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When sampling rate is 1, the sampling probability is UINT32_MAX. The packet should be sampled even the prandom32() generate the number of UINT32_MAX. And none packet need be sampled when the probability is 0. Signed-off-by: Wenyu Zhang <[email protected]> Acked-by: Pravin B Shelar <[email protected]> Signed-off-by: David S. Miller <[email protected]>