From aa0a4ef4ac3a3c5ffa35e32520bfbc0922ef3630 Mon Sep 17 00:00:00 2001
From: Andy Grover <andy.grover@oracle.com>
Date: Tue, 13 Apr 2010 12:00:35 -0700
Subject: [PATCH] RDS: Make sure cmsgs aren't used in improper ways

It hasn't cropped up in the field, but this code ensures it is
impossible to issue operations that pass an rdma cookie (DEST, MAP)
in the same sendmsg call that's actually initiating rdma or atomic
ops.

Disallowing this perverse-but-technically-allowed usage makes silent
RDMA heuristics slightly easier.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
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