Re: [RFC/PATCH 4/7] Powerpc MSI implementation

[Russell King <rmk-pci@arm.linux.org.uk>]

On Tue, Nov 07, 2006 at 01:44:32PM -0700, Matthew Wilcox wrote:
> On Tue, Nov 07, 2006 at 08:14:36PM +0000, Russell King wrote:
> > On Tue, Nov 07, 2006 at 01:07:30PM -0700, Matthew Wilcox wrote:
> > > We have the per-irq void *chip_data; could this be the right place to
> > > keep it instead?  That way, it won't take up space in the pci_dev for
> > > devices which don't use MSI.
> > 
> > Bah.  chip_data is supposed to be __iomem.  I bet if you build ARM
> > with sparse it'll kick out lots of warnings as a result of that loss.
> 
> Erm, since when?  When I introduced it (back in January 2005 [1]), it
> was called handler_data and pointed to a struct which is chip-type
> dependent.

Since before the generic irq merge.  If I was more expert with git
I'd post a URL, but I'm not so I won't.  But I'm sure you can find
it - look at the history of include/asm-arm/mach/irq.h.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core