return (fork1(p, ISFORK, 0, NULL, 0, retval));
return (fork1(p, FORK_FORK, NULL, 0, retval));
sys_fork(p, v, retval)	struct proc *p;	void *v;	register_t *retval;{	return (fork1(p, ISFORK, 0, NULL, 0, retval));}