Subject: Re: use generic DMA mapping code in powerpc V4

From: Christoph Hellwig <[email-masked]>
Date: Sun, 16 Dec 2018 17:51:57 +0100

FYI, given that we are one week before the expected 4.20 release
date and I haven't found the bug plaging Christians setups I think
we need to defer most of this to the next merge window.

I'd still like to get a few bits in earlier, which I will send out
separately now.