sys_kevent
{ .sy_narg = AS(kevent_args), .sy_call = (sy_call_t *)sys_kevent, .sy_auevent = AUE_KEVENT, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC }, /* 560 = kevent */
int sys_kevent(struct thread *, struct kevent_args *);