On Thu, Mar 22, 2012 at 3:44 PM, Jason Gunthorpe
[off-list ref] wrote:

For hardware facing structures I'd combine this with a static assert
to verify structure size at compile time.

So..

1) Avoid using attributes unless the structure has unaligned members.
2) Avoid creating structures with unaligned members (eg for userspace
  communication)
3) Frown at hardware/firmware developers who make communication
  structures with unaligned members :)
4) Be explicit about padding in your layout for 64/32
  compatibility.

Excellent summary, thanks Jason.

 - R.
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