct gendisk *g = drive->disk;
 	if (!strstr("ide-floppy", drive->driver_req))
 		goto failed;
 	if (!drive->present)

drivers/ide/ide-probe.c

@@ -848,7 +848,7 @@ static void init_gendisk (ide_hwif_t *hwif)
 		gd[unit].major_name = names + 4*unit;
 		gd[unit].minor_shift = PARTN_BITS; 
 		gd[unit].fops = ide_fops;
-		hwif->gd[unit] = gd + unit;
+		hwif->drives[unit].disk = gd + unit;
 	}
 
 	for (unit = 0; unit < units; ++unit) {

drivers/ide/ide.c

@@ -1748,10 +1748,7 @@ int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t actio
 
 void ide_revalidate_drive (ide_drive_t *drive)
 {
-	ide_hwif_t *hwif = HWIF(drive);
-	int unit = drive - hwif->drives;
-	struct gendisk *g = hwif->gd[unit];
-	g->part[0].nr_sects = current_capacity(drive);
+	drive->disk->part[0].nr_sects = current_capacity(drive);
 }
 
 /*
@@ -2058,13 +2055,13 @@ void ide_unregister (unsigned int index)
 	blk_dev[hwif->major].data = NULL;
 	blk_dev[hwif->major].queue = NULL;
 	blk_clear(hwif->major);
-	gd = hwif->gd[0];
+	gd = hwif->drives[0].disk;
 	if (gd) {
 		int i;
 		kfree(gd->part);
 		kfree(gd);
 		for (i = 0; i < MAX_DRIVES; i++)
-			hwif->gd[i] = NULL;
+			hwif->drives[i].disk = NULL;
 	}
 	old_hwif		= *hwif;
 	init_hwif_data (index);	/* restore hwif data to pristine status */

include/linux/ide.h

@@ -530,6 +530,7 @@ typedef struct ide_drive_s {
 	unsigned int	failures;	/* current failure count */
 	unsigned int	max_failures;	/* maximum allowed failure count */
 	struct list_head list;
+	struct gendisk *disk;
 } ide_drive_t;
 
 /*
@@ -716,7 +717,6 @@ typedef struct hwif_s {
  */
 	hw_regs_t	hw;		/* Hardware info */
 	ide_drive_t	drives[MAX_DRIVES];	/* drive info */
-	struct gendisk	*gd[MAX_DRIVES];/* gendisk structure */
 	int		addressing;	/* hosts addressing */
 	void		(*tuneproc)(ide_drive_t *, byte);	/* routine to tune PIO mode for drives */
 	int		(*speedproc)(ide_drive_t *, byte);	/* routine to retune DMA modes for drives */