Function vrefact

freebsd/kern/vfs_subr.c:3025–3036

}

void
vrefact(struct vnode *vp)
{

	CTR2(KTR_VFS, "%s: vp %p", __func__, vp);
#ifdef INVARIANTS
	int old = atomic_fetchadd_int(&vp->v_usecount, 1);
	VNASSERT(old > 0, vp, ("%s: wrong use count %d", __func__, old));
#else
	refcount_acquire(&vp->v_usecount);
#endif
}

void
vlazy(struct vnode *vp)