Re: [Linux-ia64] CONFIG_USB_UHCI=y not possible?

[John Hesterberg <jh@sgi.com>]

On Wed, Feb 20, 2002 at 08:09:55AM -0800, Stephane Eranian wrote:
> John,
> 
> On Wed, Feb 20, 2002 at 09:50:38AM -0600, John Hesterberg wrote:
> > When I try to change CONFIG_USB_UHCI from a module to static (=m to =y),
> > I get:
> > 
> >     drivers/usb/usbdrv.o: In function `alloc_uhci':
> >     drivers/usb/usbdrv.o(.text.init+0x7e2): relocation truncated to fit: PCREL21B uhci_pci_remove
> > 
> > I don't see anything obvious (to me) with the disassembly:
> > 
> >      7e0:   11 60 01 40 00 21       [MIB]       mov r44=r32
> >      7e6:   00 00 00 02 00 00                   nop.i 0x0
> >      7ec:   08 00 00 50                         br.call.sptk.many b0~0 <alloc_uhci
> > 
> > It's see the same problem in a different kernel, with the same code
> > at a different offset (0x672).
> > 
> > Anyone have any idea what's going on with this?
> > 
> Your kernel is too big (exceed range for relocation). You have to compile some subsystems as modules.
> 
> -- 
> 
> -Stephane

I don't think that's it.  I've hit this problem with very different
configurations, with other stuff turned on and off.  It fails at
this exact spot.

As Bill Nottingham noted, I think it's because the USB UHCI code is
calling a init function from an exit function, or maybe vice versa.
I'm guessing that some of the err handling code in alloc_uhci is
somehow ending up calling uhci_pci_remove, which is defined as
__devexit, which gets discarded by arch/ia64/vmlinux.lds.S.  So I
think I've almost connected the dots. :-)

John