From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jason Gunthorpe <jgg-uk2M96/98Pc@public.gmane.org>
Subject: Re: How far back does rdma-core X supports the kernel Y?
Date: Wed, 1 Nov 2017 12:00:01 -0600
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> >          if (attr_mask & ~((1ULL << (IBV_QP_DEST_QPN + 1)) - 1))
> 
> The above rdma-core code is correct, look at verbs.h:
> IBV_QP_DEST_QPN = 1 << 20,

Okay, then it should be

 if (attr_mask & ~(IB_QP_RATE_LIMIT - 1))

Jason
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