linux-kernel - Re: [patch] irq: use config_enabled(SMP) checks to cleanup irq_set

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Message-ID: <CAE9FiQX=UGETwk+j1YQzGSJQsvuTWBN1LzL_BbF2r5qS-EFG7Q@mail.gmail.com>
Date:	Thu, 7 Jun 2012 13:36:13 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	Ingo Molnar <mingo@...nel.org>, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	joerg.roedel@....com, paul.gortmaker@...driver.com,
	Sam Ravnborg <sam@...nborg.org>
Subject: Re: [patch] irq: use config_enabled(SMP) checks to cleanup
 irq_set_affinity() for UP

On Thu, Jun 7, 2012 at 1:31 PM, Suresh Siddha <suresh.b.siddha@...el.com> wrote:
>>
>> can you just use
>> if (nr_cpu_ids > 1)
>> checking instead
>> if config_enabled(CONFIG_SMP)
>
> Idea is to not have any extra runtime checks if CONFIG_SMP is enabled
> and which is when all the smp affinity routines are used/invoked.

then could use
if (NR_CPUS > 1)

Thanks

Yinghai
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