Merge branch 'linus' into x86/xen

Conflicts:
	arch/x86/kernel/cpu/common.c
	arch/x86/kernel/process_64.c
	arch/x86/xen/enlighten.c

18 files changed, 277 insertions, 196 deletions

diff --git a/drivers/block/aoe/aoe.h b/drivers/block/aoe/aoe.h
index 5b4c6e649c1..93f3690396a 100644
--- a/drivers/block/aoe/aoe.h
+++ b/drivers/block/aoe/aoe.h
@@ -159,11 +159,8 @@ struct aoedev {
 	sector_t ssize;
 	struct timer_list timer;
 	spinlock_t lock;
-	struct sk_buff *sendq_hd; /* packets needing to be sent, list head */
-	struct sk_buff *sendq_tl;
-	struct sk_buff *skbpool_hd;
-	struct sk_buff *skbpool_tl;
-	int nskbpool;
+	struct sk_buff_head sendq;
+	struct sk_buff_head skbpool;
 	mempool_t *bufpool;	/* for deadlock-free Buf allocation */
 	struct list_head bufq;	/* queue of bios to work on */
 	struct buf *inprocess;	/* the one we're currently working on */
@@ -199,7 +196,7 @@ int aoedev_flush(const char __user *str, size_t size);
 
 int aoenet_init(void);
 void aoenet_exit(void);
-void aoenet_xmit(struct sk_buff *);
+void aoenet_xmit(struct sk_buff_head *);
 int is_aoe_netif(struct net_device *ifp);
 int set_aoe_iflist(const char __user *str, size_t size);
 
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 0c39782b266..b82654e883a 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -109,12 +109,12 @@ static const struct attribute_group attr_group = {
 static int
 aoedisk_add_sysfs(struct aoedev *d)
 {
-	return sysfs_create_group(&d->gd->dev.kobj, &attr_group);
+	return sysfs_create_group(&disk_to_dev(d->gd)->kobj, &attr_group);
 }
 void
 aoedisk_rm_sysfs(struct aoedev *d)
 {
-	sysfs_remove_group(&d->gd->dev.kobj, &attr_group);
+	sysfs_remove_group(&disk_to_dev(d->gd)->kobj, &attr_group);
 }
 
 static int
@@ -158,9 +158,9 @@ aoeblk_release(struct inode *inode, struct file *filp)
 static int
 aoeblk_make_request(struct request_queue *q, struct bio *bio)
 {
+	struct sk_buff_head queue;
 	struct aoedev *d;
 	struct buf *buf;
-	struct sk_buff *sl;
 	ulong flags;
 
 	blk_queue_bounce(q, &bio);
@@ -213,11 +213,11 @@ aoeblk_make_request(struct request_queue *q, struct bio *bio)
 	list_add_tail(&buf->bufs, &d->bufq);
 
 	aoecmd_work(d);
-	sl = d->sendq_hd;
-	d->sendq_hd = d->sendq_tl = NULL;
+	__skb_queue_head_init(&queue);
+	skb_queue_splice_init(&d->sendq, &queue);
 
 	spin_unlock_irqrestore(&d->lock, flags);
-	aoenet_xmit(sl);
+	aoenet_xmit(&queue);
 
 	return 0;
 }
@@ -276,7 +276,7 @@ aoeblk_gdalloc(void *vp)
 	gd->first_minor = d->sysminor * AOE_PARTITIONS;
 	gd->fops = &aoe_bdops;
 	gd->private_data = d;
-	gd->capacity = d->ssize;
+	set_capacity(gd, d->ssize);
 	snprintf(gd->disk_name, sizeof gd->disk_name, "etherd/e%ld.%d",
 		d->aoemajor, d->aoeminor);
 
diff --git a/drivers/block/aoe/aoechr.c b/drivers/block/aoe/aoechr.c
index 181ebb85f0b..1f56d2c5b7f 100644
--- a/drivers/block/aoe/aoechr.c
+++ b/drivers/block/aoe/aoechr.c
@@ -9,6 +9,7 @@
 #include <linux/completion.h>
 #include <linux/delay.h>
 #include <linux/smp_lock.h>
+#include <linux/skbuff.h>
 #include "aoe.h"
 
 enum {
@@ -103,7 +104,12 @@ loop:
 		spin_lock_irqsave(&d->lock, flags);
 		goto loop;
 	}
-	aoenet_xmit(skb);
+	if (skb) {
+		struct sk_buff_head queue;
+		__skb_queue_head_init(&queue);
+		__skb_queue_tail(&queue, skb);
+		aoenet_xmit(&queue);
+	}
 	aoecmd_cfg(major, minor);
 	return 0;
 }
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 2f1746295d0..71ff78c9e4d 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -114,29 +114,22 @@ ifrotate(struct aoetgt *t)
 static void
 skb_pool_put(struct aoedev *d, struct sk_buff *skb)
 {
-	if (!d->skbpool_hd)
-		d->skbpool_hd = skb;
-	else
-		d->skbpool_tl->next = skb;
-	d->skbpool_tl = skb;
+	__skb_queue_tail(&d->skbpool, skb);
 }
 
 static struct sk_buff *
 skb_pool_get(struct aoedev *d)
 {
-	struct sk_buff *skb;
+	struct sk_buff *skb = skb_peek(&d->skbpool);
 
-	skb = d->skbpool_hd;
 	if (skb && atomic_read(&skb_shinfo(skb)->dataref) == 1) {
-		d->skbpool_hd = skb->next;
-		skb->next = NULL;
+		__skb_unlink(skb, &d->skbpool);
 		return skb;
 	}
-	if (d->nskbpool < NSKBPOOLMAX
-	&& (skb = new_skb(ETH_ZLEN))) {
-		d->nskbpool++;
+	if (skb_queue_len(&d->skbpool) < NSKBPOOLMAX &&
+	    (skb = new_skb(ETH_ZLEN)))
 		return skb;
-	}
+
 	return NULL;
 }
 
@@ -293,29 +286,22 @@ aoecmd_ata_rw(struct aoedev *d)
 
 	skb->dev = t->ifp->nd;
 	skb = skb_clone(skb, GFP_ATOMIC);
-	if (skb) {
-		if (d->sendq_hd)
-			d->sendq_tl->next = skb;
-		else
-			d->sendq_hd = skb;
-		d->sendq_tl = skb;
-	}
+	if (skb)
+		__skb_queue_tail(&d->sendq, skb);
 	return 1;
 }
 
 /* some callers cannot sleep, and they can call this function,
  * transmitting the packets later, when interrupts are on
  */
-static struct sk_buff *
-aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail)
+static void
+aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff_head *queue)
 {
 	struct aoe_hdr *h;
 	struct aoe_cfghdr *ch;
-	struct sk_buff *skb, *sl, *sl_tail;
+	struct sk_buff *skb;
 	struct net_device *ifp;
 
-	sl = sl_tail = NULL;
-
 	read_lock(&dev_base_lock);
 	for_each_netdev(&init_net, ifp) {
 		dev_hold(ifp);
@@ -329,8 +315,7 @@ aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail)
 		}
 		skb_put(skb, sizeof *h + sizeof *ch);
 		skb->dev = ifp;
-		if (sl_tail == NULL)
-			sl_tail = skb;
+		__skb_queue_tail(queue, skb);
 		h = (struct aoe_hdr *) skb_mac_header(skb);
 		memset(h, 0, sizeof *h + sizeof *ch);
 
@@ -342,16 +327,10 @@ aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail)
 		h->minor = aoeminor;
 		h->cmd = AOECMD_CFG;
 
-		skb->next = sl;
-		sl = skb;
 cont:
 		dev_put(ifp);
 	}
 	read_unlock(&dev_base_lock);
-
-	if (tail != NULL)
-		*tail = sl_tail;
-	return sl;
 }
 
 static void
@@ -406,11 +385,7 @@ resend(struct aoedev *d, struct aoetgt *t, struct frame *f)
 	skb = skb_clone(skb, GFP_ATOMIC);
 	if (skb == NULL)
 		return;
-	if (d->sendq_hd)
-		d->sendq_tl->next = skb;
-	else
-		d->sendq_hd = skb;
-	d->sendq_tl = skb;
+	__skb_queue_tail(&d->sendq, skb);
 }
 
 static int
@@ -508,16 +483,15 @@ ata_scnt(unsigned char *packet) {
 static void
 rexmit_timer(ulong vp)
 {
+	struct sk_buff_head queue;
 	struct aoedev *d;
 	struct aoetgt *t, **tt, **te;
 	struct aoeif *ifp;
 	struct frame *f, *e;
-	struct sk_buff *sl;
 	register long timeout;
 	ulong flags, n;
 
 	d = (struct aoedev *) vp;
-	sl = NULL;
 
 	/* timeout is always ~150% of the moving average */
 	timeout = d->rttavg;
@@ -589,7 +563,7 @@ rexmit_timer(ulong vp)
 		}
 	}
 
-	if (d->sendq_hd) {
+	if (!skb_queue_empty(&d->sendq)) {
 		n = d->rttavg <<= 1;
 		if (n > MAXTIMER)
 			d->rttavg = MAXTIMER;
@@ -600,15 +574,15 @@ rexmit_timer(ulong vp)
 		aoecmd_work(d);
 	}
 
-	sl = d->sendq_hd;
-	d->sendq_hd = d->sendq_tl = NULL;
+	__skb_queue_head_init(&queue);
+	skb_queue_splice_init(&d->sendq, &queue);
 
 	d->timer.expires = jiffies + TIMERTICK;
 	add_timer(&d->timer);
 
 	spin_unlock_irqrestore(&d->lock, flags);
 
-	aoenet_xmit(sl);
+	aoenet_xmit(&queue);
 }
 
 /* enters with d->lock held */
@@ -645,7 +619,7 @@ aoecmd_sleepwork(struct work_struct *work)
 		unsigned long flags;
 		u64 ssize;
 
-		ssize = d->gd->capacity;
+		ssize = get_capacity(d->gd);
 		bd = bdget_disk(d->gd, 0);
 
 		if (bd) {
@@ -707,7 +681,7 @@ ataid_complete(struct aoedev *d, struct aoetgt *t, unsigned char *id)
 	if (d->flags & (DEVFL_GDALLOC|DEVFL_NEWSIZE))
 		return;
 	if (d->gd != NULL) {
-		d->gd->capacity = ssize;
+		set_capacity(d->gd, ssize);
 		d->flags |= DEVFL_NEWSIZE;
 	} else
 		d->flags |= DEVFL_GDALLOC;
@@ -756,23 +730,28 @@ diskstats(struct gendisk *disk, struct bio *bio, ulong duration, sector_t sector
 	unsigned long n_sect = bio->bi_size >> 9;
 	const int rw = bio_data_dir(bio);
 	struct hd_struct *part;
+	int cpu;
+
+	cpu = part_stat_lock();
+	part = disk_map_sector_rcu(disk, sector);
+
+	part_stat_inc(cpu, part, ios[rw]);
+	part_stat_add(cpu, part, ticks[rw], duration);
+	part_stat_add(cpu, part, sectors[rw], n_sect);
+	part_stat_add(cpu, part, io_ticks, duration);
 
-	part = get_part(disk, sector);
-	all_stat_inc(disk, part, ios[rw], sector);
-	all_stat_add(disk, part, ticks[rw], duration, sector);
-	all_stat_add(disk, part, sectors[rw], n_sect, sector);
-	all_stat_add(disk, part, io_ticks, duration, sector);
+	part_stat_unlock();
 }
 
 void
 aoecmd_ata_rsp(struct sk_buff *skb)
 {
+	struct sk_buff_head queue;
 	struct aoedev *d;
 	struct aoe_hdr *hin, *hout;
 	struct aoe_atahdr *ahin, *ahout;
 	struct frame *f;
 	struct buf *buf;
-	struct sk_buff *sl;
 	struct aoetgt *t;
 	struct aoeif *ifp;
 	register long n;
@@ -893,21 +872,21 @@ aoecmd_ata_rsp(struct sk_buff *skb)
 
 	aoecmd_work(d);
 xmit:
-	sl = d->sendq_hd;
-	d->sendq_hd = d->sendq_tl = NULL;
+	__skb_queue_head_init(&queue);
+	skb_queue_splice_init(&d->sendq, &queue);
 
 	spin_unlock_irqrestore(&d->lock, flags);
-	aoenet_xmit(sl);
+	aoenet_xmit(&queue);
 }
 
 void
 aoecmd_cfg(ushort aoemajor, unsigned char aoeminor)
 {
-	struct sk_buff *sl;
+	struct sk_buff_head queue;
 
-	sl = aoecmd_cfg_pkts(aoemajor, aoeminor, NULL);
-
-	aoenet_xmit(sl);
+	__skb_queue_head_init(&queue);
+	aoecmd_cfg_pkts(aoemajor, aoeminor, &queue);
+	aoenet_xmit(&queue);
 }
  
 struct sk_buff *
@@ -1076,7 +1055,12 @@ aoecmd_cfg_rsp(struct sk_buff *skb)
 
 	spin_unlock_irqrestore(&d->lock, flags);
 
-	aoenet_xmit(sl);
+	if (sl) {
+		struct sk_buff_head queue;
+		__skb_queue_head_init(&queue);
+		__skb_queue_tail(&queue, sl);
+		aoenet_xmit(&queue);
+	}
 }
 
 void
diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c
index a1d813ab0d6..cc250577d40 100644
--- a/drivers/block/aoe/aoedev.c
+++ b/drivers/block/aoe/aoedev.c
@@ -91,7 +91,7 @@ aoedev_downdev(struct aoedev *d)
 	}
 
 	if (d->gd)
-		d->gd->capacity = 0;
+		set_capacity(d->gd, 0);
 
 	d->flags &= ~DEVFL_UP;
 }
@@ -188,14 +188,12 @@ skbfree(struct sk_buff *skb)
 static void
 skbpoolfree(struct aoedev *d)
 {
-	struct sk_buff *skb;
+	struct sk_buff *skb, *tmp;
 
-	while ((skb = d->skbpool_hd)) {
-		d->skbpool_hd = skb->next;
-		skb->next = NULL;
+	skb_queue_walk_safe(&d->skbpool, skb, tmp)
 		skbfree(skb);
-	}
-	d->skbpool_tl = NULL;
+
+	__skb_queue_head_init(&d->skbpool);
 }
 
 /* find it or malloc it */
@@ -217,6 +215,8 @@ aoedev_by_sysminor_m(ulong sysminor)
 		goto out;
 	INIT_WORK(&d->work, aoecmd_sleepwork);
 	spin_lock_init(&d->lock);
+	skb_queue_head_init(&d->sendq);
+	skb_queue_head_init(&d->skbpool);
 	init_timer(&d->timer);
 	d->timer.data = (ulong) d;
 	d->timer.function = dummy_timer;
diff --git a/drivers/block/aoe/aoemain.c b/drivers/block/aoe/aoemain.c
index 7b15a5e9cec..7f83ad90e76 100644
--- a/drivers/block/aoe/aoemain.c
+++ b/drivers/block/aoe/aoemain.c
@@ -7,6 +7,7 @@
 #include <linux/hdreg.h>
 #include <linux/blkdev.h>
 #include <linux/module.h>
+#include <linux/skbuff.h>
 #include "aoe.h"
 
 MODULE_LICENSE("GPL");
diff --git a/drivers/block/aoe/aoenet.c b/drivers/block/aoe/aoenet.c
index 0c81ca73128..9157d64270c 100644
--- a/drivers/block/aoe/aoenet.c
+++ b/drivers/block/aoe/aoenet.c
@@ -95,13 +95,12 @@ mac_addr(char addr[6])
 }
 
 void
-aoenet_xmit(struct sk_buff *sl)
+aoenet_xmit(struct sk_buff_head *queue)
 {
-	struct sk_buff *skb;
+	struct sk_buff *skb, *tmp;
 
-	while ((skb = sl)) {
-		sl = sl->next;
-		skb->next = skb->prev = NULL;
+	skb_queue_walk_safe(queue, skb, tmp) {
+		__skb_unlink(skb, queue);
 		dev_queue_xmit(skb);
 	}
 }
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index b73116ef923..1e1f9153000 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3460,8 +3460,8 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	       hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
 
 	hba[i]->cmd_pool_bits =
-	    kmalloc(((hba[i]->nr_cmds + BITS_PER_LONG -
-		      1) / BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL);
+	    kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
+			* sizeof(unsigned long), GFP_KERNEL);
 	hba[i]->cmd_pool = (CommandList_struct *)
 	    pci_alloc_consistent(hba[i]->pdev,
 		    hba[i]->nr_cmds * sizeof(CommandList_struct),
@@ -3493,8 +3493,8 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	/* command and error info recs zeroed out before
 	   they are used */
 	memset(hba[i]->cmd_pool_bits, 0,
-	       ((hba[i]->nr_cmds + BITS_PER_LONG -
-		 1) / BITS_PER_LONG) * sizeof(unsigned long));
+	       DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
+			* sizeof(unsigned long));
 
 	hba[i]->num_luns = 0;
 	hba[i]->highest_lun = -1;
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index e1233aabda7..a3fd87b4144 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -365,7 +365,7 @@ struct scsi2map {
 
 static int 
 cciss_scsi_add_entry(int ctlr, int hostno, 
-		unsigned char *scsi3addr, int devtype,
+		struct cciss_scsi_dev_t *device,
 		struct scsi2map *added, int *nadded)
 {
 	/* assumes hba[ctlr]->scsi_ctlr->lock is held */ 
@@ -384,12 +384,12 @@ cciss_scsi_add_entry(int ctlr, int hostno,
 	lun = 0;
 	/* Is this device a non-zero lun of a multi-lun device */
 	/* byte 4 of the 8-byte LUN addr will contain the logical unit no. */
-	if (scsi3addr[4] != 0) {
+	if (device->scsi3addr[4] != 0) {
 		/* Search through our list and find the device which */
 		/* has the same 8 byte LUN address, excepting byte 4. */
 		/* Assign the same bus and target for this new LUN. */
 		/* Use the logical unit number from the firmware. */
-		memcpy(addr1, scsi3addr, 8);
+		memcpy(addr1, device->scsi3addr, 8);
 		addr1[4] = 0;
 		for (i = 0; i < n; i++) {
 			sd = &ccissscsi[ctlr].dev[i];
@@ -399,7 +399,7 @@ cciss_scsi_add_entry(int ctlr, int hostno,
 			if (memcmp(addr1, addr2, 8) == 0) {
 				bus = sd->bus;
 				target = sd->target;
-				lun = scsi3addr[4];
+				lun = device->scsi3addr[4];
 				break;
 			}
 		}
@@ -420,8 +420,12 @@ cciss_scsi_add_entry(int ctlr, int hostno,
 	added[*nadded].lun = sd->lun;
 	(*nadded)++;
 
-	memcpy(&sd->scsi3addr[0], scsi3addr, 8);
-	sd->devtype = devtype;
+	memcpy(sd->scsi3addr, device->scsi3addr, 8);
+	memcpy(sd->vendor, device->vendor, sizeof(sd->vendor));
+	memcpy(sd->revision, device->revision, sizeof(sd->revision));
+	memcpy(sd->device_id, device->device_id, sizeof(sd->device_id));
+	sd->devtype = device->devtype;
+
 	ccissscsi[ctlr].ndevices++;
 
 	/* initially, (before registering with scsi layer) we don't 
@@ -487,6 +491,22 @@ static void fixup_botched_add(int ctlr, char *scsi3addr)
 	CPQ_TAPE_UNLOCK(ctlr, flags);
 }
 
+static int device_is_the_same(struct cciss_scsi_dev_t *dev1,
+	struct cciss_scsi_dev_t *dev2)
+{
+	return dev1->devtype == dev2->devtype &&
+		memcmp(dev1->scsi3addr, dev2->scsi3addr,
+			sizeof(dev1->scsi3addr)) == 0 &&
+		memcmp(dev1->device_id, dev2->device_id,
+			sizeof(dev1->device_id)) == 0 &&
+		memcmp(dev1->vendor, dev2->vendor,
+			sizeof(dev1->vendor)) == 0 &&
+		memcmp(dev1->model, dev2->model,
+			sizeof(dev1->model)) == 0 &&
+		memcmp(dev1->revision, dev2->revision,
+			sizeof(dev1->revision)) == 0;
+}
+
 static int
 adjust_cciss_scsi_table(int ctlr, int hostno,
 	struct cciss_scsi_dev_t sd[], int nsds)
@@ -532,7 +552,7 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 		for (j=0;j<nsds;j++) {
 			if (SCSI3ADDR_EQ(sd[j].scsi3addr,
 				csd->scsi3addr)) {
-				if (sd[j].devtype == csd->devtype)
+				if (device_is_the_same(&sd[j], csd))
 					found=2;
 				else
 					found=1;
@@ -548,22 +568,26 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 			cciss_scsi_remove_entry(ctlr, hostno, i,
 				removed, &nremoved);
 			/* remove ^^^, hence i not incremented */
-		} 
-		else if (found == 1) { /* device is different kind */
+		} else if (found == 1) { /* device is different in some way */
 			changes++;
-			printk("cciss%d: device c%db%dt%dl%d type changed "
-				"(device type now %s).\n",
-				ctlr, hostno, csd->bus, csd->target, csd->lun,
-					scsi_device_type(csd->devtype));
+			printk("cciss%d: device c%db%dt%dl%d has changed.\n",
+				ctlr, hostno, csd->bus, csd->target, csd->lun);
 			cciss_scsi_remove_entry(ctlr, hostno, i,
 				removed, &nremoved);
 			/* remove ^^^, hence i not incremented */
-			if (cciss_scsi_add_entry(ctlr, hostno,
-				&sd[j].scsi3addr[0], sd[j].devtype,
+			if (cciss_scsi_add_entry(ctlr, hostno, &sd[j],
 				added, &nadded) != 0)
 				/* we just removed one, so add can't fail. */
 					BUG();
 			csd->devtype = sd[j].devtype;
+			memcpy(csd->device_id, sd[j].device_id,
+				sizeof(csd->device_id));
+			memcpy(csd->vendor, sd[j].vendor,
+				sizeof(csd->vendor));
+			memcpy(csd->model, sd[j].model,
+				sizeof(csd->model));
+			memcpy(csd->revision, sd[j].revision,
+				sizeof(csd->revision));
 		} else 		/* device is same as it ever was, */
 			i++;	/* so just move along. */
 	}
@@ -577,7 +601,7 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 			csd = &ccissscsi[ctlr].dev[j];
 			if (SCSI3ADDR_EQ(sd[i].scsi3addr,
 				csd->scsi3addr)) {
-				if (sd[i].devtype == csd->devtype)
+				if (device_is_the_same(&sd[i], csd))
 					found=2;	/* found device */
 				else
 					found=1; 	/* found a bug. */
@@ -586,16 +610,14 @@ adjust_cciss_scsi_table(int ctlr, int hostno,
 		}
 		if (!found) {
 			changes++;
-			if (cciss_scsi_add_entry(ctlr, hostno, 
-
-				&sd[i].scsi3addr[0], sd[i].devtype,
+			if (cciss_scsi_add_entry(ctlr, hostno, &sd[i],
 				added, &nadded) != 0)
 				break;
 		} else if (found == 1) {
 			/* should never happen... */
 			changes++;
-			printk("cciss%d: device unexpectedly changed type\n",
-				ctlr);
+			printk(KERN_WARNING "cciss%d: device "
+				"unexpectedly changed\n", ctlr);
 			/* but if it does happen, we just ignore that device */
 		}
 	}
@@ -1012,7 +1034,8 @@ cciss_scsi_interpret_error(CommandList_struct *cp)
 
 static int
 cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr, 
-		 unsigned char *buf, unsigned char bufsize)
+	unsigned char page, unsigned char *buf,
+	unsigned char bufsize)
 {
 	int rc;
 	CommandList_struct *cp;
@@ -1032,8 +1055,8 @@ cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr,
 	ei = cp->err_info; 
 
 	cdb[0] = CISS_INQUIRY;
-	cdb[1] = 0;
-	cdb[2] = 0;
+	cdb[1] = (page != 0);
+	cdb[2] = page;
 	cdb[3] = 0;
 	cdb[4] = bufsize;
 	cdb[5] = 0;
@@ -1053,6 +1076,25 @@ cciss_scsi_do_inquiry(ctlr_info_t *c, unsigned char *scsi3addr,
 	return rc;	
 }
 
+/* Get the device id from inquiry page 0x83 */
+static int cciss_scsi_get_device_id(ctlr_info_t *c, unsigned char *scsi3addr,
+	unsigned char *device_id, int buflen)
+{
+	int rc;
+	unsigned char *buf;
+
+	if (buflen > 16)
+		buflen = 16;
+	buf = kzalloc(64, GFP_KERNEL);
+	if (!buf)
+		return -1;
+	rc = cciss_scsi_do_inquiry(c, scsi3addr, 0x83, buf, 64);
+	if (rc == 0)
+		memcpy(device_id, &buf[8], buflen);
+	kfree(buf);
+	return rc != 0;
+}
+
 static int
 cciss_scsi_do_report_phys_luns(ctlr_info_t *c, 
 		ReportLunData_struct *buf, int bufsize)
@@ -1142,25 +1184,21 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 	ctlr_info_t *c;
 	__u32 num_luns=0;
 	unsigned char *ch;
-	/* unsigned char found[CCISS_MAX_SCSI_DEVS_PER_HBA]; */
-	struct cciss_scsi_dev_t currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
+	struct cciss_scsi_dev_t *currentsd, *this_device;
 	int ncurrent=0;
 	int reportlunsize = sizeof(*ld_buff) + CISS_MAX_PHYS_LUN * 8;
 	int i;
 
 	c = (ctlr_info_t *) hba[cntl_num];	
 	ld_buff = kzalloc(reportlunsize, GFP_KERNEL);
-	if (ld_buff == NULL) {
-		printk(KERN_ERR "cciss: out of memory\n");
-		return;
-	}
 	inq_buff = kmalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
-        if (inq_buff == NULL) {
-                printk(KERN_ERR "cciss: out of memory\n");
-                kfree(ld_buff);
-                return;
+	currentsd = kzalloc(sizeof(*currentsd) *
+			(CCISS_MAX_SCSI_DEVS_PER_HBA+1), GFP_KERNEL);
+	if (ld_buff == NULL || inq_buff == NULL || currentsd == NULL) {
+		printk(KERN_ERR "cciss: out of memory\n");
+		goto out;
 	}
-
+	this_device = &currentsd[CCISS_MAX_SCSI_DEVS_PER_HBA];
 	if (cciss_scsi_do_report_phys_luns(c, ld_buff, reportlunsize) == 0) {
 		ch = &ld_buff->LUNListLength[0];
 		num_luns = ((ch[0]<<24) | (ch[1]<<16) | (ch[2]<<8) | ch[3]) / 8;
@@ -1179,23 +1217,34 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 
 
 	/* adjust our table of devices */	
-	for(i=0; i<num_luns; i++)
-	{
-		int devtype;
-
+	for (i = 0; i < num_luns; i++) {
 		/* for each physical lun, do an inquiry */
 		if (ld_buff->LUN[i][3] & 0xC0) continue;
 		memset(inq_buff, 0, OBDR_TAPE_INQ_SIZE);
 		memcpy(&scsi3addr[0], &ld_buff->LUN[i][0], 8);
 
-		if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, inq_buff,
-			(unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
+		if (cciss_scsi_do_inquiry(hba[cntl_num], scsi3addr, 0, inq_buff,
+			(unsigned char) OBDR_TAPE_INQ_SIZE) != 0)
 			/* Inquiry failed (msg printed already) */
-			devtype = 0; /* so we will skip this device. */
-		} else /* what kind of device is this? */
-			devtype = (inq_buff[0] & 0x1f);
-
-		switch (devtype)
+			continue; /* so we will skip this device. */
+
+		this_device->devtype = (inq_buff[0] & 0x1f);
+		this_device->bus = -1;
+		this_device->target = -1;
+		this_device->lun = -1;
+		memcpy(this_device->scsi3addr, scsi3addr, 8);
+		memcpy(this_device->vendor, &inq_buff[8],
+			sizeof(this_device->vendor));
+		memcpy(this_device->model, &inq_buff[16],
+			sizeof(this_device->model));
+		memcpy(this_device->revision, &inq_buff[32],
+			sizeof(this_device->revision));
+		memset(this_device->device_id, 0,
+			sizeof(this_device->device_id));
+		cciss_scsi_get_device_id(hba[cntl_num], scsi3addr,
+			this_device->device_id, sizeof(this_device->device_id));
+
+		switch (this_device->devtype)
 		{
 		  case 0x05: /* CD-ROM */ {
 
@@ -1220,15 +1269,10 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 			if (ncurrent >= CCISS_MAX_SCSI_DEVS_PER_HBA) {
 				printk(KERN_INFO "cciss%d: %s ignored, "
 					"too many devices.\n", cntl_num,
-					scsi_device_type(devtype));
+					scsi_device_type(this_device->devtype));
 				break;
 			}
-			memcpy(&currentsd[ncurrent].scsi3addr[0], 
-				&scsi3addr[0], 8);
-			currentsd[ncurrent].devtype = devtype;
-			currentsd[ncurrent].bus = -1;
-			currentsd[ncurrent].target = -1;
-			currentsd[ncurrent].lun = -1;
+			currentsd[ncurrent] = *this_device;
 			ncurrent++;
 			break;
 		  default: 
@@ -1240,6 +1284,7 @@ cciss_update_non_disk_devices(int cntl_num, int hostno)
 out:
 	kfree(inq_buff);
 	kfree(ld_buff);
+	kfree(currentsd);
 	return;
 }
 
diff --git a/drivers/block/cciss_scsi.h b/drivers/block/cciss_scsi.h
index d9c2c586502..7b750245ae7 100644
--- a/drivers/block/cciss_scsi.h
+++ b/drivers/block/cciss_scsi.h
@@ -66,6 +66,10 @@ struct cciss_scsi_dev_t {
 	int devtype;
 	int bus, target, lun;		/* as presented to the OS */
 	unsigned char scsi3addr[8];	/* as presented to the HW */
+	unsigned char device_id[16];	/* from inquiry pg. 0x83 */
+	unsigned char vendor[8];	/* bytes 8-15 of inquiry data */
+	unsigned char model[16];	/* bytes 16-31 of inquiry data */
+	unsigned char revision[4];	/* bytes 32-35 of inquiry data */
 };
 
 struct cciss_scsi_hba_t {
diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index 09c14341e6e..3d967525e9a 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -424,7 +424,7 @@ static int __init cpqarray_register_ctlr( int i, struct pci_dev *pdev)
 		hba[i]->pci_dev, NR_CMDS * sizeof(cmdlist_t),
 		&(hba[i]->cmd_pool_dhandle));
 	hba[i]->cmd_pool_bits = kcalloc(
-		(NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG, sizeof(unsigned long),
+		DIV_ROUND_UP(NR_CMDS, BITS_PER_LONG), sizeof(unsigned long),
 		GFP_KERNEL);
 
 	if (!hba[i]->cmd_pool_bits || !hba[i]->cmd_pool)
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 395f8ea7981..cf64ddf5d83 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -423,8 +423,15 @@ static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
  * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
  * side 0 is on physical side 0 (but with the misnamed sector IDs).
  * 'stretch' should probably be renamed to something more general, like
- * 'options'.  Other parameters should be self-explanatory (see also
- * setfdprm(8)).
+ * 'options'.
+ *
+ * Bits 2 through 9 of 'stretch' tell the number of the first sector.
+ * The LSB (bit 2) is flipped. For most disks, the first sector
+ * is 1 (represented by 0x00<<2).  For some CP/M and music sampler
+ * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
+ * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
+ *
+ * Other parameters should be self-explanatory (see also setfdprm(8)).
  */
 /*
 	    Size
@@ -1355,20 +1362,20 @@ static void fdc_specify(void)
 	}
 
 	/* Convert step rate from microseconds to milliseconds and 4 bits */
-	srt = 16 - (DP->srt * scale_dtr / 1000 + NOMINAL_DTR - 1) / NOMINAL_DTR;
+	srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
 	if (slow_floppy) {
 		srt = srt / 4;
 	}
 	SUPBOUND(srt, 0xf);
 	INFBOUND(srt, 0);
 
-	hlt = (DP->hlt * scale_dtr / 2 + NOMINAL_DTR - 1) / NOMINAL_DTR;
+	hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
 	if (hlt < 0x01)
 		hlt = 0x01;
 	else if (hlt > 0x7f)
 		hlt = hlt_max_code;
 
-	hut = (DP->hut * scale_dtr / 16 + NOMINAL_DTR - 1) / NOMINAL_DTR;
+	hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
 	if (hut < 0x1)
 		hut = 0x1;
 	else if (hut > 0xf)
@@ -2236,9 +2243,9 @@ static void setup_format_params(int track)
 			}
 		}
 	}
-	if (_floppy->stretch & FD_ZEROBASED) {
+	if (_floppy->stretch & FD_SECTBASEMASK) {
 		for (count = 0; count < F_SECT_PER_TRACK; count++)
-			here[count].sect--;
+			here[count].sect += FD_SECTBASE(_floppy) - 1;
 	}
 }
 
@@ -2385,7 +2392,7 @@ static void rw_interrupt(void)
 
 #ifdef FLOPPY_SANITY_CHECK
 	if (nr_sectors / ssize >
-	    (in_sector_offset + current_count_sectors + ssize - 1) / ssize) {
+	    DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
 		DPRINT("long rw: %x instead of %lx\n",
 		       nr_sectors, current_count_sectors);
 		printk("rs=%d s=%d\n", R_SECTOR, SECTOR);
@@ -2649,7 +2656,7 @@ static int make_raw_rw_request(void)
 	}
 	HEAD = fsector_t / _floppy->sect;
 
-	if (((_floppy->stretch & (FD_SWAPSIDES | FD_ZEROBASED)) ||
+	if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
 	     TESTF(FD_NEED_TWADDLE)) && fsector_t < _floppy->sect)
 		max_sector = _floppy->sect;
 
@@ -2679,7 +2686,7 @@ static int make_raw_rw_request(void)
 	CODE2SIZE;
 	SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
 	SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
-	    ((_floppy->stretch & FD_ZEROBASED) ? 0 : 1);
+	    FD_SECTBASE(_floppy);
 
 	/* tracksize describes the size which can be filled up with sectors
 	 * of size ssize.
@@ -3311,7 +3318,7 @@ static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
 	    g->head <= 0 ||
 	    g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
 	    /* check if reserved bits are set */
-	    (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_ZEROBASED)) != 0)
+	    (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
 		return -EINVAL;
 	if (type) {
 		if (!capable(CAP_SYS_ADMIN))
@@ -3356,7 +3363,7 @@ static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
 		if (DRS->maxblock > user_params[drive].sect ||
 		    DRS->maxtrack ||
 		    ((user_params[drive].sect ^ oldStretch) &
-		     (FD_SWAPSIDES | FD_ZEROBASED)))
+		     (FD_SWAPSIDES | FD_SECTBASEMASK)))
 			invalidate_drive(bdev);
 		else
 			process_fd_request();
diff --git a/drivers/block/hd.c b/drivers/block/hd.c
index 682243bf2e4..482c0c4b964 100644
--- a/drivers/block/hd.c
+++ b/drivers/block/hd.c
@@ -39,6 +39,7 @@
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <linux/blkpg.h>
+#include <linux/ata.h>
 #include <linux/hdreg.h>
 
 #define REALLY_SLOW_IO
@@ -370,7 +371,7 @@ repeat:
 		struct hd_i_struct *disk = &hd_info[i];
 		disk->special_op = disk->recalibrate = 1;
 		hd_out(disk, disk->sect, disk->sect, disk->head-1,
-			disk->cyl, WIN_SPECIFY, &reset_hd);
+			disk->cyl, ATA_CMD_INIT_DEV_PARAMS, &reset_hd);
 		if (reset)
 			goto repeat;
 	} else
@@ -558,7 +559,7 @@ static int do_special_op(struct hd_i_struct *disk, struct request *req)
 {
 	if (disk->recalibrate) {
 		disk->recalibrate = 0;
-		hd_out(disk, disk->sect, 0, 0, 0, WIN_RESTORE, &recal_intr);
+		hd_out(disk, disk->sect, 0, 0, 0, ATA_CMD_RESTORE, &recal_intr);
 		return reset;
 	}
 	if (disk->head > 16) {
@@ -631,13 +632,13 @@ repeat:
 	if (blk_fs_request(req)) {
 		switch (rq_data_dir(req)) {
 		case READ:
-			hd_out(disk, nsect, sec, head, cyl, WIN_READ,
+			hd_out(disk, nsect, sec, head, cyl, ATA_CMD_PIO_READ,
 				&read_intr);
 			if (reset)
 				goto repeat;
 			break;
 		case WRITE:
-			hd_out(disk, nsect, sec, head, cyl, WIN_WRITE,
+			hd_out(disk, nsect, sec, head, cyl, ATA_CMD_PIO_WRITE,
 				&write_intr);
 			if (reset)
 				goto repeat;
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 1778e4a2c67..7b3351260d5 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -403,7 +403,7 @@ static int nbd_do_it(struct nbd_device *lo)
 	BUG_ON(lo->magic != LO_MAGIC);
 
 	lo->pid = current->pid;
-	ret = sysfs_create_file(&lo->disk->dev.kobj, &pid_attr.attr);
+	ret = sysfs_create_file(&disk_to_dev(lo->disk)->kobj, &pid_attr.attr);
 	if (ret) {
 		printk(KERN_ERR "nbd: sysfs_create_file failed!");
 		return ret;
@@ -412,7 +412,7 @@ static int nbd_do_it(struct nbd_device *lo)
 	while ((req = nbd_read_stat(lo)) != NULL)
 		nbd_end_request(req);
 
-	sysfs_remove_file(&lo->disk->dev.kobj, &pid_attr.attr);
+	sysfs_remove_file(&disk_to_dev(lo->disk)->kobj, &pid_attr.attr);
 	return 0;
 }
 
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 29b7a648cc6..0e077150568 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2544,7 +2544,7 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
 		if (last_zone != zone) {
 			BUG_ON(last_zone != zone + pd->settings.size);
 			first_sectors = last_zone - bio->bi_sector;
-			bp = bio_split(bio, bio_split_pool, first_sectors);
+			bp = bio_split(bio, first_sectors);
 			BUG_ON(!bp);
 			pkt_make_request(q, &bp->bio1);
 			pkt_make_request(q, &bp->bio2);
@@ -2911,7 +2911,7 @@ static int pkt_setup_dev(dev_t dev, dev_t* pkt_dev)
 	if (!disk->queue)
 		goto out_mem2;
 
-	pd->pkt_dev = MKDEV(disk->major, disk->first_minor);
+	pd->pkt_dev = MKDEV(pktdev_major, idx);
 	ret = pkt_new_dev(pd, dev);
 	if (ret)
 		goto out_new_dev;
diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
index d797e209951..936466f62af 100644
--- a/drivers/block/ps3disk.c
+++ b/drivers/block/ps3disk.c
@@ -199,7 +199,8 @@ static void ps3disk_do_request(struct ps3_storage_device *dev,
 		if (blk_fs_request(req)) {
 			if (ps3disk_submit_request_sg(dev, req))
 				break;
-		} else if (req->cmd_type == REQ_TYPE_FLUSH) {
+		} else if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
+			   req->cmd[0] == REQ_LB_OP_FLUSH) {
 			if (ps3disk_submit_flush_request(dev, req))
 				break;
 		} else {
@@ -257,7 +258,8 @@ static irqreturn_t ps3disk_interrupt(int irq, void *data)
 		return IRQ_HANDLED;
 	}
 
-	if (req->cmd_type == REQ_TYPE_FLUSH) {
+	if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
+	    req->cmd[0] == REQ_LB_OP_FLUSH) {
 		read = 0;
 		num_sectors = req->hard_cur_sectors;
 		op = "flush";
@@ -405,7 +407,8 @@ static void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
 
 	dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
 
-	req->cmd_type = REQ_TYPE_FLUSH;
+	req->cmd_type = REQ_TYPE_LINUX_BLOCK;
+	req->cmd[0] = REQ_LB_OP_FLUSH;
 }
 
 static unsigned long ps3disk_mask;
@@ -538,7 +541,7 @@ static int ps3disk_remove(struct ps3_system_bus_device *_dev)
 	struct ps3disk_private *priv = dev->sbd.core.driver_data;
 
 	mutex_lock(&ps3disk_mask_mutex);
-	__clear_bit(priv->gendisk->first_minor / PS3DISK_MINORS,
+	__clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS,
 		    &ps3disk_mask);
 	mutex_unlock(&ps3disk_mask_mutex);
 	del_gendisk(priv->gendisk);
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 42251095134..6ec5fc05278 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -47,20 +47,20 @@ static void blk_done(struct virtqueue *vq)
 
 	spin_lock_irqsave(&vblk->lock, flags);
 	while ((vbr = vblk->vq->vq_ops->get_buf(vblk->vq, &len)) != NULL) {
-		int uptodate;
+		int error;
 		switch (vbr->status) {
 		case VIRTIO_BLK_S_OK:
-			uptodate = 1;
+			error = 0;
 			break;
 		case VIRTIO_BLK_S_UNSUPP:
-			uptodate = -ENOTTY;
+			error = -ENOTTY;
 			break;
 		default:
-			uptodate = 0;
+			error = -EIO;
 			break;
 		}
 
-		end_dequeued_request(vbr->req, uptodate);
+		__blk_end_request(vbr->req, error, blk_rq_bytes(vbr->req));
 		list_del(&vbr->list);
 		mempool_free(vbr, vblk->pool);
 	}
@@ -84,11 +84,11 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
 	if (blk_fs_request(vbr->req)) {
 		vbr->out_hdr.type = 0;
 		vbr->out_hdr.sector = vbr->req->sector;
-		vbr->out_hdr.ioprio = vbr->req->ioprio;
+		vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
 	} else if (blk_pc_request(vbr->req)) {
 		vbr->out_hdr.type = VIRTIO_BLK_T_SCSI_CMD;
 		vbr->out_hdr.sector = 0;
-		vbr->out_hdr.ioprio = vbr->req->ioprio;
+		vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
 	} else {
 		/* We don't put anything else in the queue. */
 		BUG();
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index d5e75325515..1a50ae70f71 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -105,15 +105,17 @@ static DEFINE_SPINLOCK(blkif_io_lock);
 #define GRANT_INVALID_REF	0
 
 #define PARTS_PER_DISK		16
+#define PARTS_PER_EXT_DISK      256
 
 #define BLKIF_MAJOR(dev) ((dev)>>8)
 #define BLKIF_MINOR(dev) ((dev) & 0xff)
 
-#define DEV_NAME	"xvd"	/* name in /dev */
+#define EXT_SHIFT 28
+#define EXTENDED (1<<EXT_SHIFT)
+#define VDEV_IS_EXTENDED(dev) ((dev)&(EXTENDED))
+#define BLKIF_MINOR_EXT(dev) ((dev)&(~EXTENDED))
 
-/* Information about our VBDs. */
-#define MAX_VBDS 64
-static LIST_HEAD(vbds_list);
+#define DEV_NAME	"xvd"	/* name in /dev */
 
 static int get_id_from_freelist(struct blkfront_info *info)
 {
@@ -386,31 +388,60 @@ static int xlvbd_barrier(struct blkfront_info *info)
 }
 
 
-static int xlvbd_alloc_gendisk(int minor, blkif_sector_t capacity,
-			       int vdevice, u16 vdisk_info, u16 sector_size,
-			       struct blkfront_info *info)
+static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
+			       struct blkfront_info *info,
+			       u16 vdisk_info, u16 sector_size)
 {
 	struct gendisk *gd;
 	int nr_minors = 1;
 	int err = -ENODEV;
+	unsigned int offset;
+	int minor;
+	int nr_parts;
 
 	BUG_ON(info->gd != NULL);
 	BUG_ON(info->rq != NULL);
 
-	if ((minor % PARTS_PER_DISK) == 0)
-		nr_minors = PARTS_PER_DISK;
+	if ((info->vdevice>>EXT_SHIFT) > 1) {
+		/* this is above the extended range; something is wrong */
+		printk(KERN_WARNING "blkfront: vdevice 0x%x is above the extended range; ignoring\n", info->vdevice);
+		return -ENODEV;
+	}
+
+	if (!VDEV_IS_EXTENDED(info->vdevice)) {
+		minor = BLKIF_MINOR(info->vdevice);
+		nr_parts = PARTS_PER_DISK;
+	} else {
+		minor = BLKIF_MINOR_EXT(info->vdevice);
+		nr_parts = PARTS_PER_EXT_DISK;
+	}
+
+	if ((minor % nr_parts) == 0)
+		nr_minors = nr_parts;
 
 	gd = alloc_disk(nr_minors);
 	if (gd == NULL)
 		goto out;
 
-	if (nr_minors > 1)
-		sprintf(gd->disk_name, "%s%c", DEV_NAME,
-			'a' + minor / PARTS_PER_DISK);
-	else
-		sprintf(gd->disk_name, "%s%c%d", DEV_NAME,
-			'a' + minor / PARTS_PER_DISK,
-			minor % PARTS_PER_DISK);
+	offset = minor / nr_parts;
+
+	if (nr_minors > 1) {
+		if (offset < 26)
+			sprintf(gd->disk_name, "%s%c", DEV_NAME, 'a' + offset);
+		else
+			sprintf(gd->disk_name, "%s%c%c", DEV_NAME,
+				'a' + ((offset / 26)-1), 'a' + (offset % 26));
+	} else {
+		if (offset < 26)
+			sprintf(gd->disk_name, "%s%c%d", DEV_NAME,
+				'a' + offset,
+				minor & (nr_parts - 1));
+		else
+			sprintf(gd->disk_name, "%s%c%c%d", DEV_NAME,
+				'a' + ((offset / 26) - 1),
+				'a' + (offset % 26),
+				minor & (nr_parts - 1));
+	}
 
 	gd->major = XENVBD_MAJOR;
 	gd->first_minor = minor;
@@ -699,8 +730,13 @@ static int blkfront_probe(struct xenbus_device *dev,
 	err = xenbus_scanf(XBT_NIL, dev->nodename,
 			   "virtual-device", "%i", &vdevice);
 	if (err != 1) {
-		xenbus_dev_fatal(dev, err, "reading virtual-device");
-		return err;
+		/* go looking in the extended area instead */
+		err = xenbus_scanf(XBT_NIL, dev->nodename, "virtual-device-ext",
+				   "%i", &vdevice);
+		if (err != 1) {
+			xenbus_dev_fatal(dev, err, "reading virtual-device");
+			return err;
+		}
 	}
 
 	info = kzalloc(sizeof(*info), GFP_KERNEL);
@@ -861,9 +897,7 @@ static void blkfront_connect(struct blkfront_info *info)
 	if (err)
 		info->feature_barrier = 0;
 
-	err = xlvbd_alloc_gendisk(BLKIF_MINOR(info->vdevice),
-				  sectors, info->vdevice,
-				  binfo, sector_size, info);
+	err = xlvbd_alloc_gendisk(sectors, info, binfo, sector_size);
 	if (err) {
 		xenbus_dev_fatal(info->xbdev, err, "xlvbd_add at %s",
 				 info->xbdev->otherend);