On Mon, Jan 05, 2009 at 02:38:19PM +0100, Ingo Molnar wrote:
>
> * Sam Ravnborg <sam@xxxxxxxxxxxx> wrote:
>
> > I hit the following build error on sparc:
> >
> > drivers/gpio/gpiolib.c: In function `gpiolib_dbg_show':
> > drivers/gpio/gpiolib.c:1146: error: implicit declaration of function `irq_to_desc'
> > drivers/gpio/gpiolib.c:1146: warning: initialization makes pointer from integer without a cast
> >
> >
> > This is with an allmodconfig where I did:
> >
> > make ARCH=sparc vmlinux
> >
> > sparc do _not_ have GENERIC_HARDIRQS set to 'y'.
> >
> > I did a simple:
> > #include <linux/irqnr.h> but that did not help.
>
> yeah. Does the patch below do the trick?
Needed a small fix - see below.
>
> btw., i'm curious, does the unification of the sparc architectures mean
> that sparc32 will be using genirq too some time in the future?
Dave has mentioned this but we are not working actively on it yet.
>
> Ingo
>
> ---------------->
> From 08522e214542b4afc6c2401bb02900cfca76f600 Mon Sep 17 00:00:00 2001
> From: Ingo Molnar <mingo@xxxxxxx>
> Date: Mon, 5 Jan 2009 14:34:42 +0100
> Subject: [PATCH] genirq: provide irq_to_desc() to non-genirq architectures too
>
> Impact: build fix on non-genirq architectures
>
> Sam Ravnborg reported this build failure on sparc32 allmodconfig,
> the GPIO drivers assume the presence of irq_to_desc():
>
> drivers/gpio/gpiolib.c: In function `gpiolib_dbg_show':
> drivers/gpio/gpiolib.c:1146: error: implicit declaration of function 'irq_to_desc'
>
> Add it in the !genirq case too.
>
> Reported-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
> ---
> include/linux/irqnr.h | 7 ++++++-
> 1 files changed, 6 insertions(+), 1 deletions(-)
>
> diff --git a/include/linux/irqnr.h b/include/linux/irqnr.h
> index 5504a5c..6b719fa 100644
> --- a/include/linux/irqnr.h
> +++ b/include/linux/irqnr.h
> @@ -8,7 +8,12 @@
>
> #ifndef CONFIG_GENERIC_HARDIRQS
> #include <asm/irq.h>
> -# define nr_irqs NR_IRQS
> +
> +/*
> + * Wrappers for non-genirq architectures:
> + */
> +#define nr_irqs NR_IRQS
> +#define irq_to_desc(irq) irq_desc[irq]
irq_to_desc(irq) return a pointer to a struct irq_desc
so we need to take the address.
> +#define irq_to_desc(irq) &irq_desc[irq]
^
With this small fix the build continues.
Thanks,
Sam
--
To unsubscribe from this list: send the line "unsubscribe sparclinux" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
