On Thu, Aug 16, 2007 at 11:54:54AM -0700, Christoph Lameter wrote: > On Thu, 16 Aug 2007, Paul Mackerras wrote: > > So I don't see any good reason to make the atomic API more complex by > > having "volatile" and "non-volatile" versions of atomic_read. It > > should just have the "volatile" behaviour. > > If you want to make it less complex then drop volatile which causes weird > side effects without solving any problems as you just pointed out. The other set of problems are communication between process context and interrupt/NMI handlers. Volatile does help here. And the performance impact of volatile is pretty near zero, so why have the non-volatile variant? Thanx, Paul - 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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