one question about openvswitch flow_hash

[Tonghao Zhang]

Hi Pravin
one question about openvswitch, why we add BUILD_BUG_ON in flow_hash?
It is never be true, right ?

flow_hash
...

        /* Make sure number of hash bytes are multiple of u32. */
        BUILD_BUG_ON(sizeof(long) % sizeof(u32));

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