linux-kernel - Re: [PATCH v4 6/7] arm64: use activity monitors for frequency invariance

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Message-ID: <20200226102210.GB19513@arm.com>
Date:   Wed, 26 Feb 2020 10:22:10 +0000
From:   Ionela Voinescu <ionela.voinescu@....com>
To:     Pavan Kondeti <pkondeti@...eaurora.org>
Cc:     catalin.marinas@....com, will@...nel.org, mark.rutland@....com,
        maz@...nel.org, suzuki.poulose@....com, sudeep.holla@....com,
        lukasz.luba@....com, valentin.schneider@....com,
        dietmar.eggemann@....com, rjw@...ysocki.net, peterz@...radead.org,
        mingo@...hat.com, vincent.guittot@...aro.org,
        viresh.kumar@...aro.org, linux-arm-kernel@...ts.infradead.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v4 6/7] arm64: use activity monitors for frequency
 invariance

Hi Pavan,

On Wednesday 26 Feb 2020 at 15:21:34 (+0530), Pavan Kondeti wrote:
> On Mon, Feb 24, 2020 at 02:11:41PM +0000, Ionela Voinescu wrote:
> 
> [...]
> 
> > +static int __init init_amu_fie(void)
> > +{
> > +	cpumask_var_t valid_cpus;
> > +	bool have_policy = false;
> > +	int cpu;
> > +
> > +	if (!zalloc_cpumask_var(&valid_cpus, GFP_KERNEL) ||
> > +	    !zalloc_cpumask_var(&amu_fie_cpus, GFP_KERNEL))
> > +		return -ENOMEM;
> 
> The patch looks good to me. one minor comment here. In an unlikely
> scenario, valid_cpus which is a temporary mask can get allocated
> but amu_fie_cpus may not. In that case, we have to free valid_cpus
> here. I have seen some static code inspection tools catching these
> type of errors. If you happen to rebase this series, fix this.
> 

Thank you for the review!

I am just about to push v5 and I'll add this fix as well.

Thank you,
Ionela.

> Thanks,
> Pavan
> 
> -- 
> Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.