linux-kernel - Re: [PATCH 1/11] Add generic helpers for arch IPI function calls

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Date:	Thu, 24 Apr 2008 23:01:57 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	npiggin@...e.de, torvalds@...ux-foundation.org,
	peterz@...radead.org, sam@...nborg.org
Subject: Re: [PATCH 1/11] Add generic helpers for arch IPI function calls

On Tue, Apr 22, 2008 at 08:50:17PM +0200, Jens Axboe wrote:
> +		data->csd.func(data->csd.info);
> +
> +		spin_lock(&data->lock);
> +		cpu_clear(cpu, data->cpumask);
> +		WARN_ON(data->refs == 0);
> +		data->refs--;
> +		refs = data->refs;

Probably a silly question, but what does data->refs do that
cpus_empty(data->cpumask) wouldn't do?  (as indeed ARM presently does.)

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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