Andrew Morton writes: > Matt Porter <[EMAIL PROTECTED]> wrote: > > > > +static u64 dma_mask = 0xffffffffULL; > > I'm sure you're totally uninterested in this, but the above will probably > generate warnings on (say) ppc64, where u64 is implemented as unsigned > long. > > I usually chuck a simple `-1' in there and the compiler always gets it > right, regardless of signedness and size and architecture.
Umm, I think we actually want 2^32-1 not -1, don't we? In which case I think Matt's code is what we have to have. I tried a little test compile with gcc 4.0 with -m64 -Wall and it didn't generate a warning with the 0xffffffffULL constant. 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/
