Aliasing issue with TAILQ on ppc64 ?

[Poul-Henning Kamp]

In message <alpine.BSF.2.00.1209180858190.47770 at desktop>, Jeff Roberson writes:

>If you compile at low optimization levels I assume it goes away?

I don't have access to the machine at this time, and in general
I'm not particular focused on PPC64, since this is a general
problem on any architecture, as I understand the C-language rules.

>Can you place asm volatile ("" ::: "memory"); between the two tailq macros 
>with the same optimization level?

I tried earlier to put a printf("FOO") there, and that fixed it, which
I why I diagnosed it as an aliasing issue in the first place.

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