RE: compatability with older versions of UEFI

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> "Memory Error Section 2". One option we have without having to disturb
> user space handler of memory error trace data would be to change
> "struct cper_mem_err_compact" so the affected elements are of
> __u32 instead of __u16. Drawback of this option is that the trace
> buffer will be unnecessarily bigger if a platform generates
> "Memory Error Section" data instead of "Memory Error Section 2" data.

That structure is visible to user level consumers of the event (perhaps just
one of those right now?):

  git://git.fedorahosted.org/rasdaemon.git

We were not as smart as UEFI and didn't include a version number, or other
plan,  that would allow us to transition to a new format cleanly.

Perhaps we could re-purpose some of the high order "validation_bits"
as a version number?  It's a u64 and UEFI 2.5 is only up to bit21 so far,
so perhaps it will be a long, long time before they get that many fields
in some future standard.

-Tony
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