Re: [PATCH V2 2/2] cpufreq: Optimize cpufreq_frequency_table_target()

[Viresh Kumar]

On 01-06-16, 12:46, Steve Muckle wrote:
> >  	/*
> >  	 * Find the closest frequency above target_freq.
> > -	 *
> > -	 * The table is sorted in the reverse order with respect to the
> > -	 * frequency and all of the entries are valid (see the initialization).
> >  	 */
> > -	entry = policy->freq_table;
> > -	do {
> > -		entry++;
> > -		freq = entry->frequency;
> > -	} while (freq >= target_freq && freq != CPUFREQ_TABLE_END);
> > -	entry--;
> > +	index = cpufreq_frequency_table_target(policy, target_freq,
> > +					       CPUFREQ_RELATION_L);
> 
> This adds a function call to the fast path...

I understand that, but I am not sure how far should we go to avoid
that. Open coding routines to save on that isn't a good idea surely.

I have at least kept this routine in cpufreq.h to avoid a call, but
eventually we will have at least a call somewhere within it. :(

-- 
viresh