On Tue, Nov 24, 2015 at 10:19:52PM +0100, Frederic Weisbecker wrote: > Also note that or_return() means that you first do OR and then return the new > value.
Yes, that's useless. OR is an irreversible operator, which means or_return() looses data. You can never say if a bit included in the mask was set before. You really must have fetch_or(). -- 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/
