Ok, thank you! Il 22 giu 2016 3:08 PM, "Daniel." <danielhi...@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 <andreabenell...@gmail.com>: > > So, it's just an override? > > Why return true and not false? > > > > Il 21 giu 2016 4:32 AM, "Nathan Williams" <ngwilli...@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 > >> > > > > _______________________________________________ > > Kernelnewbies mailing list > > Kernelnewbies@kernelnewbies.org > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > > > > -- > "Do or do not. There is no try" > Yoda Master >
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