[PATCH v2] PCI: iproc: fix 32-bit build error

Arnd Bergmann arnd at arndb.de
Fri Oct 16 02:47:42 PDT 2015

On Thursday 15 October 2015 16:01:13 Bjorn Helgaas wrote:
> On Thu, Oct 15, 2015 at 09:40:45PM +0200, Arnd Bergmann wrote:
> > The iproc PCI driver tries to figure out whether the MMIO window has
> > a valid size, but does this using a 64-bit modulo operation, which
> > is not allowed on 32-bit kernels and leads to a link error:
> > 
> > drivers/built-in.o: In function `iproc_pcie_setup':
> > :(.text+0x4b798): undefined reference to `__aeabi_uldivmod'
> > 
> > This works around that error by using the div64_u64() function
> > provided by the kernel. While this is an expensive operation,
> > it is harmless because we only call it during the probing
> > of the driver.
> > 
> > Signed-off-by: Arnd Bergmann <arnd at arndb.de>
> > Acked-by: Ray Jui <rjui at broadcom.com>
> > Fixes: 0ab99ca8eb6c ("PCI: iproc: Fix compile warnings")
> This *looks* like it should be fixing 90e4032eeaf2 ("PCI: iproc: Add
> outbound mapping support"), not 0ab99ca8eb6c.
> 90e4032eeaf2 added the "if (size % ob->window_size)".
> Is this more subtle than that?

You are absolutely right, I must have copy-pasted the wrong entry.
Do you want me to resend this? I guess you can just remove the
line as this commit has not appeared in any release anyway.


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