On Fri, 05 Oct 2007 14:28:45 -0700 Jeremy Fitzhardinge <[EMAIL PROTECTED]> wrote:
> Andreas Schwab wrote: > > #define DMA_BIT_MASK(n) ((u64)-1 >> (64 - (n))) > > > > Yeah, that's cleaner. > Well yes, but DMA_BIT_MASK(0) invokes undefined behaviour, generates a compiler warning and evaluates to 0xffffffffffffffff (with my setup). That won't be a problem in practice, but it is strictly wrong and doesn't set a good exmaple for the children ;) - 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/
