From mboxrd@z Thu Jan  1 00:00:00 1970
From: Julien Grall <julien.grall@linaro.org>
Subject: Re: [PATCH] xen/arm: minor improvement in
	smp_send_call_function_mask()
Date: Thu, 21 Aug 2014 11:54:45 -0500
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To: Anup Patel <anup.patel@linaro.org>
Cc: Ian Campbell <Ian.Campbell@citrix.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, patches <patches@apm.com>, xen-devel <xen-devel@lists.xen.org>, "stefano.stabellini" <stefano.stabellini@citrix.com>, Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
List-Id: xen-devel@lists.xenproject.org

Hi Anup,

On 21/08/14 06:04, Anup Patel wrote:
>> The best alternative would be cpumask_empty.
>
> All three cpumask_empty(), cpumask_first(), and cpumask_weight()
> are O(N) where N is number of bits in cpumask.
> It really does not make much difference which of these operation
> is chosen.

Hmmm right. That the worst case for all, and always the case for 
cpumask_weight. Anyway...

> Since empty target list is fine with GIC Distributor, I will drop the check.

Assuming you only remove the check in the next version:

Acked-by: Julien Grall <julien.grall@linaro.org>

Regards,

-- 
Julien Grall