Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (27 commits)
  [S390] Fix checkstack for s390
  [S390] fix initialization of stp
  [S390] 3215: Remove tasklet.
  [S390] console flush on panic / reboot
  [S390] introduce dirty bit for kvm live migration
  [S390] Add ioctl support for EMC Symmetrix Subsystem Control I/O
  [S390] xpram: per device block request queues.
  [S390] dasd: fix message flood for unsolicited interrupts
  [S390] Move private simple udelay function to arch/s390/lib/delay.c.
  [S390] dcssblk: add >2G DCSSs support and stacked contiguous DCSSs support.
  [S390] ptrace changes
  [S390] s390: use sys_pause for 31bit pause entry point
  [S390] qdio enhanced SIGA (iqdio) support.
  [S390] cio: fix cio_tpi.
  [S390] cio: Correct use of ! and &
  [S390] cio: inline assembly cleanup
  [S390] bus_id -> dev_set_name() for css and ccw busses
  [S390] bus_id ->dev_name() conversions in qdio
  [S390] Use s390_root_dev_* in kvm_virtio.
  [S390] more bus_id -> dev_name conversions
  ...

53 files changed, 1045 insertions, 513 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index acb78017e7d..0a225ccda02 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -215,7 +215,7 @@ static int dasd_state_known_to_basic(struct dasd_device *device)
 			return rc;
 	}
 	/* register 'device' debug area, used for all DBF_DEV_XXX calls */
-	device->debug_area = debug_register(device->cdev->dev.bus_id, 1, 1,
+	device->debug_area = debug_register(dev_name(&device->cdev->dev), 1, 1,
 					    8 * sizeof(long));
 	debug_register_view(device->debug_area, &debug_sprintf_view);
 	debug_set_level(device->debug_area, DBF_WARNING);
@@ -933,7 +933,7 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
 		MESSAGE(KERN_DEBUG,
 			"invalid status in handle_killed_request: "
 			"bus_id %s, status %02x",
-			cdev->dev.bus_id, cqr->status);
+			dev_name(&cdev->dev), cqr->status);
 		return;
 	}
 
@@ -942,7 +942,7 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
 	    device != dasd_device_from_cdev_locked(cdev) ||
 	    strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
 		MESSAGE(KERN_DEBUG, "invalid device in request: bus_id %s",
-			cdev->dev.bus_id);
+			dev_name(&cdev->dev));
 		return;
 	}
 
@@ -982,11 +982,11 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 			break;
 		case -ETIMEDOUT:
 			printk(KERN_WARNING"%s(%s): request timed out\n",
-			       __func__, cdev->dev.bus_id);
+			       __func__, dev_name(&cdev->dev));
 			break;
 		default:
 			printk(KERN_WARNING"%s(%s): unknown error %ld\n",
-			       __func__, cdev->dev.bus_id, PTR_ERR(irb));
+			       __func__, dev_name(&cdev->dev), PTR_ERR(irb));
 		}
 		dasd_handle_killed_request(cdev, intparm);
 		return;
@@ -995,7 +995,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 	now = get_clock();
 
 	DBF_EVENT(DBF_ERR, "Interrupt: bus_id %s CS/DS %04x ip %08x",
-		  cdev->dev.bus_id, ((irb->scsw.cmd.cstat << 8) |
+		  dev_name(&cdev->dev), ((irb->scsw.cmd.cstat << 8) |
 		  irb->scsw.cmd.dstat), (unsigned int) intparm);
 
 	/* check for unsolicited interrupts */
@@ -1019,7 +1019,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 	if (!device ||
 	    strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
 		MESSAGE(KERN_DEBUG, "invalid device in request: bus_id %s",
-			cdev->dev.bus_id);
+			dev_name(&cdev->dev));
 		return;
 	}
 
@@ -1037,7 +1037,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 	if (cqr->status != DASD_CQR_IN_IO) {
 		MESSAGE(KERN_DEBUG,
 			"invalid status: bus_id %s, status %02x",
-			cdev->dev.bus_id, cqr->status);
+			dev_name(&cdev->dev), cqr->status);
 		return;
 	}
 	DBF_DEV_EVENT(DBF_DEBUG, device, "Int: CS/DS 0x%04x for cqr %p",
@@ -2134,14 +2134,14 @@ int dasd_generic_probe(struct ccw_device *cdev,
 	if (ret) {
 		printk(KERN_WARNING
 		       "dasd_generic_probe: could not set ccw-device options "
-		       "for %s\n", cdev->dev.bus_id);
+		       "for %s\n", dev_name(&cdev->dev));
 		return ret;
 	}
 	ret = dasd_add_sysfs_files(cdev);
 	if (ret) {
 		printk(KERN_WARNING
 		       "dasd_generic_probe: could not add sysfs entries "
-		       "for %s\n", cdev->dev.bus_id);
+		       "for %s\n", dev_name(&cdev->dev));
 		return ret;
 	}
 	cdev->handler = &dasd_int_handler;
@@ -2152,13 +2152,13 @@ int dasd_generic_probe(struct ccw_device *cdev,
 	 * initial probe.
 	 */
 	if ((dasd_get_feature(cdev, DASD_FEATURE_INITIAL_ONLINE) > 0 ) ||
-	    (dasd_autodetect && dasd_busid_known(cdev->dev.bus_id) != 0))
+	    (dasd_autodetect && dasd_busid_known(dev_name(&cdev->dev)) != 0))
 		ret = ccw_device_set_online(cdev);
 	if (ret)
 		printk(KERN_WARNING
 		       "dasd_generic_probe: could not initially "
 		       "online ccw-device %s; return code: %d\n",
-		       cdev->dev.bus_id, ret);
+		       dev_name(&cdev->dev), ret);
 	return 0;
 }
 
@@ -2224,7 +2224,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
 		        printk (KERN_WARNING
 				"dasd_generic couldn't online device %s "
 				"- discipline DIAG not available\n",
-				cdev->dev.bus_id);
+				dev_name(&cdev->dev));
 			dasd_delete_device(device);
 			return -ENODEV;
 		}
@@ -2248,7 +2248,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
 		printk (KERN_WARNING
 			"dasd_generic couldn't online device %s "
 			"with discipline %s rc=%i\n",
-			cdev->dev.bus_id, discipline->name, rc);
+			dev_name(&cdev->dev), discipline->name, rc);
 		module_put(discipline->owner);
 		module_put(base_discipline->owner);
 		dasd_delete_device(device);
@@ -2259,7 +2259,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
 	if (device->state <= DASD_STATE_KNOWN) {
 		printk (KERN_WARNING
 			"dasd_generic discipline not found for %s\n",
-			cdev->dev.bus_id);
+			dev_name(&cdev->dev));
 		rc = -ENODEV;
 		dasd_set_target_state(device, DASD_STATE_NEW);
 		if (device->block)
@@ -2267,7 +2267,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
 		dasd_delete_device(device);
 	} else
 		pr_debug("dasd_generic device %s found\n",
-				cdev->dev.bus_id);
+				dev_name(&cdev->dev));
 
 	/* FIXME: we have to wait for the root device but we don't want
 	 * to wait for each single device but for all at once. */
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index 5c6e6f331cb..b8f9c00633f 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -1397,7 +1397,7 @@ static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
 			DEV_MESSAGE(KERN_ERR, cqr->startdev,
 				    "ERP on alias device for request %p,"
 				    " recover on base device %s", cqr,
-				    cqr->block->base->cdev->dev.bus_id);
+				    dev_name(&cqr->block->base->cdev->dev));
 		}
 		dasd_eckd_reset_ccw_to_base_io(cqr);
 		erp->startdev = cqr->block->base;
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index cd3335c1c30..921443b01d1 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -515,9 +515,9 @@ dasd_devmap_from_cdev(struct ccw_device *cdev)
 {
 	struct dasd_devmap *devmap;
 
-	devmap = dasd_find_busid(cdev->dev.bus_id);
+	devmap = dasd_find_busid(dev_name(&cdev->dev));
 	if (IS_ERR(devmap))
-		devmap = dasd_add_busid(cdev->dev.bus_id,
+		devmap = dasd_add_busid(dev_name(&cdev->dev),
 					DASD_FEATURE_DEFAULT);
 	return devmap;
 }
@@ -584,7 +584,7 @@ dasd_delete_device(struct dasd_device *device)
 	unsigned long flags;
 
 	/* First remove device pointer from devmap. */
-	devmap = dasd_find_busid(device->cdev->dev.bus_id);
+	devmap = dasd_find_busid(dev_name(&device->cdev->dev));
 	BUG_ON(IS_ERR(devmap));
 	spin_lock(&dasd_devmap_lock);
 	if (devmap->device != device) {
@@ -674,7 +674,7 @@ dasd_ro_show(struct device *dev, struct device_attribute *attr, char *buf)
 	struct dasd_devmap *devmap;
 	int ro_flag;
 
-	devmap = dasd_find_busid(dev->bus_id);
+	devmap = dasd_find_busid(dev_name(dev));
 	if (!IS_ERR(devmap))
 		ro_flag = (devmap->features & DASD_FEATURE_READONLY) != 0;
 	else
@@ -723,7 +723,7 @@ dasd_erplog_show(struct device *dev, struct device_attribute *attr, char *buf)
 	struct dasd_devmap *devmap;
 	int erplog;
 
-	devmap = dasd_find_busid(dev->bus_id);
+	devmap = dasd_find_busid(dev_name(dev));
 	if (!IS_ERR(devmap))
 		erplog = (devmap->features & DASD_FEATURE_ERPLOG) != 0;
 	else
@@ -770,7 +770,7 @@ dasd_use_diag_show(struct device *dev, struct device_attribute *attr, char *buf)
 	struct dasd_devmap *devmap;
 	int use_diag;
 
-	devmap = dasd_find_busid(dev->bus_id);
+	devmap = dasd_find_busid(dev_name(dev));
 	if (!IS_ERR(devmap))
 		use_diag = (devmap->features & DASD_FEATURE_USEDIAG) != 0;
 	else
@@ -876,7 +876,7 @@ dasd_alias_show(struct device *dev, struct device_attribute *attr, char *buf)
 	struct dasd_devmap *devmap;
 	int alias;
 
-	devmap = dasd_find_busid(dev->bus_id);
+	devmap = dasd_find_busid(dev_name(dev));
 	spin_lock(&dasd_devmap_lock);
 	if (IS_ERR(devmap) || strlen(devmap->uid.vendor) == 0) {
 		spin_unlock(&dasd_devmap_lock);
@@ -899,7 +899,7 @@ dasd_vendor_show(struct device *dev, struct device_attribute *attr, char *buf)
 	struct dasd_devmap *devmap;
 	char *vendor;
 
-	devmap = dasd_find_busid(dev->bus_id);
+	devmap = dasd_find_busid(dev_name(dev));
 	spin_lock(&dasd_devmap_lock);
 	if (!IS_ERR(devmap) && strlen(devmap->uid.vendor) > 0)
 		vendor = devmap->uid.vendor;
@@ -924,7 +924,7 @@ dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf)
 	char ua_string[3];
 	struct dasd_uid *uid;
 
-	devmap = dasd_find_busid(dev->bus_id);
+	devmap = dasd_find_busid(dev_name(dev));
 	spin_lock(&dasd_devmap_lock);
 	if (IS_ERR(devmap) || strlen(devmap->uid.vendor) == 0) {
 		spin_unlock(&dasd_devmap_lock);
@@ -972,7 +972,7 @@ dasd_eer_show(struct device *dev, struct device_attribute *attr, char *buf)
 	struct dasd_devmap *devmap;
 	int eer_flag;
 
-	devmap = dasd_find_busid(dev->bus_id);
+	devmap = dasd_find_busid(dev_name(dev));
 	if (!IS_ERR(devmap) && devmap->device)
 		eer_flag = dasd_eer_enabled(devmap->device);
 	else
@@ -1034,7 +1034,7 @@ dasd_get_uid(struct ccw_device *cdev, struct dasd_uid *uid)
 {
 	struct dasd_devmap *devmap;
 
-	devmap = dasd_find_busid(cdev->dev.bus_id);
+	devmap = dasd_find_busid(dev_name(&cdev->dev));
 	if (IS_ERR(devmap))
 		return PTR_ERR(devmap);
 	spin_lock(&dasd_devmap_lock);
@@ -1057,7 +1057,7 @@ dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid)
 {
 	struct dasd_devmap *devmap;
 
-	devmap = dasd_find_busid(cdev->dev.bus_id);
+	devmap = dasd_find_busid(dev_name(&cdev->dev));
 	if (IS_ERR(devmap))
 		return PTR_ERR(devmap);
 
@@ -1077,7 +1077,7 @@ dasd_get_feature(struct ccw_device *cdev, int feature)
 {
 	struct dasd_devmap *devmap;
 
-	devmap = dasd_find_busid(cdev->dev.bus_id);
+	devmap = dasd_find_busid(dev_name(&cdev->dev));
 	if (IS_ERR(devmap))
 		return PTR_ERR(devmap);
 
@@ -1093,7 +1093,7 @@ dasd_set_feature(struct ccw_device *cdev, int feature, int flag)
 {
 	struct dasd_devmap *devmap;
 
-	devmap = dasd_find_busid(cdev->dev.bus_id);
+	devmap = dasd_find_busid(dev_name(&cdev->dev));
 	if (IS_ERR(devmap))
 		return PTR_ERR(devmap);
 
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 773b3fe275b..49f9d221e23 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -6,6 +6,8 @@
  *		    Martin Schwidefsky <schwidefsky@de.ibm.com>
  * Bugreports.to..: <Linux390@de.ibm.com>
  * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
+ * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
+ * Author.........: Nigel Hislop <hislop_nigel@emc.com>
  *
  */
 
@@ -84,7 +86,7 @@ dasd_eckd_probe (struct ccw_device *cdev)
 	if (ret) {
 		printk(KERN_WARNING
 		       "dasd_eckd_probe: could not set ccw-device options "
-		       "for %s\n", cdev->dev.bus_id);
+		       "for %s\n", dev_name(&cdev->dev));
 		return ret;
 	}
 	ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
@@ -1501,12 +1503,27 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
 		return;
 	}
 
-	/* just report other unsolicited interrupts */
-	DEV_MESSAGE(KERN_DEBUG, device, "%s",
-		    "unsolicited interrupt received");
-	device->discipline->dump_sense(device, NULL, irb);
-	dasd_schedule_device_bh(device);
+	if ((irb->scsw.cmd.cc == 1) &&
+	    (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
+	    (irb->scsw.cmd.actl & SCSW_ACTL_START_PEND) &&
+	    (irb->scsw.cmd.stctl & SCSW_STCTL_STATUS_PEND)) {
+		/* fake irb do nothing, they are handled elsewhere */
+		dasd_schedule_device_bh(device);
+		return;
+	}
+
+	if (!(irb->esw.esw0.erw.cons)) {
+		/* just report other unsolicited interrupts */
+		DEV_MESSAGE(KERN_ERR, device, "%s",
+			    "unsolicited interrupt received");
+	} else {
+		DEV_MESSAGE(KERN_ERR, device, "%s",
+			    "unsolicited interrupt received "
+			    "(sense available)");
+		device->discipline->dump_sense(device, NULL, irb);
+	}
 
+	dasd_schedule_device_bh(device);
 	return;
 };
 
@@ -2068,6 +2085,103 @@ dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
 	return 0;
 }
 
+/*
+ * Issue syscall I/O to EMC Symmetrix array.
+ * CCWs are PSF and RSSD
+ */
+static int dasd_symm_io(struct dasd_device *device, void __user *argp)
+{
+	struct dasd_symmio_parms usrparm;
+	char *psf_data, *rssd_result;
+	struct dasd_ccw_req *cqr;
+	struct ccw1 *ccw;
+	int rc;
+
+	/* Copy parms from caller */
+	rc = -EFAULT;
+	if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
+		goto out;
+#ifndef CONFIG_64BIT
+	/* Make sure pointers are sane even on 31 bit. */
+	if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
+		rc = -EINVAL;
+		goto out;
+	}
+#endif
+	/* alloc I/O data area */
+	psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
+	rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
+	if (!psf_data || !rssd_result) {
+		rc = -ENOMEM;
+		goto out_free;
+	}
+
+	/* get syscall header from user space */
+	rc = -EFAULT;
+	if (copy_from_user(psf_data,
+			   (void __user *)(unsigned long) usrparm.psf_data,
+			   usrparm.psf_data_len))
+		goto out_free;
+
+	/* sanity check on syscall header */
+	if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
+		rc = -EINVAL;
+		goto out_free;
+	}
+
+	/* setup CCWs for PSF + RSSD */
+	cqr = dasd_smalloc_request("ECKD", 2 , 0, device);
+	if (IS_ERR(cqr)) {
+		DEV_MESSAGE(KERN_WARNING, device, "%s",
+			"Could not allocate initialization request");
+		rc = PTR_ERR(cqr);
+		goto out_free;
+	}
+
+	cqr->startdev = device;
+	cqr->memdev = device;
+	cqr->retries = 3;
+	cqr->expires = 10 * HZ;
+	cqr->buildclk = get_clock();
+	cqr->status = DASD_CQR_FILLED;
+
+	/* Build the ccws */
+	ccw = cqr->cpaddr;
+
+	/* PSF ccw */
+	ccw->cmd_code = DASD_ECKD_CCW_PSF;
+	ccw->count = usrparm.psf_data_len;
+	ccw->flags |= CCW_FLAG_CC;
+	ccw->cda = (__u32)(addr_t) psf_data;
+
+	ccw++;
+
+	/* RSSD ccw  */
+	ccw->cmd_code = DASD_ECKD_CCW_RSSD;
+	ccw->count = usrparm.rssd_result_len;
+	ccw->flags = CCW_FLAG_SLI ;
+	ccw->cda = (__u32)(addr_t) rssd_result;
+
+	rc = dasd_sleep_on(cqr);
+	if (rc)
+		goto out_sfree;
+
+	rc = -EFAULT;
+	if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
+			   rssd_result, usrparm.rssd_result_len))
+		goto out_sfree;
+	rc = 0;
+
+out_sfree:
+	dasd_sfree_request(cqr, cqr->memdev);
+out_free:
+	kfree(rssd_result);
+	kfree(psf_data);
+out:
+	DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
+	return rc;
+}
+
 static int
 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
 {
@@ -2086,6 +2200,8 @@ dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
 		return dasd_eckd_reserve(device);
 	case BIODASDSLCK:
 		return dasd_eckd_steal_lock(device);
+	case BIODASDSYMMIO:
+		return dasd_symm_io(device, argp);
 	default:
 		return -ENOIOCTLCMD;
 	}
@@ -2145,13 +2261,13 @@ static void dasd_eckd_dump_sense(struct dasd_device *device,
 	/* dump the sense data */
 	len = sprintf(page,  KERN_ERR PRINTK_HEADER
 		      " I/O status report for device %s:\n",
-		      device->cdev->dev.bus_id);
+		      dev_name(&device->cdev->dev));
 	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 		       " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
 		       irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
 	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 		       " device %s: Failing CCW: %p\n",
-		       device->cdev->dev.bus_id,
+		       dev_name(&device->cdev->dev),
 		       (void *) (addr_t) irb->scsw.cmd.cpa);
 	if (irb->esw.esw0.erw.cons) {
 		for (sl = 0; sl < 4; sl++) {
diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c
index bf512ac75b9..892e2878d61 100644
--- a/drivers/s390/block/dasd_eer.c
+++ b/drivers/s390/block/dasd_eer.c
@@ -309,7 +309,8 @@ static void dasd_eer_write_standard_trigger(struct dasd_device *device,
 	do_gettimeofday(&tv);
 	header.tv_sec = tv.tv_sec;
 	header.tv_usec = tv.tv_usec;
-	strncpy(header.busid, device->cdev->dev.bus_id, DASD_EER_BUSID_SIZE);
+	strncpy(header.busid, dev_name(&device->cdev->dev),
+		DASD_EER_BUSID_SIZE);
 
 	spin_lock_irqsave(&bufferlock, flags);
 	list_for_each_entry(eerb, &bufferlist, list) {
@@ -349,7 +350,8 @@ static void dasd_eer_write_snss_trigger(struct dasd_device *device,
 	do_gettimeofday(&tv);
 	header.tv_sec = tv.tv_sec;
 	header.tv_usec = tv.tv_usec;
-	strncpy(header.busid, device->cdev->dev.bus_id, DASD_EER_BUSID_SIZE);
+	strncpy(header.busid, dev_name(&device->cdev->dev),
+		DASD_EER_BUSID_SIZE);
 
 	spin_lock_irqsave(&bufferlock, flags);
 	list_for_each_entry(eerb, &bufferlist, list) {
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index aa0c533423a..93d9b6452a9 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -451,13 +451,13 @@ dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
 	}
 	len = sprintf(page, KERN_ERR PRINTK_HEADER
 		      " I/O status report for device %s:\n",
-		      device->cdev->dev.bus_id);
+		      dev_name(&device->cdev->dev));
 	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 		       " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
 		       irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
 	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 		       " device %s: Failing CCW: %p\n",
-		       device->cdev->dev.bus_id,
+		       dev_name(&device->cdev->dev),
 		       (void *) (addr_t) irb->scsw.cmd.cpa);
 	if (irb->esw.esw0.erw.cons) {
 		for (sl = 0; sl < 4; sl++) {
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 31ecaa4a40e..489d5fe488f 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -126,7 +126,7 @@ do { \
 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
 do { \
 	printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
-	       d_device->cdev->dev.bus_id, d_args); \
+	       dev_name(&d_device->cdev->dev), d_args); \
 	DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
 } while(0)
 
@@ -140,7 +140,7 @@ do { \
 #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
 do { \
 	printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
-	       d_device->cdev->dev.bus_id, d_args); \
+	       dev_name(&d_device->cdev->dev), d_args); \
 } while(0)
 
 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index e3b5c4d3036..9088de84b45 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -67,7 +67,7 @@ dasd_devices_show(struct seq_file *m, void *v)
 		return 0;
 	}
 	/* Print device number. */
-	seq_printf(m, "%s", device->cdev->dev.bus_id);
+	seq_printf(m, "%s", dev_name(&device->cdev->dev));
 	/* Print discipline string. */
 	if (device != NULL && device->discipline != NULL)
 		seq_printf(m, "(%s)", device->discipline->name);
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 9481e4a3f76..a7ff167d5b8 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -31,7 +31,6 @@
 #define PRINT_WARN(x...)  printk(KERN_WARNING DCSSBLK_NAME " warning: " x)
 #define PRINT_ERR(x...)	  printk(KERN_ERR DCSSBLK_NAME " error: " x)
 
-
 static int dcssblk_open(struct inode *inode, struct file *filp);
 static int dcssblk_release(struct inode *inode, struct file *filp);
 static int dcssblk_make_request(struct request_queue *q, struct bio *bio);
@@ -48,6 +47,30 @@ static struct block_device_operations dcssblk_devops = {
 	.direct_access 	= dcssblk_direct_access,
 };
 
+struct dcssblk_dev_info {
+	struct list_head lh;
+	struct device dev;
+	char segment_name[BUS_ID_SIZE];
+	atomic_t use_count;
+	struct gendisk *gd;
+	unsigned long start;
+	unsigned long end;
+	int segment_type;
+	unsigned char save_pending;
+	unsigned char is_shared;
+	struct request_queue *dcssblk_queue;
+	int num_of_segments;
+	struct list_head seg_list;
+};
+
+struct segment_info {
+	struct list_head lh;
+	char segment_name[BUS_ID_SIZE];
+	unsigned long start;
+	unsigned long end;
+	int segment_type;
+};
+
 static ssize_t dcssblk_add_store(struct device * dev, struct device_attribute *attr, const char * buf,
 				  size_t count);
 static ssize_t dcssblk_remove_store(struct device * dev, struct device_attribute *attr, const char * buf,
@@ -58,30 +81,20 @@ static ssize_t dcssblk_save_show(struct device *dev, struct device_attribute *at