On Thu, 26 May 2011, Eric Dumazet wrote:
> > +#define cmpxchg16b(ptr, o1, o2, n1, n2) \
> > +({ \
> > + char __ret; \
> > + __typeof__(o2) __junk; \
> > + __typeof__(*(ptr)) __old1 = (o1); \
> > + __typeof__(o2) __old2 = (o2); \
> > + __typeof__(*(ptr)) __new1 = (n1); \
> > + __typeof__(o2) __new2 = (n2); \
> > + asm volatile(LOCK_PREFIX_HERE "lock; cmpxchg16b (%%rsi);setz %1" \
>
> If there is no emulation, why do you force rsi here ?
>
> It could be something else, like "=m" (*ptr) ?
>
> (same remark for other functions)
Well I ran into trouble with =m. Maybe +m will do. Will try again.
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