netdev - one question about openvswitch flow

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Message-ID: <CAMDZJNWSBGzwR8-xuUy5B8g0uHXi6gpZP6gn6bkTLDpzcsutrw@mail.gmail.com>
Date:   Mon, 23 Sep 2019 11:55:48 +0800
From:   Tonghao Zhang <xiangxia.m.yue@...il.com>
To:     Pravin Shelar <pshelar@....org>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        ovs-discuss@...nvswitch.org
Subject: one question about openvswitch flow_hash

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));

 ...