get the kernel to warn about deprecated SCSI ioctls

The non unique SCSI ioctls:

SCSI_IOCTL_SEND_COMMAND
SCSI_IOCTL_TEST_UNIT_READY
SCSI_IOCTL_BENCHMARK_COMMAND
SCSI_IOCTL_SYNC
SCSI_IOCTL_START_UNIT
SCSI_IOCTL_STOP_UNIT

Have been deprecated for a while now.  We should make the kernel
complain when a program actually uses one of them, so users have had
adequate warning before they are removed.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/block/scsi_ioctl.c

@@ -426,6 +426,7 @@ int scsi_cmd_ioctl(struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
 		 * old junk scsi send command ioctl
 		 */
 		case SCSI_IOCTL_SEND_COMMAND:
+			printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
 			err = -EINVAL;
 			if (!arg)
 				break;

drivers/scsi/scsi_ioctl.c

@@ -391,6 +391,21 @@ int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
 	if (!scsi_block_when_processing_errors(sdev))
 		return -ENODEV;
 
+	/* Check for deprecated ioctls ... all the ioctls which don't
+	 * follow the new unique numbering scheme are deprecated */
+	switch (cmd) {
+	case SCSI_IOCTL_SEND_COMMAND:
+	case SCSI_IOCTL_TEST_UNIT_READY:
+	case SCSI_IOCTL_BENCHMARK_COMMAND:
+	case SCSI_IOCTL_SYNC:
+	case SCSI_IOCTL_START_UNIT:
+	case SCSI_IOCTL_STOP_UNIT:
+		printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
+		break;
+	default:
+		break;
+	}
+
 	switch (cmd) {
 	case SCSI_IOCTL_GET_IDLUN:
 		if (verify_area(VERIFY_WRITE, arg, sizeof(struct scsi_idlun)))