On Thursday 25 September 2014, Daniel Thompson wrote: > > + > > +#ifndef readq_relaxed > > +#define readq_relaxed readq > > +#endif > > Not really sure if it matters but this gives a rather surprising > behaviour to #ifdef readq_relaxed given that readq may not be defined. > It was intentional. I could have written this as #if !defined(readq_relaxed) && defined(readq) but the effect would be almost the same, and the version I picked looks simpler. Note that 32-bit architectures could provide readq, it's just the generic code that doesn't, because most you typically don't get atomic 64-bit accesses from dereferencing a 64-bit pointer as the generic readq() function does. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
