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From: David Miller <davem@davemloft.net>
Subject: Re: LTP recv/recvmsg tests failing on 3.17
Date: Tue, 23 Sep 2014 11:59:41 -0400 (EDT)
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From: Willem de Bruijn <willemb@google.com>
Date: Tue, 23 Sep 2014 10:57:41 -0400

> I think applications simply cannot assume a consistent
> return value when passing unsupported combinations
> of flags. This is undefined behavior.

Agreed.