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 5b4c6e649c11..93f3690396a5 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 0c39782b2660..b82654e883a7 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 181ebb85f0be..1f56d2c5b7fc 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 2f1746295d06..71ff78c9e4d6 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 a1d813ab0d6b..cc250577d405 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 7b15a5e9cec0..7f83ad90e76f 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 0c81ca731287..9157d64270cb 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 b73116ef9236..1e1f9153000c 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 e1233aabda77..a3fd87b41444 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 d9c2c586502f..7b750245ae76 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 09c14341e6e3..3d967525e9a9 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 395f8ea7981c..cf64ddf5d839 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 682243bf2e46..482c0c4b964f 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 1778e4a2c672..7b3351260d56 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 29b7a648cc6e..0e077150568b 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 d797e209951d..936466f62afd 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 42251095134f..6ec5fc052786 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 d5e753255153..1a50ae70f716 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);