SYS_compat_50_mknod
{ SYS_compat_50_mknod, 0, (sy_call_t *)compat_50_sys_mknod },
{ SYS_compat_50_mknod, "compat_50" },
error = rsys_syscall(SYS_compat_50_mknod, &callarg, sizeof(callarg), retval);