Re: [PATCH] gdth update

["Jörn Engel" <joern@wohnheim.fh-wedel.de>]

On Wed, 29 September 2004 14:15:57 +0200, Leubner, Achim wrote:
>  
> > > +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
> > > +static irqreturn_t gdth_interrupt(int irq, void *dev_id, struct
> pt_regs *regs);
> > >  #else
> > > -static void gdth_interrupt(int irq,struct pt_regs *regs);
> > > +static void gdth_interrupt(int irq, void *dev_id, struct pt_regs
> *regs);
> > >  #endif
> > 
> > this really is the wrong way to do such irq prototype compatibility in
> > drivers. *really*
> > 
> So please tell me what the right way should be. It works without any
> problem.

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
#define irqreturn_t void
#define IRQ_NONE
#define IRQ_HANDLED
#endif

static irqreturn_t gdth_interrupt(int irq, void *_dev, struct pt_regs *regs)
{
	if (/*not for me*/)
		return IRQ_NONE;
	/* some work */
	return IRQ_HANDLED;
}

Magically get's converted to old driver code by the macros above.
Point is that all ugly parts are confined to some header and don't
pollute the driver proper.

Jörn

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