On 04/02/2012 06:18 PM, Daniel Lezcano wrote:
> The usual cpuidle initialization routines are to register the
> driver, then register a cpuidle device per cpu.
>
> With the device's state count default initialization with the
> driver's state count, the code initialization remains mostly the
> same in the different drivers.
>
> We can then add a new function 'cpuidle_register' where we register
> the driver and the devices. These devices can be defined in a global
> static variable in cpuidle.c. We will be able to factor out and
> remove a lot of duplicate lines of code.
>
> As we still have some drivers, with different initialization routines,
> we keep 'cpuidle_register_driver' and 'cpuidle_register_device' as low
> level initialization routines to do some specific operations on the
> cpuidle devices.
>
> Signed-off-by: Daniel Lezcano <daniel.lezc...@linaro.org>
> +/*
> + * cpuidle_register : register cpuidle driver and devices
> + * Note this function must be called after smp_init.
> + * @drv : the cpuidle driver
> + * Returns 0 on success, < 0 otherwise
> + */
> +int cpuidle_register(struct cpuidle_driver *drv)
> +{
> + int ret, cpu, i;
> + struct cpuidle_device *dev;
> +
> + ret = cpuidle_register_driver(drv);
> + if (ret)
> + return ret;
> +
> + for_each_online_cpu(cpu) {
> + dev = &per_cpu(cpuidle_device, cpu);
> + dev->cpu = cpu;
> +
> + ret = cpuidle_register_device(dev);
> + if (ret)
> + goto out_unregister;
> + }
> +
> +out:
> + return ret;
> +
> +out_unregister:
> + for_each_online_cpu(i) {
> + if (i == cpu)
> + break;
> + dev = &per_cpu(cpuidle_device, cpu);
^^^
That must have been "i" instead of "cpu"...
> + cpuidle_unregister_device(dev);
> + }
> +
> + cpuidle_unregister_driver(drv);
> +
> + goto out;
> +}
> +EXPORT_SYMBOL_GPL(cpuidle_register);
> +
Regards,
Srivatsa S. Bhat
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