linux-kernel - Re: [PATCH] irqchip: gic: Don't complain in gic_get

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Message-ID: <51E71C78.6080604@codeaurora.org>
Date:	Wed, 17 Jul 2013 15:36:40 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Nicolas Pitre <nicolas.pitre@...aro.org>
CC:	Javi Merino <javi.merino@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <rmk+kernel@....linux.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] irqchip: gic: Don't complain in gic_get_cpumask() if
 UP system

On 07/17/13 15:34, Nicolas Pitre wrote:
> On Wed, 17 Jul 2013, Stephen Boyd wrote:
>
>> On 07/12/13 05:10, Stephen Boyd wrote:
>>> On 07/12, Javi Merino wrote:
>>>> I agree, we should drop the check.  It's annoying in uniprocessors and
>>>> unlikely to be found in the real world unless your gic entry in the dt
>>>> is wrong.
> And that's a likely outcome in the real world.
>
>>> Ok. How about this?
>> Any comments?
> What about this instead:

Unfortunately arm64 doesn't have SMP_ON_UP. It sounds like you preferred
the first patch using num_possible_cpus()

>
> diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
> index 19ceaa60e0..86d21bc6cb 100644
> --- a/drivers/irqchip/irq-gic.c
> +++ b/drivers/irqchip/irq-gic.c
> @@ -368,7 +368,7 @@ static u8 gic_get_cpumask(struct gic_chip_data *gic)
>  			break;
>  	}
>  
> -	if (!mask)
> +	if (is_smp() && !mask)
>  		pr_crit("GIC CPU mask not found - kernel will fail to boot.\n");
>  
>  	return mask;
>
>
> Nicolas


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