On Sat, Mar 7, 2015 at 1:50 AM, Ingo Molnar <mi...@kernel.org> wrote:
>
> * John Stultz <john.stu...@linaro.org> wrote:
>
>> Print the mask, max_cycles, and max_idle_ns values for clocksources
>> being registered.
>>
>> Cc: Dave Jones <da...@codemonkey.org.uk>
>> Cc: Linus Torvalds <torva...@linux-foundation.org>
>> Cc: Thomas Gleixner <t...@linutronix.de>
>> Cc: Richard Cochran <richardcoch...@gmail.com>
>> Cc: Prarit Bhargava <pra...@redhat.com>
>> Cc: Stephen Boyd <sb...@codeaurora.org>
>> Cc: Ingo Molnar <mi...@kernel.org>
>> Cc: Peter Zijlstra <pet...@infradead.org>
>> Signed-off-by: John Stultz <john.stu...@linaro.org>
>> ---
>> kernel/time/clocksource.c | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
>> index 3f24bb3..9b75316 100644
>> --- a/kernel/time/clocksource.c
>> +++ b/kernel/time/clocksource.c
>> @@ -697,6 +697,10 @@ void __clocksource_updatefreq_scale(struct clocksource
>> *cs, u32 scale, u32 freq)
>
> So that name should really be something like
> __clocksource_update_freq_scale(),
> right?
Sure, I can add an extra patch to address that...
>> cs->max_idle_ns = clocks_calc_max_nsecs(cs->mult, cs->shift,
>> cs->maxadj, cs->mask,
>> &cs->max_cycles);
>> +
>> + pr_info("clocksource %s: mask: 0x%llx max_cycles: 0x%llx, max_idle_ns:
>> %lld ns\n",
>> + cs->name, cs->mask, cs->max_cycles, cs->max_idle_ns);
>> +
>
> Also, why is this function exported? No in-tree module uses it.
So, its mostly due to the fact that the inline function
__clocksource_updatefreq_hz() in clocksource.h uses it, which may be
used by some clocksources in their enable() hooks. And those
clocksources may be compiled as a module.
> Also, when I read the code, I noticed:
>
> /**
> * __clocksource_updatefreq_scale - Used update clocksource with new freq
> * @cs: clocksource to be registered
> * @scale: Scale factor multiplied against freq to get clocksource hz
> * @freq: clocksource frequency (cycles per second) divided by scale
> *
> * This should only be called from the clocksource->enable() method.
> *
> * This *SHOULD NOT* be called directly! Please use the
> * clocksource_updatefreq_hz() or clocksource_updatefreq_khz helper functions.
>
> One more reason to not export it?
>
> Also, typo in the description.
>
> Plus, one helper function is marked with '()', the other not ...
I'll address that in the new patch as well.
thanks
-john
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