e = find_entry (fid);
e = find_entry_nolock (fid);
fcache_stale_entry (VenusFid fid, AFSCallBack callback){    FCacheEntry *e;    e = find_entry (fid);    if (e == NULL) {	arla_warnx (ADEBFCACHE,		    "callback for non-existing file (%d, %u, %u, %u)",		    fid.Cell, fid.fid.Volume, fid.fid.Vnode, fid.fid.Unique);	return;    }    ReleaseWriteLock(&e->lock);    stale (e, callback);}