[PATCH][2.6] hardware breakpoint fix/support for xmon

[Jake Moilanen]

> Im trying to make sure xmon is solid so am interested in any way someone
> can lock up xmon once this patch goes in.

I have seen a number of instances during bringup where one of the CPUs
will hang in a rtas call (due to a FW DSI), and then xmon would come in
and disable_surveillance and hang on the rtas lock.  I would suggest
removing the disable_surveillance() call since there are no boxes that
I'm aware of that enable surveillance by default.  Maybe make it a
separate command to disable surveillance similar to KDB.

Thanks,
Jake


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