netdev - Re: [PATCH 1/2] genirq: add function to get IRQ edge/level flags

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Date:	Sat, 13 Apr 2013 03:21:26 +0200
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	Steve Glendinning <steve.glendinning@...well.net>,
	David Miller <davem@...emloft.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	Rob Herring <robherring2@...il.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Jon Hunter <jon-hunter@...com>,
	devicetree-discuss@...ts.ozlabs.org,
	linux-omap <linux-omap@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] genirq: add function to get IRQ edge/level flags

On 04/12/2013 11:56 PM, Stephen Warren wrote:
> On 04/12/2013 12:05 PM, Javier Martinez Canillas wrote:
> ...
>> So, is better to add an irq_get_trigger_type() function to obtain
>> the edge/level flags for an IRQ.
> 
>> diff --git a/include/linux/irq.h b/include/linux/irq.h
> 
>> +static inline u32 irq_get_trigger_type(unsigned int irq)
>> +{
>> +	struct irq_data *d = irq_get_irq_data(irq);
>> +	return d ? d->state_use_accessors & IRQD_TRIGGER_MASK : 0;
> 
> Should the direct access to d->state_use_accessors be replaced with a
> call to irqd_get_trigger_type()? Perhaps since this is inside the IRQ
> code header, there's no need to use the accessor function?
> 

Yes, it's better to use irqd_get_trigger_type() instead of a direct access to
d->state_use_accessors since that function is inline so it should be the same
performance wise and it will be easier to maintain.

I'll send a v2 changing that.

Thanks a lot and best regards,
Javier
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