* David Howells <[email protected]> wrote:
> +#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
> +#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
> +#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
I think the myriad of arch switches and the resulting #ifdef noise, just
to get rid of a _single_ unused global function, is pretty lame. (and
that's of course not your fault)
The real solution would be to use gcc -ffunction-sections plus ld
--gc-sections to automatically get rid of unused global functions, at
link time. I'm wondering how hard it would be to enhance kbuild to do
that - x86_64 already uses -ffunction-sections (if CONFIG_REORDER), so
the big question is how usable is ld --gc-sections. Such a feature would
be quite important for embedded systems (and for RAM footprint in
general) as it would save a significant amount of .text and .data.
Ingo
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