[openib-general] DMA mapping abuses in MAD layer

[Roland Dreier]

    Sean> Any preference to pursuing this change or modifying
    Sean> ib_post_send_mad to take an ib_mad_send_buf?

I think it's going to be confusing to cast a virtual address to a long
and then ignore the lkey field.  So I would go with a new interface
not built on ib_sge.

On the other hand, maybe struct sg_list is what we should be using??
(Just thinking out loud here, so to speak)

 - R.