What is the point of this function?

[Andrea Benelli]

Ok, thank you!
Il 22 giu 2016 3:08 PM, "Daniel." <danielhilst at gmail.com> ha scritto:

> The function body you see will be use only when CONFIG_SMP is not
> present. Take a look at
> https://www.kernel.org/doc/Documentation/CodingStyle
> Chapter 20: Conditional Compilation
>
> Regards,
>
> 2016-06-21 8:56 GMT-03:00 Andrea Benelli <andreabenelli77 at gmail.com>:
> > So, it's just an override?
> > Why return true and not false?
> >
> > Il 21 giu 2016 4:32 AM, "Nathan Williams" <ngwilliams at gmail.com> ha
> scritto:
> >>
> >> On Tue, 2016-06-21 at 00:48 +0200, Andrea Benelli wrote:
> >> > Hello, i was looking at the linux/sched.h (kernel version 4.6.2)
> >> > source code and i found this function at line 1174:
> >> >
> >> > static inline bool cpus_share_cache(int this_cpu, int that_cpu)
> >> > {
> >> >         return true;
> >> > }
> >> >
> >> > I'm not able to understand the utility of a function that just return
> >> > a true value.
> >> > i've noticed that there are a lot of functions like this (function
> >> > that just return a constant).
> >>
> >> Hi Andrea,
> >>
> >> That's the case for when CONFIG_SMP isn't defined. What happens when
> >> CONFIG_SMP is defined?
> >>
> >> I suggest having a look through the code with a Linux cross reference:
> >>
> >> http://lxr.free-electrons.com/ident?v=4.6;i=cpus_share_cache
> >>
> >> Regards,
> >> Nathan
> >>
> >
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> >
>
>
>
> --
> "Do or do not. There is no try"
>   Yoda Master
>
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