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@xxxxxxxxx>: > So, it's just an override? > Why return true and not false? > > Il 21 giu 2016 4:32 AM, "Nathan Williams" <ngwilliams@xxxxxxxxx> 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@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > -- "Do or do not. There is no try" Yoda Master _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
