UREG_I5
err |= __put_user(regs->u_regs[UREG_I5], &((*grp)[MC_O5]));
err |= __get_user(regs->u_regs[UREG_I5], (&(*grp)[MC_O5]));
#define __PT_PARM6_REG u_regs[UREG_I5]