On Fri, May 11, 2012 at 09:04:40PM +0100, Richard W.M. Jones wrote:
>   => 0x005fe934:       nop           ; (mov r0, r0)
>      0x005fe938:       b             0x5fe934

Well I guess there's more than one way to skin this cat.  I
disassembled the whole of vmlinux and found the code:

c05fe934 <__error>:
c05fe934:       e1a00000        nop                     ; (mov r0, r0)
c05fe938:       eafffffd        b       c05fe934 <__error>

Of the two call sites, it seems most likely to be a failure in
__lookup_processor_type.  Unfortunately the exact error message is not
shown, but at least I can adjust the addresses and breakpoint it now.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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