sigclearall
sigclearall(p, &contsigmask, &kq);
sigclearall(p, &contsigmask, &kq);
sigclearall(p, NULL, &kq);
sigclearall(p, &tset, &kq);
sigclearall(p, &tset, &kq);
void sigclearall(struct proc *, const sigset_t *, ksiginfoq_t *);
sigclearall(p, NULL, &kq);