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    SubjectRe: [PATCH] reduce export symbol CRC table size on 64-bit archs
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    On Mon, 2009-07-13 at 09:44 +0100, Jan Beulich wrote:
    > >>> Michal Marek <mmarek@suse.cz> 13.07.09 10:11 >>>
    > >Jan Beulich napsal(a):
    > >> Actually I meanwhile think that module-init-tools can easily detect the changed
    > >> layout without any further kernel side adjustments: Since it is known that a
    > >> CRC always is a 32-bit value, simply checking whether the so-far-used 64-bit
    > >> value has more than 32 significant bits should suffice: If so, the new layout
    > >> is being used (with the symbol name starting at offset 4), else the old one is
    > >> in effect (name at offset 8). This ought to be a pretty trivial change to that
    > >> code.
    > >
    > >But old module-init-tools will continue reading garbage in this case.

    Most of the distros can fix that with a dependency on the kernel package
    in the absolute worst case, not that I love that idea, but it happens. I
    assume for now we are going with detecting the two possibilities because
    it doesn't really hurt in any case to have this support.

    Jon.




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