linux-kernel - Re: [PATCH] lib/cpumask.c: Optimize __any_online

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Message-ID: <1329310627.2437.18.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
Date:	Wed, 15 Feb 2012 13:57:07 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Cc:	akpm@...ux-foundation.org, kosaki.motohiro@...il.com,
	linux-kernel@...r.kernel.org, venki@...gle.com,
	rusty@...tcorp.com.au
Subject: Re: [PATCH] lib/cpumask.c: Optimize __any_online_cpu() calculation

Le mercredi 15 février 2012 à 18:05 +0530, Srivatsa S. Bhat a écrit :
> __any_online_cpu() uses a for loop at the moment.
> Instead, use cpumask_* operations to speed it up.
> 
> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
> ---
> Actually, the patch posted at https://lkml.org/lkml/2012/2/15/101 removed
> the last user of any_online_cpu() (and hence __any_online_cpu()).
> However, since this is an exported symbol, I refrained from removing this
> function altogether.

Just remove the export/function and eventually leave the helper ?

#define any_online_cpu(mask) cpumask_any_and(mask, cpu_online_mask)


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