Christian Borntraeger <borntraeger@xxxxxxxxxx> wrote:
> +#define get_scalar_volatile_pointer(x) ({ \
> + typeof(x) *__p = &(x); \
> + volatile typeof(x) *__vp = __p; \
> + (void)(long)*__p; __vp; })
> +#define ACCESS_ONCE(x) (*get_scalar_volatile_pointer(x))
Might this cause two loads from memory under some conditions? Once for the
fourth line and once for the fifth?
(Apologies if this has already been discussed)
David
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