From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Chiang <achiang@hp.com>
Date: Mon, 11 Jan 2010 19:58:25 +0000
Subject: lockdep support caused an MCA
Message-Id: <20100111195825.GE10162@ldl.fc.hp.com>
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To: linux-ia64@vger.kernel.org

This patch 2f02b4a12b24c9f077c6d739ac23c9b90840ccca:

Author: Luming Yu <luming.yu@intel.com>  2009-12-04 09:14:30

    [IA64] lockdep support
    
    Basic functionality for lockdep on ia64.
    
    Known issues:
    0. dynamic allocate per CPU area in lockdep.
    1. lock held in leave kernel.
    2. enabling CONFIG_DEBUG_LOCKDEP triggers the lockdep warning.
    3. Need to implement save_stack functions
    4. Replace some cpp macros with inline functions
    5. Add nmi_enter/nmi_exit
    
    Signed-off-by: Bob Picco <bob.picco@hp.com>
    Signed-off-by: Yu Luming <luming.yu@intel.com>
    Signed-off-by: Tony Luck <tony.luck@intel.com>

causes a very early MCA on an HP rx8640.

Unfortunately, even with early_printk turned on, the machine
encounters the MCA and reboots before any output occurs, so I
don't have any further information.

I haven't done any other triage on this as the patch has already
been dropped from Tony's tree, but I'd be happy to test the next
go-around.

Thanks,
/ac