[PATCH RESEND] ARM: smp_twd: Reconfigure clockevents after cpufreq change

[tglx@linutronix.de (Thomas Gleixner)]

On Fri, 7 Oct 2011, Linus Walleij wrote:

> On Thu, Oct 6, 2011 at 7:25 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> > On Thu, 6 Oct 2011, Linus Walleij wrote:
> >> Here is the entire patch i Russells tracker:
> >> http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=6956/2
> >
> > The only thing what puzzles me is:
> >
> >> + ? ? if (!IS_ERR_OR_NULL(twd_clk))
> >> + ? ? ? ? ? ? twd_timer_rate = clk_get_rate(twd_clk);
> >> + ? ? else
> >> + ? ? ? ? ? ? twd_calibrate_rate();
> >
> > How is made sure that the cpu freq update thing is not called when
> > twd_clk is not available or am I missing something ?
> 
> The CPUfreq transition notifier is only registered if twd_clk is
> not error or NULL in this #ifdef CONFIG_CPU_FREQ snippet
> above that code, but executed later:
> 
> +static int twd_cpufreq_init(void)
> +{
> +	if (!IS_ERR_OR_NULL(twd_clk))
> +		return cpufreq_register_notifier(&twd_cpufreq_nb,
> +			CPUFREQ_TRANSITION_NOTIFIER);
> +
> +	return 0;
> +}
> +core_initcall(twd_cpufreq_init);

Duh. Could have seen that myself :)

Thans for clarification. Please add my Acked-by.

Thanks,

	tglx