Re: [PATCH] iomap: make PCI iomap stuff excluded when PCI isn't configured

[Al Viro <viro@ftp.linux.org.uk>]

On Sat, Feb 10, 2007 at 05:14:13PM -0500, Tejun Heo wrote:
> Heiko Carstens wrote:
> >On Sat, Feb 10, 2007 at 12:43:16PM -0500, Tejun Heo wrote:
> \>> Heiko, how about this?  Does it fix s390?
> >
> >Unfortunately not. Now I get
> >
> >  CC      lib/iomap.o
> >lib/iomap.c: In function 'devm_ioport_map_release':
> >lib/iomap.c:270: warning: implicit declaration of function 'ioport_unmap'
> >lib/iomap.c: In function 'devm_ioport_map':
> >lib/iomap.c:297: warning: implicit declaration of function 'ioport_map'
> >lib/iomap.c:297: warning: assignment makes pointer from integer without a 
> >cast
> 
> I think an arch needs to support ioport_map/unmap and noncoherent dma 
> (just alias to coherent interface on x86/amd64) interface whether PCI is 
> implemented or not.  No?

Another source of breakage: you get devm_request_irq() only if you have
GENERIC_HARDIRQS.  Otherwise kernel/irq/ is simply not built.  Again,
you are mixing default implementation of primitives with the
implementation-agnostic stuff around those primitives.  I'd split
kernel/irq/manage.c in two files and have the places providing
alternative implementations (e.g. arch/sparc/kernel) refer to new
file in their makefiles...

I'm mostly done with that stuff, modulo noncoherent_dma breakage.  Will
send patch once the irq crap is dealt with...