Messages in this thread | | | Subject | Re: [PATCH] ubi: kill homegrown endian macros | From | David Woodhouse <> | Date | Fri, 18 May 2007 22:52:39 +0800 |
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On Fri, 2007-05-18 at 07:52 -0400, John Anthony Kazos Jr. wrote: > Out of curiosity, why would a compiler ever insert padding in a structure > that has all its elements properly-aligned?
Well, it might decide it would be nicer if some elements were aligned to 64 bits. Or to a cache line. Or something. I don't care about _why_ -- the point is that it's _allowed_ to. Hence the original use of __attribute__((packed)).
In practice, there's no real reason why it would do such a thing, which is why I removed the packed attribute and replaced it with a runtime check on the size of the structures in question.
-- dwmw2
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