ppc32 kernel boot problem (pmu related?)

[Benjamin Herrenschmidt]

> And that's where is locks hard.  Just as an alternative I tried
> compiling without i2c support, but the kernel locks hard at the exact
> same point.  Compiling without the pmu code is the only way I can get
> the kernel to boot.  There are some kernel messages missing from a
> kernel compiled with pmu versus a kernel without pmu, namely:
> 
> On node 0 total pages: 163840
>  DMA zone: 163840 pages, LIFO batch: 31
> 
> and
> 
> Calibrating delay loop... 49.79 BogoMIPS (lpj=99584)
> 
> but they do not seem to be anything serious.  Where to go from here?
> Thanks for the debugging suggestions so far, keep them coming please.

Can you try editing arch/powerpc/platforms/powermac/low_i2c.c, in
function pmac_i2c_init(), comment out the call to pmac_i2c_devscan() and
tell me if that makes a difference.

Thanks,
Ben.