Messages in this thread | | | Date | Thu, 15 Feb 2007 16:13:41 -0800 | From | Jeremy Fitzhardinge <> | Subject | Re: [PATCH] Optimize generic get_unaligned / put_unaligned implementations. |
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Andrew Morton wrote: > hm. So if I have > > struct bar { > unsigned long b; > } __attribute__((packed)); > > struct foo { > unsigned long u; > struct bar b; > }; > > then the compiler can see that foo.b.b is well-aligned, regardless of the > packedness.
In Ralf's code, the structure is anonymous, and is used to declare a pointer type, which is initialized from a void *. So I think the compiler isn't allowed to assume anything about its alignment.
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