On Tue, Nov 21 2023 at 13:44, Russell King wrote:
> ---
> An open question remains from the RFC v2 posting: should we provide a
> __weak stub for !HOTPLUG_CPU as well, since in later patches ACPI may
> reference this if the compiler doesn't optimise as we expect?

You mean:

extern void foo(void);


The kernel uses this pattern for years and if someday a compiler starts
to fail to eliminate the call to 'foo()' for CONFIG_FOO=n then you
already get hundreds linkage fails today.

So adding one more in later patches won't matter much :)

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