HAL (as used in Redhat Linux, version 0.2.97.cvs20040823) prints out this 
message when running recent -mm Linux kernels:

"Aug 26 20:24:58 tornado kernel: program hald is using a deprecated SCSI 
ioctl, please convert it to SG_IO"

Actually, it spews out lots of copies of this message to the console ;-)

The code which generates this message in the kernel in 
drivers/scsi/scsi_ioctl.c states:

        /* 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;
        }

As most of the code in -mm and the scsi bk tree, eventually it is likely to 
get merged into mainline, it may be worthwhile to start using the new ioctl's 
in HAL sooner rather than later..