>>> On 25.08.15 at 03:57, <feng...@intel.com> wrote: > --- a/xen/include/asm-x86/x86_64/system.h > +++ b/xen/include/asm-x86/x86_64/system.h > @@ -6,6 +6,34 @@ > (unsigned long)(n),sizeof(*(ptr)))) > > /* > + * Atomic 16 bytes compare and exchange. Compare OLD with MEM, if > + * identical, store NEW in MEM. Return the initial value in MEM. > + * Success is indicated by comparing RETURN with OLD. > + * > + * This function can only be called when cpu_has_cx16 is true. > + */ > + > +static always_inline __uint128_t __cmpxchg16b( > + volatile void *ptr, __uint128_t *old, __uint128_t *new)
Noted just now - the latter two should both be const. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
