265,270d264
< 	// Ensure only one update at a time checks resolv.conf.
< 	if !conf.tryAcquireSema() {
< 		return
< 	}
< 	defer conf.releaseSema()
< 
276a271,280
> 	conf.update(name)
> }
> 
> func (conf *resolverConfig) update(name string) {
> 	// Ensure only one update at a time checks resolv.conf.
> 	if !conf.tryAcquireSema() {
> 		return
> 	}
> 	defer conf.releaseSema()
> 
293a298,302
> }
> 
> func UpdateDnsConf() {
> 	resolvConf.initOnce.Do(resolvConf.init)
> 	resolvConf.update("/etc/resolv.conf")