What is the point of this function?

[Daniel.]

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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