linux-kernel - Re: [PATCH] x86 microcode: work_on_cpu and cleanup of the synchronization logic

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Date:	Wed, 22 Apr 2009 12:18:11 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Peter Oruba <peter.oruba@....com>,
	Arjan van de Ven <arjan@...radead.org>,
	Hugh Dickins <hugh@...itas.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86 microcode: work_on_cpu and cleanup of the
	synchronization logic


* Dmitry Adamushko <dmitry.adamushko@...il.com> wrote:

> +static long collect_cpu_info_local(void *arg)
> +{
> +	struct collect_for_cpu *cfc = arg;
> +
> +	BUG_ON(cfc->cpu != raw_smp_processor_id());
> +
> +	return microcode_ops->collect_cpu_info(cfc->cpu, cfc->cpu_sig);
> +}
> +
> +static int collect_cpu_info_on_target(int cpu, struct cpu_signature *cpu_sig)
> +{
> +	struct collect_for_cpu cfc = { .cpu_sig = cpu_sig, .cpu = cpu };
> +
> +	return work_on_cpu(cpu, collect_cpu_info_local, &cfc);
> +}

Couldnt this be done without work_on_cpu(), by using 
smp_call_function()?

	Ingo
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