linux-kernel - Re: [PATCH V4 1/2] cpufreq: ondemand: allow custom powersave_bias

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:	Thu, 4 Apr 2013 22:06:35 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Jacob Shin <jacob.shin@....com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, cpufreq@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Thomas Renninger <trenn@...e.de>,
	Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH V4 1/2] cpufreq: ondemand: allow custom
 powersave_bias_target handler to be registered

On 4 April 2013 21:49, Jacob Shin <jacob.shin@....com> wrote:
> diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c

> +static void od_set_powersave_bias(unsigned int powersave_bias)
> +{
> +       unsigned int cpu;
> +       struct od_dbs_tuners *od_tuners;
> +
> +       if (!have_governor_per_policy()) {
> +               od_tuners = od_dbs_cdata.gdbs_data->tuners;
> +               od_tuners->powersave_bias = powersave_bias;
> +               return;
> +       }
> +
> +       for_each_online_cpu(cpu) {
> +               struct cpufreq_policy *policy;
> +               struct dbs_data *dbs_data;
> +               policy = per_cpu(od_cpu_dbs_info, cpu).cdbs.cur_policy;
> +               dbs_data = policy->governor_data;
> +               od_tuners = dbs_data->tuners;
> +               od_tuners->powersave_bias = powersave_bias;
> +       }

You can keep only the for_each_online_cpu() loop and remove the other
one. And in that one also, you don't have to do this for every cpu...

something like this will help you...

cpus_processed = NULL;

for_each_online_cpu(cpu) {
    if cpu-is-present-in cpus_processed
        continue;

    cpu-set-mask(cpus_processed, policy->cpus);

}

Syntax is poor, please choose the correct one.

> +}
--
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/