On 11/12/13 22:07, Andi Kleen wrote: >> Can you provide more info about these gcc builtins and what is the >> minimum system where this test will succeed? > > CMPXCHG for x86 is available since the 486 or so, so practically > everywhere. > > I think that's mainly for other architectures. > > it would be reasonable to just use #if defined(__x86_64__) || > defined(__i386__) > instead.
__sync_val_compare_and_swap() is being used in the itrace abstraction which is architecture neutral, so I can't use x86 defines. -- 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/
