linux-kernel - Re: [PATCH 01/10] cpumask: Introduce cpumask_any_online

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Message-ID: <alpine.DEB.2.11.1506161018210.4120@nanos>
Date:	Tue, 16 Jun 2015 10:20:28 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Vikas Shivappa <vikas.shivappa@...el.com>
cc:	Peter Zijlstra <peterz@...radead.org>,
	Vikas Shivappa <vikas.shivappa@...ux.intel.com>,
	linux-kernel@...r.kernel.org, x86@...nel.org, hpa@...or.com,
	mingo@...nel.org, matt.fleming@...el.com, will.auld@...el.com,
	linux-rdt@...ists.intel.com
Subject: Re: [PATCH 01/10] cpumask: Introduce cpumask_any_online_but

On Mon, 15 Jun 2015, Vikas Shivappa wrote:
> On Mon, 15 Jun 2015, Peter Zijlstra wrote:
> > On Fri, Jun 12, 2015 at 11:17:08AM -0700, Vikas Shivappa wrote:
> > > +	cpumask_and(&tmp, cpu_online_mask, mask);
> > > +	cpumask_clear_cpu(cpu, &tmp);
> > > +	return cpumask_any(&tmp);
> > > +}
> > 
> > You had a good example in cpumask_any_but() copy that.
> 
> I saw the cpumask_any_but but wanted to avoid the for loop in the
> cpumask_any_but , but now i see why from your previous comment. Without the
> cpumask_t I will have to use the cpumask_any_but .. the two were related.

It can be done w/o a loop. Hint, you need a static cpumask in your
code anyway.

Thanks

	tglx
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