[PATCH v5 2/4] eal: allow applications to report their cpu usage

[Konstantin Ananyev]

> 
> Konstantin Ananyev, Dec 22, 2022 at 13:41:
> > > +static rte_lcore_usage_cb lcore_usage_cb;
> > > +
> > > +void
> > > +rte_lcore_register_usage_cb(rte_lcore_usage_cb cb)
> > > +{
> > > +	lcore_usage_cb = cb;
> > > +}
> > > +
> >
> > LGTM in general.
> > One question: I assume this function is supposed to be called just
> > once at app init stage, so we probably don't need to worry about
> > possible sync issues, right? If so, then probably worth to mention it
> > in the function formal comments below.
> 
> Yes, this is correct. I'll add a mention in the function docstring to
> explain that this should be called once at init. Also I'll add a comment
> in the function body to indicate that there is no risk of sync issues.

Sounds good to me.
Probably we can even print warning or so if some-one tries to overwrite
it once again.