RE: [linux-pm] [PATCH v4] PM: add statistics debugfs file forsuspend to ram

From: Mansoor, Illyas
Date: Wed Aug 10 2011 - 14:00:48 EST

> +struct suspend_stats suspend_stats;
> static DEFINE_MUTEX(dpm_list_mtx);
> static pm_message_t pm_transition;
> @@ -464,8 +465,12 @@ void dpm_resume_noirq(pm_message_t state)
> mutex_unlock(&dpm_list_mtx);
> error = device_resume_noirq(dev, state);
> - if (error)
> + if (error) {
> + suspend_stats.failed_resume_noirq++;
> + dpm_save_failed_step(SUSPEND_RESUME_NOIRQ);
> + dpm_save_failed_dev(dev_name(dev));

Please make these statistics conditionally enabled, so on a production system
If we need to disable these statistics code we should be able to do so.

May be CONFIG_SUSPEND_STATS and convert those lines of code into function calls
That can be stubbed out when the config is not enabled.

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