On Thu, 23 Aug 2007, Satyam Sharma wrote:
>
> I must say, this is an amazingly cunning idea. Only things I can think of
> against this would be: the dropping of unneeded code is not guaranteed,
> but depends on compiler. And we saw from the "static inline {return 0;}"
> testcase that gcc can sometimes be not-so-smart.
Oh, wait. I just stumbled upon arch/i386/kernel/cpu/intel_cacheinfo.c
that references the callback function from generic CPU-initialization
startup code that must get executed even when HOTPLUG_CPU=n. The leave-it-
upto-toolchain method would see this reference, and preserve the function
even after initcalls stage for HOTPLUG_CPU=n. So the explicit __cpuinit
method scores here, admittedly only because of weird taste of said code.
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