#define forget(a) __asm__ __volatile__ ("" :"=m" (a) :"m" (a))[ This is exactly equivalent to using "+m" in the constraints, as recently explained on a GCC list somewhere, in response to the patch in my bitopsseries a few weeks back where I thought "+m" was bogus. ]
[It wasn't explained on a GCC list in response to your patch, as far as I can see -- if I missed it, please point me to an archived version of it]. One last time: it isn't equivalent on older (but still supported by Linux) versions of GCC. Current versions of GCC allow it, but it has no documented behaviour at all, so use it at your own risk. Segher - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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