On Tue, 24 Jul 2007, Jeremy Fitzhardinge wrote: > > > > But gcc docs also talk about the other things volatile means, including > > "not significantly moved". > > Actually, it doesn't. In fact it goes out of its way to say that "asm > volatile" statements can be moved quite a bit, with respect to other > asms, other code, jumps, basic blocks, etc. Ahh. That's newer. Historically, gcc manuals used to say "may not be deleted or significantly reordered". So they've weakened what it means, probably exactly because it wasn't well-defined before either. Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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