crhold
crhold(fp->f_cred);
crhold(cred);
crhold(p->p_ucred);
crhold(pr->ps_ucred);
crhold(newcred);
crhold(cred);
crhold(cred);
crhold(p->p_ucred);
crhold(cred);
sigio->sio_ucred = crhold(p->p_ucred);
newsigio->sio_ucred = crhold(sigio->sio_ucred);
upp->pr_ucred = crhold(p->p_ucred);
crhold(upp->pr_ucred);
crhold(cred);
crhold(cred);
crhold(np->n_rcred);
crhold(np->n_wcred);
struct ucred *crhold(struct ucred *);
crhold(p->p_ucred);
crhold(p->p_ucred);
crhold(ump->um_cred[type]);