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    SubjectRe: [PATCH 13/14] x86/ticketlock: add slowpath logic
    On 11/17/2010 12:52 AM, Jeremy Fitzhardinge wrote:
    > But, yes, %z0 sounds interesting. Is it documented anywhere? I think
    > I've tried to use it in the past and run into gcc bugs.
    This one: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39590

    Should be OK in this case because there's no 64-bit values to be seen...

    J


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