Messages in this thread | | | Date | Wed, 19 Aug 2015 17:08:17 +0530 | Subject | Re: [PATCH] thermal: cpu_cooling: Remove usage of devm functions | From | Vaishali Thakkar <> |
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On Wed, Aug 19, 2015 at 1:54 PM, Viresh Kumar <viresh.kumar@linaro.org> wrote: > On Wed, Aug 19, 2015 at 11:52 AM, Vaishali Thakkar > <vthakkar1994@gmail.com> wrote: >> In the function cpufreq_get_requested_power, the memory allocated >> for load_cpu is live within the function only. And after the >> allocation it is immediately freed with devm_kfree. There is no >> need to allocate memory for load_cpu with devm function so replace >> devm_kcalloc with kcalloc and devm_kfree with kfree. >> >> Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com> >> --- >> This patch is having one checkpatch.pl warning which suggests that >> kfree(NULL) is safe. But I think leaving code with if is nice >> because it reflects the fact that kcalloc was under an if. So, I >> have ignored checkpatch. If maintainer wants me to go for changing >> things, I am fine with it too. > > I will rather ask you to do this:
Ok. I was not sure about introducing new label. Thanks.
I will send v2 with the changes you pointed.
> diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c > index 620dcd405ff6..a04055ea5d94 100644 > --- a/drivers/thermal/cpu_cooling.c > +++ b/drivers/thermal/cpu_cooling.c > @@ -584,8 +584,8 @@ static int cpufreq_get_requested_power(struct > thermal_cooling_device *cdev, > if (trace_thermal_power_cpu_get_power_enabled()) { > u32 ncpus = cpumask_weight(&cpufreq_device->allowed_cpus); > > - load_cpu = devm_kcalloc(&cdev->device, ncpus, sizeof(*load_cpu), > - GFP_KERNEL); > + load_cpu = kcalloc(&cdev->device, ncpus, sizeof(*load_cpu), > + GFP_KERNEL); > } > > for_each_cpu(cpu, &cpufreq_device->allowed_cpus) { > @@ -607,22 +607,20 @@ static int cpufreq_get_requested_power(struct > thermal_cooling_device *cdev, > > dynamic_power = get_dynamic_power(cpufreq_device, freq); > ret = get_static_power(cpufreq_device, tz, freq, &static_power); > - if (ret) { > - if (load_cpu) > - devm_kfree(&cdev->device, load_cpu); > - return ret; > - } > + if (ret) > + goto free; > > - if (load_cpu) { > + if (load_cpu) > trace_thermal_power_cpu_get_power( > &cpufreq_device->allowed_cpus, > freq, load_cpu, i, dynamic_power, static_power); > > - devm_kfree(&cdev->device, load_cpu); > - } > - > *power = static_power + dynamic_power; > - return 0; > + > +free: > + kfree(&cdev->device, load_cpu); > + > + return ret; > }
-- Vaishali
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