Re[2]: [PATCH] clocksource: Add pointer to clocksource structure in read function

Alexander Shiyan shc_work at mail.ru
Mon Apr 22 12:22:39 EDT 2013


> On 18:19 Mon 22 Apr     , Alexander Shiyan wrote:
> > > On 13:13 Mon 22 Apr     , Alexander Shiyan wrote:
> > > > > On 10:35 Sat 20 Apr     , Alexander Shiyan wrote:
> > > > > > 
> > > > > > This patch adds pointer to clocksource structure in read function.
> > > > > > For avoid name collisions, clocksource names for all drivers was
> > > > > > changed to be unique.
> > > > > why?
> > > > > 
> > > > > no need the clocksource is hot path don't touch it
> > > > > and we do not need the struct pointer as we can have only 1 cs in barebox
> > > > 
> > > > This change allows to add an additional field in struct clocksource then
> > > > we can remove static variables from clocksource drivers.
> > > why we have only one clocksource at a time
> > > what you propose will require to use container_of
> > > 
> > > so will slow down a lot barebox
> > 
> > I hope to see any comments about this patch from Sascha.
> > Of course, we have only one instance of clocksource, but generally
> > direction of this patch is avoid of usage static variables in clocksource drivers.
> > With path we can remove all usage. Is this not good for you?
> if this result by increase the instruction to execute it's worth

If parameter is not used by unit I think compiler should
compile this as before. E.g. whithout an additioal code.

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