From mboxrd@z Thu Jan  1 00:00:00 1970
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
Date: Sat, 01 May 2010 09:44:36 +0000
Subject: Re: [PATCH] ARM: Add support for 10 hardirq bits
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	<u2yaec7e5c31004292102rd561d7detc73e9fd2a5570ab0@mail.gmail.com>
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To: linux-arm-kernel@lists.infradead.org

On Fri, Apr 30, 2010 at 01:02:04PM +0900, Magnus Damm wrote:
> On Wed, Mar 10, 2010 at 8:17 PM, Magnus Damm <magnus.damm@gmail.com> wrot=
e:
> > From: Magnus Damm <damm@opensource.se>
> >
> > This patch adds support for 10 hardirq bits to
> > the ARM architecture. Needed by the SH-Mobile
> > ARM processor sh7372 that has more than 512 IRQs.
> >
> > Signed-off-by: Magnus Damm <damm@opensource.se>
> > ---
> >
> > =A0arch/arm/include/asm/hardirq.h | =A0 =A04 +++-
> > =A01 file changed, 3 insertions(+), 1 deletion(-)
> >
> > --- 0001/arch/arm/include/asm/hardirq.h
> > +++ work/arch/arm/include/asm/hardirq.h 2010-03-09 21:08:10.000000000 +=
0900
> > @@ -12,7 +12,9 @@ typedef struct {
> >
> > =A0#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_=
t above */
> >
> > -#if NR_IRQS > 256
> > +#if NR_IRQS > 512
> > +#define HARDIRQ_BITS =A0 10
> > +#elif NR_IRQS > 256
> > =A0#define HARDIRQ_BITS =A0 9
> > =A0#else
> > =A0#define HARDIRQ_BITS =A0 8
> >
>=20
> Hi Russell,
>=20
> Good to hear that you are back online. Do you want me to rework this
> patch somehow, or is it ready to be queued for upstream merge? I'm
> asking because I have a pile of patches that depend on this one.

I guess it's ok; with 10 bits we're at the maximum which the generic
kernel supports (see linux/hardirq.h)