Function pdhold

freebsd/kern/kern_descrip.c:2211–2221

}

static struct pwddesc *
pdhold(struct proc *p)
{
	struct pwddesc *pdp;

	PROC_LOCK_ASSERT(p, MA_OWNED);
	pdp = p->p_pd;
	if (pdp != NULL)
		refcount_acquire(&pdp->pd_refcount);
	return (pdp);
}

static void
fddrop(struct filedesc *fdp)