On Mon, 20 Aug 2007 22:03:28 -0700 Andrew Morton <[email protected]> wrote:
> register_hotcpu_notifier() is cunning. If CONFIG_HOTPLUG_CPU=y, we need
> the notifier block and the function to which it points to be in .data and
> in .text. If CONFIG_HOTPLUG_CPU=n, we don't need them to be present at all.
>
> So what we can do is to just leave the notifier block in .data and the
> function in .text and then the compiler/linker will notice that nothing
> references them and they will be omitted at build time.
As long as the notifier block and the function are static. I don't think
the toolchain is smart enough to remove them if they have global scope,
but I didn't check this..
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