On Tue, Jul 29, 2014 at 09:09:45AM +0800, Yuyang Du wrote: > > > +#define subtract_until_zero(minuend, subtrahend) \ > > > + (subtrahend < minuend ? minuend - subtrahend : 0) > > > > WTH is a minuend or subtrahend? Are you a wordsmith in your spare time > > and like to make up your own words? > > > > Also, isn't writing: x = max(0, x-y), far more readable to begin with? > > > > Ok. IIUC, max() does not handle minus number super good, and we don't need > the type > overhead in max(), so still use my macro, but won't be wordsmith again, :)
The 'type' muck is compile time, it doesn't generate any code. And max() deals just fine with negative numbers assuming you use signed types, which you could force with max_t(). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
