rsmka_scat_gath_t
sgio_copyin(caddr_t arg, rsmka_scat_gath_t *sg_io, int mode)
if (ddi_copyin(arg, (caddr_t)sg_io, sizeof (rsmka_scat_gath_t),
sgio_resid_copyout(caddr_t arg, rsmka_scat_gath_t *sg_io, int mode)
(caddr_t)&((rsmka_scat_gath_t *)arg)->io_residual_count,
(caddr_t)&((rsmka_scat_gath_t *)arg)->flags,
rsmka_scat_gath_t sg_io;