knote_fdclose
knote_fdclose(delfp, fdp, new);
knote_fdclose(fp, fdp, fd);
knote_fdclose(fp, fdp, n); /* XXX */
knote_fdclose(fp, fdp, i);
knote_fdclose(fp, fdp, i);
knote_fdclose(fp, fdp, i);
void knote_fdclose(struct file *, struct filedesc *, int);