Looking at this:
> #ifndef atomic_inc_unless_negative
> static inline int atomic_inc_unless_negative(atomic_t *p)
> {
> int v, v1;
> for (v = 0; v >= 0; v = v1) {
> v1 = atomic_cmpxchg(p, v, v + 1);
> if (likely(v1 == v))
> return 1;
> }
> return 0;
> }
> #endif
why is it optimised for '*p' being zero??
I'd have though the initial assignment to 'v' should
be made by reading '*p' without any memory barriers (etc).
David
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