ctl_kern_sg_entries
for (i = 0; i < ctl_kern_sg_entries(io); i++)
if (ctl_kern_sg_entries(io) == 0) {
msg.dt.kern_sg_entries = ctl_kern_sg_entries(io);
if (ctl_kern_sg_entries(io) > 0)
if (ctl_kern_sg_entries(io) > 0) /* XXX: Implement */