linux-kernel - Re: [PATCH 2/2] cpufreq: Separate CPU device removal from CPU online

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 24 Jul 2015 07:49:16 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Linux PM list <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>
Subject: Re: [PATCH 2/2] cpufreq: Separate CPU device removal from CPU online

On 23-07-15, 22:56, Rafael J. Wysocki wrote:
> > > +	if (policy && policy->kobj_cpu != cpu) {
> > 
> > Why are you comparing cpu against kobj_cpu ? I don't think it can ever
> > be false.

So what I meant was that the expression 'policy->kobj_cpu != cpu' will
never return 'false'. Because policy->kobj_cpu is going to get set to
the cpu for which we allocated the policy. And so it wouldn't match
for any other CPU.

> It can.  When we're adding a CPU that has a policy already, because it is
> "related" to a previously registered CPU.

In this case also the expression will return true.

> > > +		ret = sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq");
> > > +		if (ret) {
> > > +			dev_dbg(dev, "%s: Failed to create link (%d)\n",
> > 
> > dev_err
> 
> Well, I'm wondering about this.  Why does this have to be dev_err()?

Isn't this an error? We need to create a symlink, we failed and
atleast the user should know about it. Why hide such failures ?

-- 
viresh
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/