Re: [PATCH] x86 idle APM: delete apm_cpu_idle(), and its use ofpm_idle
From: Ingo Molnar
Date: Thu Mar 31 2011 - 02:56:44 EST
* Len Brown <lenb@xxxxxxxxxx> wrote:
> From: Len Brown <len.brown@xxxxxxxxx>
>
> There is some doubt whether the APM idle feature
> to call into the BIOS from the idle loop is reliable.
> Certainly it was known to fail on some machines,
> but more importantly, APM machines have not shipped
> for a decade and so finding machines to test the code
> is problematic.
>
> After this patch, systems running in APM mode will
> simply run default_idle() and HALT without calling
> into the BIOS from their idle loop.
>
> This deletes a much-maligned modular user of the (pm_idle)()
> function pointer.
>
> Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
Ok, this should have far less negative impact on old hardware.
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Thanks,
Ingo
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