xen-pciback: Replace scnprintf() with sysfs_emit_at()

This is the third revision (v3) of this patch series.
No changes since v2—only adding Reviewed-by lines.

Reviewed-by: Juergen Gross <[e-mail]>
Signed-off-by: Ryan Chung <[e-mail]>
Signed-off-by: Juergen Gross <[e-mail]>
Message-ID: <[e-mail]>

drivers/xen/xen-pciback/pci_stub.c

···
 		if (count >= PAGE_SIZE)
 			break;
 
-		count += scnprintf(buf + count, PAGE_SIZE - count,
+		count += sysfs_emit_at(buf, count,
 				   "%04x:%02x:%02x.%d\n",
 				   pci_dev_id->domain, pci_dev_id->bus,
 				   PCI_SLOT(pci_dev_id->devfn),
···
 		if (!dev_data)
 			continue;
 		count +=
-		    scnprintf(buf + count, PAGE_SIZE - count,
+		    sysfs_emit_at(buf, count,
 			      "%s:%s:%sing:%ld\n",
 			      pci_name(psdev->dev),
 			      dev_data->isr_on ? "on" : "off",
···
 		if (count >= PAGE_SIZE)
 			goto out;
 
-		count += scnprintf(buf + count, PAGE_SIZE - count,
+		count += sysfs_emit_at(buf, count,
 				   "%02x:%02x.%01x\n\t%04x:%04x:%04x:%04x\n",
 				   quirk->pdev->bus->number,
 				   PCI_SLOT(quirk->pdev->devfn),
···
 			if (count >= PAGE_SIZE)
 				goto out;
 
-			count += scnprintf(buf + count, PAGE_SIZE - count,
+			count += sysfs_emit_at(buf, count,
 					   "\t\t%08x:%01x:%08x\n",
 					   cfg_entry->base_offset +
 					   field->offset, field->size,
···
 		if (!dev_data || !dev_data->permissive)
 			continue;
 		count +=
-		    scnprintf(buf + count, PAGE_SIZE - count, "%s\n",
+		    sysfs_emit_at(buf, count, "%s\n",
 			      pci_name(psdev->dev));
 	}
 	spin_unlock_irqrestore(&pcistub_devices_lock, flags);
···
 		if (!dev_data || !dev_data->allow_interrupt_control)
 			continue;
 		count +=
-		    scnprintf(buf + count, PAGE_SIZE - count, "%s\n",
+		    sysfs_emit_at(buf, count, "%s\n",
 			      pci_name(psdev->dev));
 	}
 	spin_unlock_irqrestore(&pcistub_devices_lock, flags);