getrusage1
error = getrusage1(p, SCARG(uap, who), &ru);
error = getrusage1(p, who, &ru);
error = getrusage1(p, SCARG(uap, who), &ru);
error = getrusage1(p, SCARG(uap, who), &ru);
error = getrusage1(p, SCARG(uap, who), &ru);
int getrusage1(struct proc *, int, struct rusage *);