Re: [PATCH][2.5][8/14] smp_call_function_on_cpu - s390

From: Zwane Mwaikambo (zwane@holomorphy.com)
Date: Sat Feb 15 2003 - 17:39:01 EST

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In reply to: Ulrich Weigand: "Re: [PATCH][2.5][8/14] smp_call_function_on_cpu - s390"
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On Sat, 15 Feb 2003, Ulrich Weigand wrote:

> I'm not sure I understand what you mean here. In any case, at least
> on S/390, doing a SIGP to an invalid CPU will simply get you an
> 'not operational' indication (condition code 3), so in fact the
> only problem *is* the busy loop on num_cpus ...

On other architectures it can get nasty if you send an interprocessor
interrupt out onto the bus for an invalid cpu destination.
Since not having the online map will be a problem for you I'll add the
mask = ... & cpu_online_map to cover the concerns you have.

Thanks,
Zwane

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