linux-kernel - Re: [PATCH] irq: Export symbol no

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Message-ID: <1393931733.877810306@f371.i.mail.ru>
Date:	Tue, 04 Mar 2014 15:15:33 +0400
From:	Alexander Shiyan <shc_work@...l.ru>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH] irq: Export symbol no_action()

Вторник,  4 марта 2014, 12:05 +01:00 от Thomas Gleixner <tglx@...utronix.de>:
> On Sat, 1 Mar 2014, Alexander Shiyan wrote:
> 
> > This will allow to use dummy IRQ handler no_action() from
> > drivers compiled as module. For example, dummy handler is could
> > be used for drivers that use ARM FIQ interrupts.
> 
> And why exactly requires a driver which uses ARM FIQ interrupts the
> no_action implementation?

FIQ Interrupt handler is not used in this function. In FIQ case this is just a
dummy declaration. Real handler is assigned by using the set_fiq_handler().

> > @@ -41,6 +41,7 @@ irqreturn_t no_action(int cpl, void *dev_id)
> >  {
> >  	return IRQ_NONE;
> >  }
> > +EXPORT_SYMBOL(no_action);
> 
> EXPORT_SYMBOL_GPL if at all.

v2?

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