SYS_compat_50_kevent
{ SYS_compat_50_kevent, 0, (sy_call_t *)compat_50_sys_kevent },
{ SYS_compat_50_kevent, "compat_50" },
error = rsys_syscall(SYS_compat_50_kevent, &callarg, sizeof(callarg), retval);